• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    CUTTING INSERT AND CUTTING TOOL. One aspect of the present invention provides a cutting insert (10) having a plurality of cutting parts (18) that are formed at the intersections between each edge (12, 14) and a peripheral face 16. each cutting part includes a first edge cutting edge (18a) and a second cutting edge (18b). In an extreme view, each edge is alternately provided with a first corner (20) and a second corner (22), which have different internal angles. The internal angle (Alpha) of the first corner (20) is smaller than the internal angle (Beta) of the second corner (22, 122, 222). Each first cutting edge (18a) has a part that extends in order to approach a central plane (M) with increasing distance from the corresponding first corner (20). A first lateral part (30a) extending from each first cutting edge to the peripheral face forms an obtuse internal insert angle with respect to a plane parallel to the central plane (M), passing through the first cutting edge, while a the second lateral part (30b), extending from each second cutting edge to the peripheral face, forms an acute internal angle of insertion with respect to a plane parallel to the central plane (M) passing (...).
    公开号:BR112013006948B1
    申请号:R112013006948-1
    申请日:2011-09-27
    公开日:2021-01-19
    发明作者:Kedar Suresh Bhagath；Takashi Yamaguchi
    申请人:Tungaloy Corporation；
    IPC主号:
    专利说明:

    TECHNICAL FIELD
    [001] The present invention relates to a cutting insert and a cutting tool and, in particular, to a cutting insert used in an indexable cutting tool and a cutting tool in which the cutting insert is separably fixed in a tool body. BACKGROUND OF THE INVENTION
    [002] An example of a cutting insert and a cutting tool is described in Patent Literature 1. The cutting insert fixed to a tool body described in Patent Literature 1 is formed in a substantially hexagonal plate shape and is equipped with two same opposite extreme surfaces and a peripheral surface extending between them. In the cutting insert, a cutting edge is formed at the intersecting part or at the intersecting edge part between the extreme surface and the peripheral surface. The same cutting parts are formed respectively between three particular corners of each extreme surface, and each cutting part includes a larger cutting edge and a smaller cutting edge. Each of the three particular corners has an internal obtuse angle. which is 102.5o, according to the description in the Patent Literature 1. A greater sloping surface, related to each major cutting edge, and a smaller inclined surface, related to each minor cutting edge, extend in each extreme surface. A larger flank surface related to each major cutting edge and a smaller flank surface related to a given minor cutting edge extend over the peripheral surface. The larger flank surface, extending from the larger cutting edge of one extreme surface, is formed to be integral with the smaller flank surface, extending from the smaller cutting edge of the other extreme surface. In the cutting insert, a plane extending midway between both extreme surfaces, in such a way as to bisect the cutting insert, is defined as a plane, each of the major flank surfaces forms an internal obtuse angle with a plane passing through corresponding major cutting edge and parallel to the median plane. On the other hand, each of the minor flank surfaces forms an acute internal angle of insertion with a plane passing through the corresponding minor cutting edge and being in parallel with the median plane. Such a cutting insert from Patent Literature 1 and the cutting tool equipped with this cutting insert are a cutting insert used for a so-called high feed cutter, and the high feed cutter. Therefore, in the cutting tool of Patent Literature 1, a different corner of the cutting insert corners attached to the tool body, each having a greater angle, that is, the particular corners above are positioned at the leading end of the cutting tool. cutting angle, and a cutting edge angle when using the cutting tool is small. With reference to the figure in Patent Literature 1, the cutting edge angle of the cutting tool is approximately 20o.
    [003] In addition, Patent Literature 2 describes a different cutting insert and a different cutting tool. The cutting insert fixed to a tool body described in Patent Literature 2 is formed in a substantially pentagonal plate shape and is equipped with two opposite extreme surfaces and a peripheral surface extending between them. In the cutting insert, a plane extending midway between both extreme surfaces, in such a way as to bisect the cutting insert, is defined as a median plane, a cutting region including a cutting edge related to a vertex part of the pentagon and the periphery is raised in such a way as to separate from the median plane. Therefore, each of the larger cutting edge and the smaller cutting edge of the same cutting region are tilted to be closer and gradually closer to the median plane as the distance from the common vertex part increases. A cutting tool, on which the cutting insert of Patent Literature 2 is attached, is also called a feed cutter, and the angle of the cutting edge, when using the cutting tool, is small.
    [004] The cutting inserts and cutting tools of the Patent Literature 1 and Patent Literature 2 are diverted to the so-called high feed cutters. Therefore, even on any of the cutting tools, the angle of the cutting edge is small and the length of the largest operating edge, in the direction of the rotational geometric axis of the rotational cutting tool, is very short. Therefore, the cutting inserts and cutting tools described in Patent Literature 1 and Patent Literature 2 are inappropriate for deep cutting.
    [005] On the other hand, in a cylindrical cutter as a rotational cutting tool capable of performing flat processing at an angle of the cutting edge of 45o or more, as a cutting insert having cutting edges on both extreme surfaces, it is generally a cutting insert is used in which an angle between the extreme surface and the peripheral surface is made substantially as a right angle, i.e., a so-called negative type of cutting insert. When this negative type of cutting insert is attached to the tool body, to ensure a free angle in the direction of the rotational geometry axis (axial direction), the cutting insert is arranged in the tool body in such a way that an angle of inclination negative is given in the axial direction as a whole. Therefore, in order to ensure an axial inclination angle as the cutting tool for a positive angle, it is necessary to provide a raised part on the inclined surface of the cutting insert, that is, the extreme surface. In this way, this cutting insert has the limitation of establishing the axial inclination angle and is generally unsuitable for making deep cuts. It should be noted that the cutting insert in Patent Literature 2 is a so-called negative type of cutting insert.
    [006] The present invention has the objective of providing a cutting insert and a cutting tool that can be applied to cut in a deep cut. Citation List Patent Literature PTL 1: WO08 / 120186 Pamphlet PTL 2: WO08 / 120188 Pamphlet SUMMARY OF THE INVENTION
    [007] In accordance with an aspect of the present invention, a cutting insert is provided comprising: two opposite extreme surfaces; a peripheral surface extending between the two extreme surfaces; and a cutting edge formed at the intersection part of each end surface and the peripheral surface, the cutting edge including a plurality of cutting parts, each cutting part including a first cutting edge and a second cutting edge; where in an extreme surface view of the cutting insert, the first corners and second corners that differ in their internal angles are alternately formed on each extreme surface, the internal angle of the first corner being less than the internal angle of the second corner ; each cutting part is located between the two second corners and in each cutting part the first cutting edge and the second cutting edge extend from the first common corner in different directions; a medium plane extending between the two extreme surfaces is defined in order to bisect the cutting insert; each first cutting edge has a part extending in order to be closer to the median plane when the distance from the corresponding first corner increases; a first lateral surface part, extending on the peripheral surface of each first cutting edge, has a part forming an obtuse internal insertion angle in a plane passing through the first cutting edge and being parallel to the median plane; and a second side surface part, extending over the peripheral surface of each second cutting edge, has a part forming an acute internal insert angle with a plane passing through the second cutting edge and being parallel to the median plane.
    [008] Preferably, the acute internal insert angle is within the range that is 65o or greater and which is 88o or less.
    [009] Preferably, the internal angle of the second corner is within the range that is 153o or greater and which is 179o or less.
    [0010] Preferably, the internal angle of the first corner is within the beech which is 110o or greater and which is less than 135o.
    [0011] Preferably, in an extreme surface view of the cutting insert, the ratio of a length of the first cutting edge to a length of the second cutting edge is within a range of 4: 1 to 5: 2, including 4 : 1 and 5: 2. More preferably, in the extreme surface view of the cutting insert the ratio of the length of the first cutting edge to the length of the second cutting edge is approximately 3: 1.
    [0012] Preferably, each first part of the lateral surface related to an extreme surface of the two extreme surfaces is in the same plane as a corresponding second part of the lateral surface related to the other extreme surface of the two extreme surfaces.
    [0013] Preferably, in an extreme surface view of the cutting insert, each extreme surface has a substantially polygonal shape, in order to be formed by ten or more even numbers of sides. For example, a cross-sectional shape of the midplane cutting insert can be a substantially regular decagon.
    [0014] In addition, according to another aspect of the present invention, a cutting tool is provided comprising: a tool body; and at least one insert seat formed in the tool body, the insert seat being configured to hold the cutting insert as described above. Preferably, the cutting tool is a rotary cutting tool.
    [0015] Preferably, in the cutting insert fixed on the tool body, each of the first and second surface parts, extending from the first and second operating cutting edges of a related extreme surface acts as an inclined surface and each of the first and second side surface parts extending from the first and second operative cutting edges it acts as an inclined surface.
    [0016] Preferably, in the cutting insert fixed on the tool body, a first operative cutting edge acts as a larger cutting edge, and a second operative cutting edge acts as a finishing edge.
    [0017] According to the present invention, when the cutting insert is fixed on the tool body, the positive axial inclination angle can be appropriately obtained and also the large angle of the cutting edge can be obtained. Therefore, the excellent effect of making it possible to cut in the deep cut is achieved.
    [0018] These and other details of the invention will be better understood through a study of the following detailed description and attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS
    [0019] Fig. 1 is a perspective view of a cutting insert according to a first embodiment of the present invention; Fig. 2 is a plan view of the cutting insert shown in Fig. 1; Fig. 3 is a front view of the cutting insert shown in Fig. 2; Fig. 4 is a bottom view of the cutting insert shown in Fig. 2; Fig. 5 is a rear view of the cutting insert shown in Fig. 2; Fig. 6 is a right side view of the cutting insert shown in Fig. 2; Fig. 7 is a cross-sectional view of line VII-VII in Fig. 2 of the cutting insert shown in Fig. 2; Fig. 8 is a cross-sectional view of line VIII-VIII in Fig. 2 of the cutting insert shown in Fig. 2; Fig. 9 is a perspective view of a milling machine as a rotary cutting tool on which the cutting insert of Fig. 1 is mounted, according to the first embodiment; Fig. 10 is a plan view of the cutter in Fig. 9. Fig. 11 is a cross-sectional view of line XI-XI in Fig. 10; Fig. 12 is an enlarged view of circle XII in Fig. 11; Fig. 13 is a cross-sectional view of line XIII-XIII in Fig. 10; Fig. 14 is an enlarged view of circle XIV in Fig. 13; Fig. 15 is a perspective view of a cutting insert according to a second embodiment of the present invention; Fig. 16A is a plan view of the cutting insert shown in Fig. 15; Fig. 16B is a rear view of the cutting insert shown in Fig. 16A; Fig. 16C is a front view of the cutting insert shown in Fig. 16A; Fig. 16D is a right side view of the cutting insert shown in Fig. 16A; Fig. 17 is a perspective view of a boring tool such as a cutting tool to which the cutting insert of Fig. 15 is attached, according to the second embodiment; Fig. 18A is a front view of the boring tool shown in Fig. 17; Fig. 18B is a top view of the boring tool shown in Fig. 17; Fig. 18C is a top view of the boring tool shown in Fig. 17; Fig. 19 is a perspective view of a cutting insert according to a third embodiment of the present invention; Fig. 20A is a top view of the cutting insert shown in Fig. 19; Fig. 20B is a right side view of the cutting insert shown in Fig. 20A; Fig. 20C is a front view of the cutting insert shown in Fig. 20A; Fig. 21 is a perspective view of a boring tool such as a cutting tool to which the cutting insert of Fig. 19 is attached, according to the third embodiment; Fig. 22A is a front view of the boring tool shown in Fig. 21; Fig. 22B is a top view of the boring tool shown in Fig. 21; and Fig. 22C is a top view of the boring tool shown in Fig. 21. DESCRIPTION OF METHODS
    [0020] An explanation of the embodiments of the present invention will be made with reference to the drawings.
    [0021] A first embodiment will be explained with reference to Fig. 1 to Fig. 14. A cutting insert 10 of the first embodiment is illustrated from Fig. 1 to Fig. 8.
    [0022] The cutting insert 10 according to the first embodiment of the present invention is configured as an insert for a cutter between the rotational cutting tools. The cutting insert 10 comprises two extreme surfaces 12 and 14 opposing each other, that is, facing in opposite directions, and a peripheral surface 16 extending between them. In the cutting insert 10 of the first embodiment, the two end surfaces are identical to each other and are formed in the same shape, but one or more different parts can be configured on the end surfaces 12 and 14. For example, either or both the two end surfaces 12 and 14 may have marks for identification. Here, for easy explanation, an extreme surface 12 is called an upper surface or a first extreme surface and the other extreme surface 14 is called a lower surface or a second extreme surface, but the relationship between them can be reversed.
    [0023] A cutting edge is formed at the intersecting part or the intersecting edge part between each of the end surfaces 12 and 14 and the peripheral surface 16. The cutting edge is segmented into a plurality of cutting parts 18. Here, the plurality of cutting parts 18 are sequentially connected to each other, but can be formed independent of each other.
    [0024] As shown in Fig. 1 or Fig. 2, the cutting insert 10 is formed in a substantially decagonal plate shape. In an extreme surface view of the cutting insert 10, as shown in Fig. 2 and Fig. 4. two kinds of corners 20 and 22, having different angles of intersection between two adjacent sides, that is, different internal angles α and β , are formed alternately on each of the upper surface 12 and lower surface 14. Here, for ease of explanation, a corner 20 is called the first corner and the other corner 22 is called the second corner. The internal angle α of the first corner 20 is formed less than the internal angle β of the second corner 22. The internal angle α of the first corner 20 and the internal angle β of the second corner 22 have a mutual dependency relationship.
    [0025] In Fig. 2, that is, in the extreme surface view, the internal angle β of the second corner 22 can preferably be placed within a range that is 153o or greater and which is 179o or less, preferably within a range that is 160o or greater and that is 170oC or less. One of the reasons why the internal angle β of the second corner 22 is preferably placed at 153o or more is that the internal angle α of the first corner 20 is made smaller to some degree in such a way as to be able to obtain a cutting edge angle large enough when the cutting insert 10 is attached to the tool body. For example, in order to achieve the cutting edge angle of 45o or similar, the internal angle α of the first corner 20 does not preferably exceed 135o and, more preferably, is placed within a range that is 110o or greater and which is less than 135o. In addition, one of the reasons why the internal angle β of the second corner 22 is preferably placed at 179o or less, is to clearly define two kinds of lateral surface parts to be described later and to increase the strength of the cutting insert.
    [0026] In the cutting insert 10 of the first embodiment, the internal angle β of the second corner 22 is placed at approximately 168o. Since the internal angle β of the second corner 22 is thus placed close to 180o, in the first glimpse the cutting insert 10 appears to be formed substantially in a plate shape of a regular pentagon in the extreme surface view. On the other hand, in the present first embodiment, the internal angle α of the first corner 20 is placed at approximately 120o.
    [0027] Here, as shown in Fig. 3 and Fig. 5, a median plane M, extending in order to bisect the cutting insert 10, is defined. The median plane M extends median between the two extreme surfaces 12 and 14. The median plane M extends substantially in parallel with the two extreme surfaces 12 and 14. It should be noted that if the two extreme surfaces 12 and 14 are not substantially in parallel, for example, a plane, on the basis of which the two extreme surfaces 14 and 14 are the closest to be plane-symmetrical, should be placed as the average plane M.
    [0028] In a cross section in the median plane M of the cutting insert 10 of the first embodiment, a diameter of an inscribed circle is approximately 12.70 mm. It should be noted that the inscribed circle of the cross section is preferably defined to be tangent to five surface parts 16d defined on the peripheral surface 16 to connect the second corner 22 of the upper surface 12 and the second corner 222 of the lower surface 14 corresponding thereto. However, for ease of control of an inscribed circle dimension of the cutting insert 10 of the first embodiment, each of the surface parts 16d is preferably formed in a flat shape. The cutting insert according to the present invention can be designed in an arbitrary size.
    [0029] As described above, a plurality of cutting parts 18 is formed at the intersection part between each of the end surfaces 12 and 14 and the peripheral surface 16. Each cutting part 18 is formed between the two corresponding second corners 22. Each cutting part 18 has a first cutting edge 18a and a second cutting edge 18b. Here, each cutting part 18 still has a corner edge 18c between the first cutting edge 18a and the second cutting edge 18b to be connected thereon. In this way, each cutting part 18 can also have one or more cutting edges in addition to the two cutting edges, such as the first cutting edge 18a and the angle of the cutting edge 18b.
    [0030] On each extreme surface, a part on each side of a substantial decagon is alternatively defined as the first cutting edge 18a and the second cutting edge 18b to interpose corners 20 and 22. Therefore, the first cutting edge 18a and the second cutting edge 18b extend in different directions from each first corner 20. It should be noted that the first cutting edge 18a is configured to be able to act as the largest cutting edge when attached to the body tool, and the second cutting edge 18b is also configured to be able to act as the smaller cutting edge when it is attached to the tool body. Particularly, in the present first embodiment, the second cutting edge 18b is configured to be able to act as a finishing cutting edge (mop) ./
    [0031] Furthermore, when the cutting insert 10 is fixed on the tool body, an inclined surface 28 can be formed on an extreme surface like a front surface, and an inclined surface 30 can be formed on the peripheral surface 16 The inclined surface 28 includes an inclined surface relative to the first cutting edge 18a and an inclined surface relative to the second cutting edge 18b. However, in the cutting insert 10, as understood by the figures, a plane part of the upper surface 12 or the lower surface 14 extending from the cutting part 18 into the cutting insert 10, particularly the first cutting edge 18a, it is configured to be closer to the median plane M when the distance from the first corner 20 or the cutting edge increases, and such a part of the plane can mainly act as an inclined surface. The flank surface 30 includes a flank surface extending from the first cutting edge 18a, and a flank surface extending from the second cutting edge 18b.
    [0032] In a region in the vicinity of an outer edge portion of each of the upper surface 12 and the lower surface 14, the flat portion extending substantially oblique as described above spreads out. The flat part includes a first extreme surface part 28a relative to the first cutting edge 18a to extend from there and a second extreme surface part 28b relative to the second cutting edge 18b to extend from there. When the cutting insert 10 is fixed on the tool body, as described above, the first cutting edge 18a is configured to be able to act as the largest cutting edge and, together with it, the first extreme surface 28a is configured to be able to act as a larger sloped surface. Similarly, when the cutting insert 10 is fixed on the tool body, the second cutting edge 18b is, as described above, configured to be able to act as the smaller cutting edge and, together with it, the second cutting part. extreme surface 28b is configured to be able to act as a smaller inclined surface.
    [0033] On the peripheral surface 16, a first corner surface 16c, extending to connect the first corner 20 of the upper surface 12 and the first corner 20 of the lower surface 14, corresponding thereto, and a second corner surface 16d ( corresponding to the plane part above) extending to connect the second corner 22 of the upper surface 12 and the second corner 22 of the lower surface 14, corresponding to it, are alternately arranged. On the peripheral surface 16, moreover, the side surfaces 16a and 16b, having a relationship of being inclined approximately in different directions to each other, are respectively formed between the first corner surface 16c and the second corner surface 16d. The two side surfaces 16a and 16b are here, for ease of explanation, called a first inclined side surface and a second inclined side surface. Two species of the sloping side surfaces 16a and 16b are alternately arranged on the peripheral surface 16, and are substantially the same shape with each other. Each of the first inclined side surfaces 16a extends between the first cutting edge 18a related to the upper surface 12 and the second cutting edge 18b related to the lower surface 14, and each of the second inclined lateral surfaces 16b extends. between the second cutting edge 18b, related to the upper surface 12 and the first cutting edge 18a related to the lower surface 14. Therefore, the first sloping side surface 16a has a first side surface portion 30a extending of the first cutting edge 18a related to the upper surface 12 and a second side surface part 30b extending from the second cutting edge 18b related to the lower surface 14 formed therein, and the second inclined side surface 16b has a second part side surface 30b extending from the second cutting edge 18b relative to the top surface 12 and a first part of the surface bar end 30a extending from the first cutting edge 18a related to the bottom surface 14 formed thereon. When the cutting insert 10 is attached to the tool body, the first cutting edge 18a is configured to be able to act as a larger cutting edge as described above and, together with it, the first side surface part 30a is configured to be able to act as a main flank surface. Likewise, when the cutting insert 10 is attached to the tool body, the second cutting edge 18b is configured to be able to act as a smaller cutting edge as described above and, together with it, the second side surface part 30b is configured to be able to act as a smaller flank surface.
    [0034] As shown in Fig. 9, the cutting insert 10 of the first embodiment is a straight insert to be mounted on a tool body 52 on a cutter 50, as a rotational cutting tool to rotate in the direction of a clock around a rotational center axis of tool A, that is, a direction of the arrow R. Therefore, as shown in Fig. 2, in the side surface view, when the cutting insert 10 is seen as a substantial decagon , the first cutting edge 18a, formed on a side part on the counterclockwise side to the first corner 20, can be used as the largest cutting edge, and the second cutting edge 18b formed on a side part on the side clockwise to the first corner 20, can be used as the minor cutting edge.
    [0035] The first cutting edge 18a and the second cutting edge 18b can be respectively formed in a straight line format, but respectively not limited to it, each of them can be a cutting edge in a curved shape or an edge cutting by combining a straight line and a curved line. In addition, a scouring cutting edge (not shown) can be formed at the cutting part 18. The cutting edges 18a and 18b, respectively, can be formed to extend within a plane, but can be formed to extend as if they were a three-dimensional curve.
    [0036] It should be noted that, in the first embodiment, the first corner 20 is formed to assume roundness. In the present embodiment, a radius of curvature around the first corner 20 is made as 0.80 mm. The second corner 22 may include some degree of roundness, but is substantially formed in a straight line shape. A second corner shape 22 is defined by forming a second corner side surface 16d, that is, a flat surface (face) having a narrow width at the intersecting edge portion between the two corresponding first side surface and second side surface 16b. Such formation of the second corner side surface 16d makes it possible to reduce the possibility that an edge portion in the intersecting region between the first side slope surface 16a and the second side slope surface 16b splinter. In the first embodiment, a width of the straight shaped portion of the second corner 22 is set to 0.5 mm. However, the second corner 22 can be formed roundly as a curve.
    [0037] It should be noted that the periphery of the cutting edge of the cutting insert 10 can be made of a hard material, such as cemented carbide, cermet, ceramics, cubic boron nitride and the like, and can be formed by coating a surface of the hard material with a PVD or CVD valve enclosure film.
    [0038] The median plane M already defined extends substantially in parallel with the upper surface 12 and the lower surface 14, particularly in the present first embodiment, and substantially bisects the cutting insert 10 up and down. The upper surface 12 and the lower surface 14, each formed in a substantial decagon, are provided in the center with a fixing hole 32 formed on them to penetrate from the upper surface 12 to the lower surface 14. Here, the fixing hole 32 extends to be perpendicular to the median plane M, and a central geometric axis B of the fixing hole 32 is perpendicular to the median plane M. It should be noted that the fixing hole 32 is designed so that the upper surface 12 and the surface bottom 14, respectively, have a predetermined rotation symmetry around the central geometric axis B. This is because the cutting insert is an indexable cutting insert.
    [0039] In view of the side surface of the cutting insert 10, as shown in Figs. 3, 5 and 6, that is, when the cutting insert 10 is seen from the side of the peripheral surface 16, each of the first cutting edges 18a has an inclination part that is inclined in order to gradually become closer to the median plane M when the distance from the first related corner 20 increases. The inclination portion contributes to an inclination of the first cutting edge 18a as the major cutting edge operative when the cutting insert 10 is attached to the tool body 52. That is, this inclination is effective when the axial inclination angle is desired be placed at a positive angle. Particularly in the present first embodiment, each of the first cutting edges 18a extends linearly in order to be closer to the median plane M when the distance of the first related corner 20 increases as a whole.
    [0040] In the present embodiment, still, in view of the lateral surface of the cutting insert 10, each of the second cutting edges 18b has an inclination part that is inclined so as to gradually be closer to the median plane M, when a distance from the first related corner 20 increases. Particularly in the present first embodiment, each of the second cutting edges 18b extends in order to become closer to the median plane M when a distance from the first related corner 20 increases as a whole.
    [0041] As a result, each of the first cutting edge 18a and the second cutting edge 18b, which are adjacent to each other in a cutting part 18 and extend to interpose the first corner 20 between them, has a substantially in the form of a letter V in the side surface view. However, each of the first cutting edge and the second cutting edge of the present invention is not limited to being formed in such a substantially V-letter format. For example, a part in parallel with the median plane M can be provided on one or both of the first cutting edge and the second cutting edge. In addition, the second cutting edge can be partially or fully formed in a shape suitable for an application, such as a serrated shape or the like. In other words, according to the present invention, in the side surface view of the cutting insert, the first cutting edge is only required to have the inclination part that is inclined so as to be closer to the median plane M when the distance from the first corner increases, and the cutting edge parts can be formed in any other configuration.
    [0042] In view of the lateral surface of the cutting insert 10, an angle of inclination of the inclination part of the first cutting edge 18a exceeds 0o at the base of the median plane M and is placed within a range of 10o or less. The range of this angle of inclination is a range of general angle when tilting the major cutting edge of the cutting insert. When the cutting insert 10, having such a configuration, is fixed to the tool body 52, the axial inclination angle relative to the first cutting edge 18a ', acting as the largest cutting edge, may be greater than the cutting angle. inclination of the inclination portion of the first cutting edge. This is mainly because of two reasons, which follow.
    [0043] The first reason is that when the cutting insert 10 is attached to the cutting tool body 52, the length of the first cutting edge 18a ', acting as the longest cutting edge in the direction of the geometric axis A, is made shorter than the length of the first cutting edge 18a 'itself, due to the influence of the cutting edge angle. Since the difference in height from the cutting edge 18a 'to the middle plane M is the same and the length of the cutting edge 18a', in the direction of the geometric axis A, is made short, the same effect as that obtained in the when the angle of inclination of the cutting edge 18a 'is increased, it can be obtained. The second reason is that any angle of inclination can be established by providing a part of the plane extending substantially oblique over the extreme surface of the cutting insert 10, that is, the elevated part. For example, the axial tilt angle of the tool can be made within a range that is more than 0o and that is 40o or less. In the present embodiment, its axial inclination angle is set at approximately 20o.
    [0044] It should be noted that, in the extreme surface view of the cutting insert 10, the ratio of the length of the first cutting edge 18a to the length of the second cutting edge is allowed to be any relationship, but preferably it is made within a range from 4: 1 to 5: 2, including 4: 1 and 5: 2. In the cutting insert 10 of the present first embodiment, the ratio of the length of the first cutting edge 18a to the length of the second cutting edge is approximately 3: 1.
    [0045] Furthermore, particularly in the cutting insert 10 of the present first embodiment, the inclination of the first inclined side surface 16a and the inclination of the second inclined side surface 16b are characterized. These slopes are defined to satisfy two conditions, as follows. The first condition is that a first side surface part 30a, formed to extend from the first cutting edge 18a to the peripheral surface 16, has a part forming an obtuse internal insert angle with a defined plane passing through the first edge of cut 18a and be parallel to the median plane M. The second condition is that the second side surface part 30b, formed to extend from the second cutting edge 18b to the peripheral surface 16, has a part forming an acute internal angle of insert with a defined plane pass through the second cutting edge 18b and be in parallel with the middle plane M. It should be noted that the internal obtuse angle of the insert is preferably defined in a plane passing through the first cutting edge 18a and extending it is intended to be perpendicular to the median plane M, and in particular it is preferably defined in a defined plane to be perpendicular to the first cutting edge 18a in the extreme surface view. This is because, in general, such a cross-sectional shape is measured by a contour measuring instrument (eg, a CONTRACER). The same can be applied to the internal acute angle of the insert.
    [0046] Furthermore, in the cutting insert 10 of the present first embodiment, the first sloping side surface 16a and the second side surface 16b are designed to satisfy the third condition. The third condition is that the first side surface part 30a, relating to one of the two end surfaces 12 and 14, is in the same plane with the corresponding second side surface part 30b related to the other of the two extreme surfaces 12 and 14.
    [0047] Here, the cross-sectional views of Fig. 7 and Fig. 8 will be referred to. The cross-sectional view of Fig. 7, taken along line VII-VII of Fig. 2, is a cross-sectional view of the cutting insert 10 in a defined plane passing through the first cutting edge 18a, related to the upper surface 12, that is, the first extreme surface and the first side surface portion 30a related thereto being perpendicular to the median plane M, as well as being perpendicular to the first cutting edge 18a in the extreme surface view. In addition, the cross-sectional view of Fig. 8, taken along line VIII-VIII in Fig. 2, is a cross-sectional view of the cutting insert 10 in a defined plane passing through a second cutting edge 18b related to the upper surface 12, that is, the first extreme surface and the second side surface part 30b related thereto being perpendicular to the median plane M, as well as being perpendicular to the second cutting edge 18b of the extreme surface view. Here, according to the third condition, Fig. 7 is also a cross-sectional view of the cutting insert 10 in a defined plane passing through the second cutting edge 18b related to the bottom surface 14, that is, the second surface extreme and second side surface part 30b related thereto being perpendicular to the median plane M, as well as being perpendicular to the second cutting edge 18b of the extreme surface view. In addition, Fig. 8 is also a cross-sectional view of the cutting insert 10 in a defined plane passing through the first cutting edge 18a related to the lower surface 14, that is, the second extreme surface and the first part of lateral surface 30a related thereto being perpendicular to the median plane M, as well as being perpendicular to the first cutting edge 18a of the extreme surface view.
    [0048] In the cross-sectional view of Figs. 7 and 8, the first side surface part 30a extending from the first cutting edge 18a is angled outwards leading out of the first cutting edge 18a, and forms an obtuse internal insertion angle y with each of the planes f1 and defined f3 pass through the first cutting edge 18a and extend in parallel with the median plane M. On the other hand, in the cross-sectional view of each of Fig. 7 and Fig. 8, the second side surface part 30b extending from the second cutting edge 18b, it is angled inwardly towards the second cutting edge 18b, and forms an acute internal insert angle δ with each of the defined planes f2 and f4 passing through the second cutting edge 18b and extend in parallel with the median plane M. Furthermore, in the first embodiment, assuming that the planes f5 and f6, perpendicular to the median plane M, are defined, the first sloping side surface 16a and a second sloping side surface 16, re respectively, they are inclined at an angle ε (= 90o - δ) from the planes f5 and f6, respectively, as a whole.
    [0049] The second side surface part 30b of each of the sloping side surfaces 16a and 16b, having such a characteristic configuration, contributes to forming a positive free angle on the flank surface of a second operative cutting edge 18b ', when the cutting insert 10 is attached to the tool body 52. The positive free angle can be the angle ε, for example.
    [0050] The ε angle is preferably within a range that is 2 ° or greater and which is 25 ° or less. In other words, the acute internal angle of insert δ can be within a range that is 65o or greater and which is 88o or less. In a case where the angle ε is less than 2 °, the difference in cutting performance between cutting insert 10 and a so-called negative type cutting insert is made small, and a degree of contribution to making an angle of the surface of flank on the second cutting edge 18b 'being positive is greatly reduced. Therefore, the angle ε is preferably 2 or more. In addition, in a case where the angle ε exceeds 25o, since the tool angle at the periphery of the second edge 18b is excessively acute, the likelihood that a problem, such as chipping or damage, will occur at the second cutting edge and in its periphery it is rapidly increased. Therefore, the angle ε is preferably 25o or less. In the cutting insert 10 of the present first embodiment, the angle ε is established to be approximately 5o. It should be noted that, in the first embodiment, each of the first sloping side surface 16a and the second sloping side surface 16 is formed as a substantially flat surface, but not limited to this, for example, one or both of them may have one or more curved surfaces midway.
    [0051] The cutting insert 10, configured as described above, is separably fixed on the tool body 52. A cutter 50, like a cutting tool on which the cutting insert 10 is fixed on the tool body 52, is illustrated from Fig. 9 to Fig. 14. The cutting insert 10 is fixed in an insert receiving cavity or an insert seat 53 of the tool body 52. The cutting insert 10 is retained in the insert seat 53 of the tool body tool 52 when a screw 54 is screwed into a threaded hole (not shown) of the insert seat 53 through its fixing hole 32 in a state being disposed in the insert seat 53.
    [0052] Here, Fig. 11 and Fig. 12, particularly Fig. 12, will be referred to. As understood by these figures, in the cutting insert 10 fixed on the tool body 52, the first cutting edge 18a 'and the second cutting edge 18b', connected through a first corner 20 ', positioned at a feed end , can act as cutting edges. The first cutting edge 18a 'is designed to act as the major cutting edge and the second cutting edge 18b' to act as the minor cutting edge, particularly as a finishing edge here. An angle of the cutting edge £ of the cutter 50, with respect to the first operative cutting edge 18a ', is large and is set at 45 ° or more.
    [0053] Furthermore, in the present first embodiment, as shown in Fig. 14, the cutting insert 10 is fixed on the tool body 52 without becoming a so-called negative geometry. In doing so, in the cutting insert 10 fixed on the tool body 52, a positive axial inclination angle is ensured and a positive free angle is also ensured. It should be noted that, in Fig. 14, for ease of understanding, the cutting insert 10 of the cutter body 52, positioned on the back side of the sheet, is omitted in the illustration.
    [0054] The cutting insert 10 of the present first embodiment has the sloping side surfaces 16a and 16b as described above. Therefore, when the cutting insert 10 is attached to the cutting tool body 52, it is not necessary to arrange the cutting insert 10 to make the apparent axial inclination angle of the cutting insert 10, in a direction of the rotational tool axis. A, be in a so-called negative geometry. That is, the cutting insert 10 can be attached to the tool body 52 to have a positive free angle of, for example, 20 ° or less, without taking particular measures. Even if the cutting insert is particularly arranged on the tool body in a negative geometry, it is permissible for the cutting insert to be inclined at 2 ° or less, for example, and it is not necessary to have a large negative angle.
    [0055] Since the first cutting edge 18a is inclined to be closer to the median plane M when a distance from the first center 20 increases, a large positive axial inclination angle of the cutter 50 is easily and precisely ensured because of a relation to a shape of the inclined surface on the cutting tool 10. On the other hand, to ensure the positive free angle with respect to the first cutting edge 18a, the cutting insert 10 is arranged in the tool body 52, so that an angle of apparent radial inclination becomes a so-called negative angle. That is, the cutting insert 10 is arranged on the tool body 52, so that an extreme surface, directed towards the front, is directed outwards in a rotational direction of the tool. Therefore, it is easy to position the cutting insert 10 on the insert seat 53 of the tool body 52, and it is difficult for a clamping screw 54 and a screwdriver (not shown) (eg, a star wrench) to clamp the screw 54 to interfere with the tool body 52. Therefore, in the tool body 52, a chip discharge groove (chip cavity) 56, provided on the periphery of the insert seat 53, where the cutting insert 10 can be fixed, it can be formed only in consideration of the chip discharge characteristics. Accordingly, the chip discharge groove 56 is formed to be of a size only in consideration of the chip discharge characteristics.
    [0056] The configuration that an extreme surface on the front side of the cutting insert is thus directed outwards towards the rotational direction of the tool is advantageous in a case where the cutting insert is formed of a type of multi-edges for increase the processing efficiency of the rotational cutting tool. Not illustrated, for example, in a case of using the conventional cutting insert having an inscribed circle of the order of 12.70 mm on the rotational cutting tool having a cutter diameter of 100 mm, the number of edges of the insert is seven in the maximum. On the other hand, in a case of arranging the cutting insert according to the present invention in the tool body, so that an angle of radial inclination becomes approximately 4o in a negative angle, it is found that it is possible to increase the number of edges of the cutting insert according to the present invention to 11. In this way, as compared with the conventional cutting tool, an improvement in feeding is possible by 60% or more in the cutting tool equipped with the cutting insert according to with the present invention, and, according to the present invention, the processing efficiency of the cutting tool can be greatly increased.
    [0057] The cutting insert 10 of the present embodiment is formed in a substantially decagonal plate shape, however, for example, it can be changed substantially to a twelve-sided polygonal plate shape, a sixteen-sided polygonal plate shape or similar. However, as described above, the two kinds of side surfaces 16a and 16b are formed and the two surfaces are substantially combined. Therefore, the number of sides of a polygon is preferably established in even numbers. The purpose of increasing the number of sides of the substantial polygon is to increase the number of use corners.
    [0058] With respect to the cutting insert 10 of the present embodiment, the upper surface and the lower surface can be reserved and both its surfaces can be used in this way. When the upper surface and the lower surface are inverted, the cutting insert 10 has the same shape. That is, when a cross section of the cutting insert 10 is taken along the median plane M, the shape of the cross section is substantially a regular decagon. Not limited to a case of the present embodiment, the cutting insert of a substantially polygonal plate shape according to the present invention will have a regular polygon in a cross section of the median plane M.
    [0059] A method of manufacturing the cutting insert 10 in the present embodiment is basically the same as the manufacturing method of the conventional cutting insert. The peripheral surface 16 can be manufactured by grinding processing, for example. However, in case of forming the cutting insert 10 by forming and sintering the powder pressure without grinding the peripheral surface 16, a specific metal mold and a powder pressure forming machine become necessary. Specifically, when a specific metal mold called a split mold is used and a compact is removed from the metal mold after pressure is formed, the metal mold is divided to remove the compact. It should be noted that, even in this case, the method of manufacturing the cutting insert 10 in the present embodiment is the same as the method of manufacturing the conventional cutting insert other than the metal mold and the powder pressure forming machine .
    [0060] The cutting insert, as described above, is separately attached to the tool body on the cutting tool. The cutting tool is separately attached to a machine tool, such as a machining center or the like. The cutting tool provides movement relative to a workpiece to perform the cut processing. It should be noted that the cutting tool 50 can be used even on the machine tool to rotate the workpiece, such as a lathe or the like, however when the cutting tool 50 is used as the rotary tool on the machine tool, such as the machining center or similar, it can provide more benefits in the characteristics of the cutting insert 10 and the cutting tool 50. However, next, a cutting insert and a cutting tool, according to each of the different embodiments of the present invention, which are used in a rotating workpiece, will be explained.
    [0061] Next, a second embodiment according to the present invention will be explained with reference to Fig. 15 to Fig. 18C. The second embodiment relates to a boring tool of the second embodiment, the characters corresponding to the characters used in the explanation above of the first embodiment are given to the components corresponding to the components of the first embodiment.
    [0062] A cutting insert 110 according to the second embodiment is provided with characteristics similar to those of cutting insert 10 above. To mainly clarify a corresponding relationship between the components of the cutting insert 10 of the first embodiment and the components of the cutting insert 110 of the second embodiment, the cutting insert 110 will be simply explained below.
    [0063] The cutting insert 110 is provided with an upper surface 112 and a lower surface 114 as two opposite extreme surfaces and a peripheral surface 116 extending between them. A plurality of cutting parts 118 is formed at the intersection part between the upper surface 112 or the lower surface 114 and the peripheral surface 116. Each cutting part 11 is formed between corresponding second corners 122 and has a first cutting edge 118 and a second cutting edge 118b. The first cutting edge 118a has a portion extending to approach the median plane when a distance from a corresponding first corner 120 increases. A first extreme surface part 128a and a first lateral surface part 130a, relative to the first cutting edge 118a, are formed, and a second extreme surface part 128b and a second lateral surface part 130b, relative to the second cutting edge 118b, are formed. It should be noted that here the cutting insert 110 is indexable and the median plane M is perpendicular to a central geometric axis B of a fixing hole 132.
    [0064] In the extreme surface view (refer to Fig. 16A), two kinds of corners 120 and 122, having different internal angles, are alternately formed on the extreme surface. The internal angle α of the first corner 120 is smaller than the internal angle β of the second corner 122 and, here, the internal angle β of the second corner 122 is established within a range that is 153o or greater and which is 179o or less . The peripheral surface 116 is provided with two kinds of sloping side surfaces 116a and 116b, a first corner side surface 116c extending to connect the first corners 120 of both extreme surfaces and alternately arranged between them, and a second surface corner side 116d also extending to connect the second corners 122 of both extreme surfaces. It should be noted that, in the present second embodiment, a width of the second corner side surface 116 is extremely narrow and is simply illustrated by lines in the figure.
    [0065] Each of the first sloping side surfaces 116a extends between the first cutting edge 118a, related to the upper surface 112, and the second cutting edge 118b, related to the lower surface 114, and each of the second sloping side surfaces 116b extends between the second cutting edge 118b, related to the top surface 112, and the first cutting edge 118a, related to the bottom surface 114. Therefore, on the first sloping side surface 116a, a first side surface part 130a, extending from the first cutting edge 118a, related to the top surface 112, and a second side surface part 130b, extending from the second cutting edge 118b, related to the bottom surface 114, are formed. On the second sloping side surface 116b, a second side surface part 130b, extending from the second cutting edge 118b, related to the top surface 112, and a first side surface part 130a, extending from the first cutting edge 118a, related to the bottom surface 114, are formed. When the cutting insert 110 is attached to the tool body 152, the first cutting edge 118a and the second cutting edge 118b, respectively, are configured to be able to act as the larger cutting edge and the cutting edge of face. As a result, the first side surface part 130a is configured to be able to act as a larger flank surface on a corresponding operative cutting edge 118a ', and the second side surface part 130b is configured to be able to act as a flank surface of the face cutting edge at a corresponding second operative cutting edge 118b '. It should be noted that the first operating cutting edge 118a 'and the second operating cutting edge 118b' are adjacent through a first corner 120 ', positioned at a forward end.
    [0066] In addition, the first tilt side surface 116a and the second tilt side surface 116b are configured to satisfy not only the first condition above and the second condition above, but also the third condition above, as similar to the first side surface slope 16a and the second sloping side surface 16b of the cutting insert 10 of the first embodiment (refer to Figs. 7 and 8). Each inclination angle of the inclination side surfaces 116a and 116b is within the range explained in the first embodiment above.
    [0067] The cutting insert 110, having such a configuration, is separably fixed in an insert seat 153 of a tool body 152 by a screw 154. A boring tool 150 in which the cutting insert 110 is fixed on the tool body 152 can be used on a lathe and is generally used to process a rotating workpiece. Therefore, the boring tool 150 itself does not rotate regularly, but the present invention does not exclude a case where the boring tool 150 itself is used to rotate.
    [0068] Even the cutting insert 110 and the boring tool 150 can also obtain the operation and effect explained with respect to the cutting insert 10 and the cutter 50, in a strip without conflict between them.
    [0069] Furthermore, the cutting insert 110 and the boring tool 150, each having such a configuration, are particularly advantageous in a case where a hole to be processed has a small diameter. In a case where the hole to be processed has a small hole, a general negative type of cutting insert, both of which surfaces can be used, is regularly fixed on the tool body, so that an angle of lateral inclination makes it a large negative slope angle is provided to ensure a protrusion of the inner peripheral surface of the hole. However, since the cutting insert 110 has the peripheral surface 116 with the above configuration, a positive free angle is suitably ensured in an area of interference with the internal peripheral surface of the hole with the boring tool 150, particularly in the second part side surface 130b acting as the flank surface of the second operating cutting edge 118b ', without depending on such a fixing structure of the cutting insert 110. Therefore, in the cutting tool 110 and in the boring tool 150, the resistance of cutting can be reduced.
    [0070] Next, a third embodiment will be explained with reference to Fig. 19 to Fig. 22C. The third embodiment differs mainly in one aspect of the cutting insert configuration from the second embodiment. Therefore, in the following explanation of the third embodiment, the characters corresponding to those used in the explanation above the first and second embodiments, are given to the components corresponding to those of the first and second embodiments.
    [0071] A cutting insert 210 according to the third embodiment, is formed in a substantially rhombic plate shape and differs at this point from the cutting insert 110 according to the second embodiment. These embodiments are approximately in common with the other features.
    [0072] Specifically in the cutting insert 210 also, the cutting parts 218 are formed at the intersection part between each of the extreme surfaces 212 and 214 and a peripheral surface 216. The first corners 220 and the second corners 222 are alternately arranged in each of the extreme surfaces 212 and 214. The first corner 220 has an internal angle α less than an internal angle β of the second corner 222 of the extreme surface view. Each cutting part 218 extends between the second corners 222 and has a first cutting edge 218a and a second cutting edge 218b. In particular, the first cutting edge 218b has a portion extending to approach the median plane M when a distance from the first corner 220 increases. It should be noted that here the cutting insert 210 is indexable, and the median plane M is perpendicular to a central geometric axis B of a fixing hole 232.
    [0073] Furthermore, the peripheral surface 216 is provided with two kinds of sloping side surfaces 216a and 216b, a first corner side surface 216c extending to connect to the first corners 220 of both extreme surfaces and alternately arranged between them, and a second corner side surface 216d also extending to connect to the second corners 222 of both end surfaces. In addition, on the first sloping side surface 216a, a first side surface part 230a, extending from the first cutting edge 218a, related to the top surface 212, and a second side surface part 230b, extending from the second cutting edge 218b, related to the bottom surface 214, are formed. On the second sloping side surface 216b, a second side surface part 230b, extending from the second cutting edge 218b, related to the top surface 212, and a first side surface part 230a, extending from the first cutting edge 218a, related to the bottom surface 214, are formed.
    [0074] Furthermore, an inclination of each of the inclined side surfaces 216a and 216b of the peripheral surface 216, related to each of the cutting edges 218a and 218b, is similar to an inclination of each of the inclined lateral surfaces 16a , 16b, 16a and 16b of the first and second embodiments. These inclination angles are within the angle range explained in the first embodiment above.
    [0075] The cutting insert 210 and a boring tool 250, wherein the cutting insert 210 is separably fixed to an insert seat 253 of a tool body 252 by a screw 254 of the third embodiment, can achieve the operation and effect similar to those of the cutting insert 110 and the boring tool 150, in which the cutting insert 110 is separably fixed in the second embodiment.
    [0076] As described above, the three dimensions of the present inventions are explained, however other embodiments are also included in the present invention. For example, in the cutting insert of the first embodiment, the chip breaker is formed in a relatively simple shape. However, for example, the chip breaker can be formed into a complicated three-dimensional shape. In addition, it is possible to adopt several kinds of existing known techniques, such as a provision of concavity and convexity on the flank surface as a notch. Furthermore, in the first embodiment, the strip-shaped surface, having a narrow width, i.e., the high face is provided along the cutting edge. However, such a high face is not necessarily required to be provided. The number of the insert seats formed in the tool body can be set to one or any number. In addition, in each embodiment, the fixing hole is provided in the cutting insert and the cutting insert is fixed to the tool body by the screw. However, the present invention allows a cutting insert without a fixing hole and a configured cutting insert to be fixed to the tool body by various kinds of mechanical fastening means and a cutting tool to which the cutting insert is attached can included in the present invention.
    [0077] The present invention is explained by the aforementioned embodiments and their modifications with some degrees of concreteness, however the present invention is not limited to them. It is to be understood that, with respect to the present invention, various changes and changes can be made without deviating from the spirit and scope of the invention of the related claims. That is, the present invention includes any variations, applications and equivalents covered by the designs of the present invention, defined by the claims.
    权利要求:
    Claims (6)
    [0001]
    1. Boring tool (150, 250), characterized by the fact that it comprises: a tool body (152, 252); a cutting insert (10, 110, 210); and, at least one insert seat (153, 253) formed in the tool body (152, 252), the insert seat (153, 253) being configured to mount the cutting insert (10, 110, 210); wherein the cutting insert (10, 110, 210) comprises: two opposite extreme surfaces (12, 14; 112, 114; 212, 214); a peripheral surface (16, 116, 216) extending between the two extreme surfaces (12, 14; 112, 114; 212, 214); and, a cutting edge formed at the intersection part of each extreme surface (12, 14; 112, 114; 212, 214) and at the peripheral surface (16, 116, 216), the cutting edge including a plurality of parts of cutting (18, 118, 218), each cutting part including a first cutting edge (18a, 118a, 218a) and a second cutting edge (18b, 118b, 218b); where: in an extreme surface view of the cutting insert, the first corners (20, 120, 220) and the second corners (22, 122, 222), which differ in their internal angles, are alternately formed on each extreme surface (12, 14; 112, 114; 212, 214), the internal angle α of the first corner (20, 120, 220) being smaller than the internal angle β of the second corner (22, 122, 222); each cutting part (18, 118, 218) is located between the two second corners (22, 122, 222) and in each cutting part (18, 118, 218), the first cutting edge (18a, 118a, 218a ) and the second cutting edge (18b, 118b, 218b) extends from the first common corner (20, 120, 220) in different directions; a medium plane M, which extends between the two extreme surfaces (12, 14; 112, 114; 212, 214), is defined by bisecting the cutting insert; each first cutting edge (18a, 118a, 218a) has a portion extending closer to the median plane M, when a distance from a corresponding first corner (20, 120, 220) increases; a first lateral surface part (30a, 130a, 230a) extending on the peripheral surface (16 116, 216) of each first cutting edge (18a, 118a, 218a) has a part forming an internal obtuse angle of insertion y with a plane (fl, f3) passing through the first cutting edge (18a, 118a, 218a) and being parallel to the median plane M; and, a second side surface part (30b, l30b, 230b), extending over the peripheral surface (l6 ll6, 2l6) of each second cutting edge (l8b, ll8b, 2l8b), has a part forming an acute angle internal insert δ with a plane (f2, f4) passing through the second cutting edge (l8b, ll8b, 2l8b) and being parallel with the median plane M; wherein in the cutting insert (l0, ll0, 2l0), attached to the tool body (52 l52, 252), each of the first and second extreme surface parts (28a, 28b; l28a, l28b; 228a, 228b) extends one of the first and second operating cutting edges (l8a ', l8b'; ll8a ', ll8b'; 2l8a ', 2l8b') on a related extreme surface, act as an inclined surface, and each of the first and second parts of lateral surface (30a, 30b; l30a, l30b; 230a, 230b) extending from the first and second operating cutting edges (l8a ', l8b'; ll8a ', ll8b'; 2l8a ', 2l8b'), act as a surface flank; and, a first operative cutting edge (l8a ', ll8a', 2l8a ') acts as a larger cutting edge; and, a second operative cutting edge (l8b ', ll8b', 2l8b ') acts as a finishing edge.
    [0002]
    2. Boring tool (150, 250) according to claim 1, characterized by the fact that the acute internal angle of insert δ lies within the range that is 65o or greater and which is 88o or less.
    [0003]
    3. Boring tool (150, 250) according to claim 1 or 2, characterized by the fact that the internal angle β of the second corner (22, 122) lies within the range that is 153o or greater and which is 179o or less .
    [0004]
    Boring tool (150, 250) according to any one of claims 1 to 3, characterized by the fact that each first side surface part (30a, 130a, 230a) of the related cutting insert (10, 110, 210) with an extreme surface of the two extreme surfaces (12, 14, 112, 114, 212, 214) is in the same plane as a corresponding second side surface part (30b, 130b, 230b) related to the other extreme surface of the two extreme surfaces (12, 14, 112, 114, 212, 214).
    [0005]
    5. Boring tool (150, 250) according to claim 4, characterized by the fact that the cross-sectional shape of the cutting insert (10) of the median plane is a regular decagon.
    [0006]
    6. Boring tool (150, 250) according to claim 1, characterized by the fact that it is a rotary cutting tool.
    类似技术:
    公开号 | 公开日 | 专利标题
    BR112013006948B1|2021-01-19|boring tool
    JP4633468B2|2011-02-23|Tangential cutting inserts and milling cutters
    US6929429B2|2005-08-16|Milling tool and cutting insert therefor
    KR101588919B1|2016-01-26|Cutting tool and cutting insert therefor
    US9457413B2|2016-10-04|Cutting insert and rotary cutting tool
    KR101978525B1|2019-05-14|Toolholder for holding a plurality of types of cutting inserts and cutting tool including such a toolholder
    US20120301235A1|2012-11-29|Cutting Insert and Cutting Tool
    JP4104661B2|2008-06-18|Insert for cutting
    BR112014033023B1|2020-09-15|REVERSIBLE ORIENTABLE CUTTING INSERT, AND, ROTATING CUTTING TOOL
    KR20100016472A|2010-02-12|Cutting insert cutting eight ways, and tool holder for same
    EP2431115B1|2018-02-28|Cutting insert and indexable face milling cutter
    CN107000082B|2020-03-13|Cutting insert and cutting edge replaceable rotary cutting tool
    RU2630113C2|2017-09-05|Cutter and its cutting plate
    US20170341160A1|2017-11-30|Cutting insert and drilling tool
    US10384278B2|2019-08-20|Square-shaped cutting insert having curved secondary and corner cutting edges, and rotary cutting tool
    CN109328122B|2020-10-09|Cutting tool and triangular indexable cutting insert therefor
    WO2015030183A1|2015-03-05|Cutting insert and cutting edge-replaceable cutting tool
    US11229960B2|2022-01-25|Cutting insert and shoulder milling tool
    US20200254540A1|2020-08-13|Rotary cutting body having insert pocket with seat surface provided with a plurality of abutment elements and rotary cutting tool
    US20200368834A1|2020-11-26|Cutting insert and rotary cutting tool
    US20200368823A1|2020-11-26|Cutting insert having lower anti-slip recess, insert holder and cutting tool
    US20190366452A1|2019-12-05|Cutting insert and shoulder millng tool
    同族专利:
    公开号 | 公开日
    EP2623242A1|2013-08-07|
    BR112013006948A2|2016-07-26|
    US9022700B2|2015-05-05|
    WO2012043579A1|2012-04-05|
    US20130129430A1|2013-05-23|
    JPWO2012043579A1|2014-02-24|
    EP2623242A4|2017-10-11|
    CN103124609B|2015-08-19|
    JP5541366B2|2014-07-09|
    CN103124609A|2013-05-29|
    RU2013113587A|2014-11-10|
    RU2539277C2|2015-01-20|
    EP2623242B1|2021-08-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3289271A|1964-10-13|1966-12-06|Willeys Carbide Tool Co|Indexable cutting inserts|
    DE69502808T2|1994-01-14|1998-10-01|Sandvik Ab|INDEXABLE MILLING INSERT AND MILLING HEAD FOR IT|
    JP3180604B2|1995-03-10|2001-06-25|三菱マテリアル株式会社|Indexable inserts and indexable cutters|
    IL118797A|1996-07-05|1999-10-28|Iscar Ltd|Cutting insert|
    JP3775321B2|2002-03-20|2006-05-17|三菱マテリアル株式会社|Throw-away inserts and throw-away cutting tools|
    JP3951766B2|2002-03-20|2007-08-01|三菱マテリアル株式会社|Throw-away inserts and throw-away cutting tools|
    DE10317760B4|2003-04-17|2005-08-25|Walter Ag|Milling tool and cutting plate for such|
    IL160223A|2004-02-04|2008-11-26|Carol Smilovici|Double-sided cutting insert and milling cutter|
    IL169491A|2005-06-30|2009-06-15|Carol Smilovici|Cutting insert|
    JP2007021622A|2005-07-14|2007-02-01|Tungaloy Corp|Tip and milling tool|
    SE529068C2|2005-09-28|2007-04-24|Seco Tools Ab|Milling inserts and milling tools|
    KR100886455B1|2006-12-27|2009-03-04|한국야금 주식회사|Cutting insert for high-efficient cutting|
    IL182100A|2007-03-21|2010-11-30|Taegutec India Ltd|Cutting insert for a milling cutter|
    IL182343D0|2007-04-01|2007-07-24|Iscar Ltd|Cutting insert and tool for milling and ramping at high feed rates|
    SE532742C2|2008-05-13|2010-03-30|Sandvik Intellectual Property|Milling inserts with bend inclined at moderate angle|
    SE533269C2|2008-12-17|2010-08-03|Sandvik Intellectual Property|Double-sided, indexable flat cutter|
    EP2412462B1|2009-03-27|2015-05-13|Kyocera Corporation|Cutting insert, cutting tool, and method of cutting material to be cut using the cutting tool|
    WO2011001939A1|2009-06-29|2011-01-06|京セラ株式会社|Cutting insert, cutting tool, and manufacturing method for cut product using the same|
    JP2013006221A|2009-10-13|2013-01-10|Mitsubishi Materials Corp|Cutting insert and rotating tool with replaceable blade edge|
    US8573905B2|2012-03-22|2013-11-05|Iscar, Ltd.|Triangular cutting insert and cutting tool|KR20130024903A|2010-05-06|2013-03-08|가부시키가이샤 탕가로이|Cutting insert, and blade tip replacement type cutting tool|
    AT12630U1|2011-08-26|2012-09-15|Ceratizit Austria Gmbh|DOUBLE-SIDED CUTTING INSERT FOR MILLING|
    US9475134B2|2011-12-19|2016-10-25|Iscar, Ltd.|Cutting insert and cutting tool|
    KR101431891B1|2012-02-08|2014-08-26|대구텍 유한회사|A cutting insert having eight main cutting edges and wiper edges and a cutting tool having the same|
    DE102012104082A1|2012-05-09|2013-11-14|Walter Ag|Indexable insert for shoulder cutters|
    JP6014427B2|2012-09-03|2016-10-25|日本特殊陶業株式会社|Cutting insert and cutting tool using the same|
    JP2014046435A|2012-09-03|2014-03-17|Ngk Spark Plug Co Ltd|Cutting insert and cutting tool using the same|
    EP2893995B1|2014-01-08|2019-03-27|Sandvik Intellectual Property AB|A metal cutting insert and a milling tool|
    EP2893997B1|2014-01-08|2019-03-13|Sandvik Intellectual Property AB|A milling tool|
    US10022803B2|2014-04-22|2018-07-17|Tungaloy Corporation|Cutting insert having constant-width wiper surface and cutting tool|
    USD744557S1|2014-05-12|2015-12-01|Sumitomo Electric Hardmetal Corp.|Cutting insert|
    JP5888656B2|2014-06-02|2016-03-22|住友電工ハードメタル株式会社|Cutting insert and milling cutter|
    EP3025813B1|2014-11-28|2020-04-08|Sandvik Intellectual Property AB|A tool for chip removing machining and a cutting insert|
    KR101717279B1|2015-08-28|2017-03-16|한국야금 주식회사|Cutting insert and cutting tool for mounting the same|
    JP6696181B2|2016-01-13|2020-05-20|三菱マテリアル株式会社|Cutting inserts and replaceable cutting tools|
    AT15155U1|2016-02-26|2017-01-15|Ceratizit Austria Gmbh|peeling plate|
    US9961757B2|2016-05-13|2018-05-01|Ion Beam Applications S.A.|Peripheral hill sector design for cyclotron|
    WO2018012463A1|2016-07-11|2018-01-18|京セラ株式会社|Cutting insert, cutting tool, and method for producing machined object|
    USD854063S1|2016-08-26|2019-07-16|Sumitomo Electric Hardmetal Corp.|Cutting tool|
    JP1581914S|2016-10-26|2017-07-24|
    CN106735353B|2016-12-07|2018-11-06|株洲钻石切削刀具股份有限公司|A kind of cutting tip and cutting tool|
    CN106513724B|2016-12-07|2018-11-06|株洲钻石切削刀具股份有限公司|Cutting tip and cutting tool|
    US10384278B2|2017-10-09|2019-08-20|Iscar, Ltd.|Square-shaped cutting insert having curved secondary and corner cutting edges, and rotary cutting tool|
    US11241747B2|2017-10-16|2022-02-08|Iscar, Ltd.|Cutting tool and undersized bore-less indexable insert therefor|
    EP3848136A1|2020-01-10|2021-07-14|Palbit S.A.|Double-sided turning insert|
    RU2759490C1|2021-06-28|2021-11-15|Нина Алексеевна Корюкина|Cutting plate for a milling cutter and milling cutter|
    法律状态:
    2018-12-26| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-09-17| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-07-07| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2020-12-22| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-01-19| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 27/09/2011, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2010214801|2010-09-27|
    JP2010-214801|2010-09-27|
    PCT/JP2011/072111|WO2012043579A1|2010-09-27|2011-09-27|Cutting insert and cutting tool|
    [返回顶部]