• 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, cutting tool, and cutting tool body a cutting insert has first and second polygonal end surfaces which are connected by a peripheral side surface, each end surface defining first and second end planes, respectively. the peripheral lateral surface has first peripheral lateral portions alternating in the circumferential direction with second peripheral lateral portions. the first peripheral side portions are inverse copies of the second peripheral side portions. each peripheral side portion includes first and second subfaces which form different angles with the first and second end planes. the first and second subfaces intersect with each other between the first and second end planes to form a line that is parallel to the first and second end planes.
    公开号:BR112014014283B1
    申请号:R112014014283-1
    申请日:2012-11-20
    公开日:2021-03-30
    发明作者:Amir Satran；Evgeny TULCHINSKY
    申请人:Iscar Ltd；
    IPC主号:
    专利说明:

    Field of the Invention
    [0001] The present invention relates to a rotary metal cutting tool and a cutting insert that can be reversibly indexed, for metal cutting processes in general, and for milling operations in particular. Fundamentals of the Invention
    [0002] Metal cutting tools used in milling operations, including cutting inserts that are removably attached to a cutting body, are long since they provide a suitably rigid material, ie cemented carbide, in the vicinity of the cutting edge. cutting, where the cutting body, made from a less rigid material, can be reused followed by the provision of a worn or damaged cutting insert.
    [0003] Cutting inserts are fixed inside insert receiving cavities located on the periphery of the tool body, to hold and support cutting inserts both in the axial and in the radial direction during operation (for example, milling operation).
    [0004] U.S. Patent Number 3,541,655 issued to Stier, and entitled "Indexable and Reversible Cutting Inserts", is directed to a cutting insert with two parallel unequal polygonal end faces. The end faces are rotated with respect to each other. A trapezoidal side face extends between each side one of the polygonal end faces and a respective side of the other end face. Each of the two adjacent side faces is made up of two opposite trapezoids. Each trapezoidal side face forms an acute angle with one of the end faces, while forming a complementary obtuse angle with the other end face.
    [0005] U.S. Patent Number 7,037,051 issued to Wermeister, and entitled "Cutting Insert for Turning and Milling", is directed to a cutting insert with first and second polygonal shaped main faces arranged substantially parallel to each other. A side face structure interconnects the first and second main faces to define a peripheral edge. The main faces include projections extending towards the peripheral edge. Each projection is formed by a portion of the first main surface, which defines a relief surface; a portion of the side face structure, which defines an inclined surface; and a portion of the peripheral edge, which defines a cutting edge. The cutting insert includes support surfaces defined by a portion of the second main face, and portions of the lateral surface structure different from the inclined surface.
    [0006] U.S. Patent Number 5,957,629 issued to Hessman, and entitled "Fine Milling Cutting Insert", is intended for a two-sided milling cutting insert. The insert includes two parallel main surfaces that are turned 90 ° with respect to each other. Each main surface includes four operative cutting corners. At each cutting corner there are two beveled surfaces that are angled in relation to the plane of the main surface. In addition, four lateral surfaces of the insert are angled extending between the main surfaces.
    [0007] U.S. Patent Number 4,294,566 issued to Boone, and entitled "Eight Edge Positive Chip Control Insert", targets a cutting insert with eight positive cutting edges and a rectangular prismatic configuration. The insert has a pair of opposing primary faces, and four rectangular side faces each having a pair of coplanar plains at opposite corners of it, for the positive location and attachment of the insert. Each side face also has a laterally opposite pair of positive beveled facets formed therein, which intersect the respective primary faces at an inward slope to define neutral cutting edges for the insert. An elongated groove extends intermediate to the chamfered facets of each side face parallel to the neutral cutting edges.
    [0008] It is an objective of the present invention to provide an improved cutting insert that can be reversibly indexed and the cutting tool thereof, the cutting insert having a plurality of cutting edges, which can be employed in a positive and axial inclination. a negative axial inclination in relation to a workpiece. Summary of the Invention
    [0009] In accordance with the present invention, a cutting insert which can be reversibly indexed having a geometric insert axis is provided, and comprising: a first polygonal shaped end surface that defines a first end plane and a second polygonal shaped end surface that defines a second end plane, the first and second end planes being parallel to each other; a peripheral side surface extending between the end surfaces, the peripheral side surface including first peripheral side portions alternating in the circumferential direction with second peripheral side portions; a first edge formed along the intersection of the first end surface with the peripheral side surface, the first edge comprising a plurality of first cutting edges alternating with a plurality of second cutting edges; a second edge formed along the intersection of the second end surface with the peripheral side surface, the second edge comprising a plurality of first cutting edges alternating with a plurality of second cutting edges; wherein: each of the first peripheral side portions comprises a first subface which forms a first internal insert angle with the first end plane and a second subface which forms a second acute internal insert angle with the second end plane, the first subface and the second subface of each first peripheral side portion that intersects in a first line which is a first distance from the first end plane and a second distance from the second end plane; each of the second peripheral side portions comprises a first subface which forms a first internal insert angle with the second end plane and a second subface which forms a second acute internal insert angle with the first end plane, the first subface and the second subface of each second peripheral side portion that intersects on a second line which is a first distance from the second end plane and a second distance from the first end plane.
    [00010] According to another embodiment of the present invention, a reversible indexable cutting insert is provided, comprising: a first polygonal shaped end surface and a second polygonal shaped end surface, identical and parallel to the first end surface, the second end surface being rotated with respect to the first end surface; a peripheral side surface extending between the end surfaces, the peripheral side surface including a plurality of peripheral side portions; two continuous circumferential cutting edges, each circumferential cutting edge formed along the entire intersection of each end surface with the peripheral side surface, each circumferential cutting edge comprising a plurality of first cutting edges alternating with a plurality of second edges cutting; a central through hole extending between, and opening to the end surfaces; and two insert contact surfaces, each insert contact surface located at a respective surface end, where: each of the peripheral side portions includes a first subface and a second non-coplanar subface with the first subface, the first and the second subfaces define at least one intermediate plane located between the end surfaces and parallel to the end surfaces, the first and second subfaces that intersect on one of at least one intermediate plane, and on each peripheral side portion: each first subface extends between a respective of the first cutting edges and one of at least one intermediate plane, forming a first internal insert angle with an end plane defined by one of the end surfaces, each second subface extends between a respective of the second edges of cut and one of at least one intermediate plane, forming a second acute insert internal angle c With another end plane defined by one of the end surfaces, the second internal insert angle is different from the first internal insert angle.
    [00011] According to another embodiment of the present invention, a cutting tool having a longitudinally rotating geometric axis is provided, the cutting tool comprising: a tool body having at least one insert cavity formed at a front end of the body tool; and a cutting insert as described above is retained in at least one insert cavity, wherein: the at least one insert cavity comprises: a cavity contact surface that defines a contact plane; a threaded hole that opens to the cavity contact surface; two cavity receiving side walls extending from the contact plane, each cavity receiving side wall including: a first flat side wall section forming an external insert receiving angle with a plane that intersects the first section with a flat side wall and parallel to the contact plane; and a second section of the flat side wall that intersects with the respective first section of the flat side wall, and extending to the contact plane to form an acute external cavity angle therewith; one of the two insert contact surfaces contacts the cavity contact surface; the first subfaces of two peripheral side portions of the cutting insert contact respective of the first side wall sections, in a fit form; and a fixing screw passes through the central through-hole of the cutting insert and threadedly engages the threaded hole of the insert cavity.
    [00012] According to a further embodiment of the present invention, a cutting tool body having a longitudinal rotational axis is provided, the cutting tool body having a front end with at least one insert cavity formed therein, wherein: at least one insert cavity comprises: a cavity contact surface that defines a contact plane; a threaded hole that opens to the cavity contact surface; and two cavity receiving side walls extending from the contact plane, each of the cavity receiving side walls including: a first section of the flat side wall forming an external insert receiving angle with a plane that intersects the first flat side wall section and is parallel to the contact plane; and a second section of the flat side wall that intersects with the respective first section of the flat side wall, and extending to the contact plane to form an acute external cavity angle therewith; wherein in a front view of each insert cavity, the two cavity receiving side walls form a substantially right angle between them. Brief Description of Drawings
    [00013] For a better understanding, the invention will now be described, by way of example only, with reference to the attached drawings in which current-dash lines represent cut-out limits for partial views of a limb and in which: Fig. 1A is a perspective view of a cutting tool according to some embodiments of the present invention; Fig. 1B is an exploded side view of the cutting tool shown in Fig. 1A, which reveals an insert cavity; Fig. 1C is a perspective view of the insert cavity shown in Fig. 1B; Fig. 1D is a front view of the insert cavity shown in Fig. 1B; Fig. 1E is a cross-sectional view of the insert cavity shown in Fig. 1D taken along line V-V; Fig. 2A is a perspective view of a cutting insert according to a first embodiment of the present invention; Fig. 2B is a top view of the cutting insert shown in Fig. 2A; Fig. 2C is a cross-sectional view of the cutting insert shown in Fig. 2B taken along line I-I; Fig. 2D is a cross-sectional view of the cutting insert shown in Fig. 2B taken along line II-II; Fig. 3A is a perspective view of a cutting insert according to a second embodiment of the present invention; Fig. 3B is a top view of the cutting insert shown in Fig. 3 A; Fig. 3C is a cross-sectional view of the cutting insert shown in Fig. 3B taken along line III-III; and Fig. 3D is a cross-sectional view of the cutting insert shown in Fig. 3B taken along line IV-IV. Detailed Description of the Invention
    [00014] The present invention relates to a cutting insert that can be reversibly indexed, having two opposite polygonal shaped end surfaces and a peripheral surface extending between them. The invention also relates to a cutting tool for employing the cutting inserts at a positive axial inclination angle and a negative axial inclination angle when engaging a workpiece.
    [00015] Reference is first made to Figure 1A which represents a cutting tool 100 according to some embodiments of the present invention. The cutting tool 100 includes a tool body 110. The cutting tool 100 has a longitudinally rotating geometry axis B1, a front end 102, and a rear end 104. The tool body 110 includes a plurality of cutting inserts 20 , 130 mounted on it. Each of the cutting inserts 20, 130 is seated within a respective insert cavity 106 and retained by a respective fixing screw 108.
    [00016] Reference is now made to Figures 2A to 2D, which represents cutting insert 20 according to a first embodiment of the present invention, including a first polygonal shaped end surface 22 and a second polygonal shaped end surface. opposite 24, identical and generally parallel to the first end surface 22. The first end surface 22 defines a first end plane P1 and second end surface 24 defines a second end plane P2, the first and second end planes P1, P2 being parallel to each other. The first end plane P1 can correspond to a flat surface resting on the first end surface 22 while the second end plane P2 can correspond to a flat surface on which the second end surface 24 rests. Thus, the first end plane P1 is generally parallel to the first end surface 22 and a plurality of cutting edges (which is discussed below) formed at a periphery of the first end surface 22 may, in some embodiments, all be as in the first end plane P1 or have some other common position relationship with respect to the first end plane P1. The second end plane P2 has a similar relationship to the second end surface 24.
    [00017] The cutting insert 20 exhibits rotational symmetry around a geometric axis of insert B2. The second end surface 24 is rotated about the insert geometric axis B2, relative to the first end surface 22. The first end surface 22 and second end surface 24 both have an uneven octagon polygonal shape, such that the second end surface 24 is rotated with respect to the first end surface 22 by an angle of 45 °. As the two end surfaces 22, 24 are identical, yet rotated with respect to each other, only one of them will be described in detail.
    [00018] The cutting insert 20 additionally includes a peripheral side surface 26 extending between the opposite end surfaces 22, 24. The peripheral side surface 26 includes a plurality of peripheral side portions 30, 32 arranged circumferentially in alternating orientation. Each of the first peripherally oriented side portions 30 is an inverse copy (i.e., upside down copy) of its second adjacent peripherally oriented side portion 32.
    [00019] The intersection of the first end surface 22 with the peripheral side surface 26 forms a first continuous circumferential cutting edge 46. The intersection of the second end surface 24 with the peripheral surface 26 forms a second continuous circumferential cutting edge 48. The first circumferential cutting edge 46 is formed along the entire intersection of the first end surface 22 with the peripheral side surface 26. The first circumferential cutting edge 46 includes four identical cutting edge sections 50. Each edge section of cut 50 extends between two vertices of the polygonal shape of the first end surface 22. Each cut edge section 50 includes a first cut edge 58 and a second cut edge 60. Each of the peripheral side portions 30 and 32 extends between one of the first cutting edges on any of the end surfaces 22, 24, and one of the second cutting edges on the other end surface. As shown in Figure 2A, each first peripheral side portion 30 extends between one of the first cutting edges 58 located on the first end surface 22, and one of the second cutting edges 74 located on the second end surface 24. Each of the portions peripheral side 32 extends between one of the first cutting edges 52 located on the second end surface 24, and one of the second cutting edges 60 located on the first end surface 22.
    [00020] Since the polygonal shape of each of two end surfaces 22, 24 is an uneven octagon, each end surface 22, 24 has four long sides and four short sides, alternately arranged along their respective edge. circumferential section 46, 48. In each section of cutting edge 50, first cutting edge 58 is located on one of the long sides of the uneven octagon, while second cutting edge 60 is located on one of the short sides of the uneven octagon. Each first cutting edge 58 has a first length A, and each second cutting edge 60 has a second length W. Thus, the first length A of each first cutting edge 58 is preferably greater than the second length W of each second. cutting edge 60. According to a specific embodiment of the present invention, the ratio between the second length W and the first length A (that is, W / A), is in the range of 1/10 <W / A <2 / 3. According to an additional specific embodiment of the present invention, the ratio W / A = 2/3. As shown in Figure 2B, two imaginary lines L1, L2, containing first cutting edges 58 from two adjacent cutting edge sections 50, form a right angle between them.
    [00021] The cutting insert 20 also includes a central through hole 62 extending between, and opening onto, both end surfaces 22, 24. The first end surface 22 includes an insert contact surface 64 that substantially surrounds the opening of the through hole 62, and extending to each of the second cutting edges 60 of the first end surface 22. Each of the peripheral side portions 30, 32 extends between one of the first cutting edges 58, 52, in any of the end surfaces 22, 24, and one of the second cutting edges 60, 74, on the other end surface, a first operative cutting edge 58 is thus supported by a portion of the insert contact surface 64 on the other side of the cutting insert 20, thereby providing additional strength during metal cutting processes.
    [00022] The first peripheral side portions 30 alternate in the circumferential direction of the insert with second peripheral side portions 32. As shown in Figure 2A, each first peripheral side portion 30 includes a first subface 70 and a second subface 72 that intersects on a line N1 , in an intermediate plane P3. The first subface 70 and the second subface 72 are located on non-coplanar surfaces. Each peripheral side portion 32 includes a first subface 66 and a second subface 68 that intersects on a line N2, in an intermediate plane P4. The first subface 66 and the second subface 68 are also located on non-coplanar surfaces. Thus, the two subfaces that belong to each of the first peripheral side portions 30 intersect in lines N1 that together define the first intermediate plane P3, while the two subfaces each belong to the second peripheral side portions 32 intersect in lines N2 that together define the background P4.
    [00023] As shown in Figures 2C and 2D, each of the intermediate planes P3 and P4 is located between, and is parallel to the end surfaces 22 and 24. The intermediate planes P3, P4 are parallel and are spaced apart, while a first distance d1 between intermediate planes P3, P4 and the first and second end surfaces 22, 24, respectively, is less than half the thickness distance H between end surfaces 22 and 24 (i.e., H being the thickness cutting insert 20).
    [00024] Subfaces 70, 72 of each of the first peripheral side portions 30 intersect on the first line N1 which is a first distance d1 from the first end plane P1 and a second distance d2 from the second end plane P2, while the subfaces 70, 72 of each of the second peripheral side portions 32 intersect on the second line N2 which is a first distance d1 from the second end plane P2 and a second distance d2 from the first end plane P2. Thus, as seen in Figures 2C and 2D, each plane P3, P4 is a first distance d1 from one of the end surfaces and a second complementary distance d2 from another end surface.
    [00025] Each of the first subfaces extends between a respective of the first cutting edges and one of the intermediate planes, forming a first internal angle of insert α with an end plane. As shown in Figure 2C, the first subface 70 forms a first internal angle of insert α with a first end plane P1. Similarly, as shown in Figure 2D, the first subface 66 forms a first internal angle of insert α with the second end plane P2.
    [00026] It should be noted that the use of the terms "internal angle" and "external angle" throughout the description and claims refers to an angle between two planar surface components, as measured internal and external to the member on which the components of surface are formed, respectively.
    [00027] Each of the second subfaces extends between a respective of the second cutting edges and one of the intermediate planes, forming a second internal insert angle θ with an end plane. As shown in Figure 2C, the second subface 72 forms a second internal insert angle θ with the second end plane P2. Similarly, as shown in Figure 2D, the second subface 68 forms a second internal insert angle θ with the first end plane P1.
    [00028] According to the present invention, the second internal angle of insertion θ is an acute angle, and different from the first internal angle of insertion α. Since the first subface and the second subface of the same peripheral lateral portion are located on non-coplanar surfaces and end planes P1 and P2 are parallel to each other, the sum of the first internal angle of insertion α and the second internal angle of insertion θ is different than 180 ° (that is, α + θ Φ 180 °). According to a specific embodiment of the present invention, the first internal insert angle α is in the range of 85 ° to 100 °, and the second internal insert angle θ is in the range of 65 ° to 83 °. According to a specific embodiment of the present invention, the first internal insert angle α is a 95 ° angle, and the second internal insert angle θ is an angle of 77 °.
    [00029] These typical values of the first internal insert angle α and the second internal insert angle θ of the cutting insert 20 allow the positioning of the cutting insert 20 at a positive axial inclination angle, in relation to the workpiece surface. during operation. The axial inclination angle is measured between a plane of the end surface of the cutting insert, and a plane perpendicular to the surface of the bottom end of the tool body and including the smallest cutting edge of the cutting insert therein. In addition, these geometric characteristics of the cutting insert 20 allow the positioning of the cutting insert 20 at a negative axial inclination angle, during operation on a workpiece. The radial tilt angle is measured between a radius of the rotary cutting tool and the smallest cutting edge of the cutting insert. Such positioning of the cutting insert can be considered as a positive - negative insert geometry, which introduces significant advantages for a cutting tool in operation, such as reducing the energy required to operate the cutting tool, better chip removal, and the like .
    [00030] The first end surface 22 includes a plurality of inclined depressions 80, each inclined depression having an elongated shape and is located substantially along a respective first cutting edge, extending inwardly from the respective first cutting edge. . As shown in Figures 2B and 2C, each inclined depression 80 is located along the first cutting edge 58, and extends inwardly from the first cutting edge 58. When cutting insert 20 is used in cutting metal, the first cutting edge 58 contacts the surface of a workpiece to remove material therefrom. The removed material, in the form of metal chips, flows along the sloping depression 80, and can then be removed from the cutting area.
    [00031] It should be noted that the cutting insert 20 is a reversible and indexable cutting insert, such that any of the cutting edge sections 50 on the first end surface 22, as well as the cutting edge sections located on the second end surface 24, can also be used in cutting metal. Once a certain portion of the cutting edge of the cutting insert is worn, the cutting insert is rotated or turned (either by an operator or automatically) in order to employ a new portion of the cutting edge.
    [00032] It should be noted in addition that the numeral signs "1" to "4"; appearing on the first end surface 22 in Figure 2 A and 2B are index numerals, to indicate to a cutting insert operator 20, which section of the cutting edge is being used. Additional numeral signs "5" to "8" appear at similar locations on end surface 24. By following the numerals on end surfaces 22 and 24, the operator of the cutting insert 20 can confirm which of the eight cutting edge sections is being used in each operation.
    [00033] Although the cutting insert currently described includes end surfaces shaped as unequal octagons, such that each circumferential cutting edge includes four first cutting edges and four second cutting edges, it should be realized that the end surface may have any other polygonal shape, such that each circumferential cutting edge can include N cutting edge sections, that is, N first cutting edges and N second cutting edges, where N is a positive integer, and N> 2. Such a cutting insert can also include 2N peripheral side portions.
    [00034] Reference is now made to Figures 3A to 3D, which represents a cutting insert 130, according to another modality of the disclosed technique. The cutting insert 130 includes a first polygonal shaped end surface 132 and a second opposite polygonal shaped end surface 134, identical and parallel to the first end surface 132. The cutting insert 130 exhibits rotational symmetry around of a geometric axis of insert B3. The second end surface 134 is rotated about the insert geometric axis B3, relative to the first end surface 132. The first end surface 132 and second end surface 134 both have an uneven octagon polygonal shape, such that the second end surface 134 is rotated with respect to the first end surface 132 by an angle of 45 °. The cutting insert 130 has a mid plane M, located between end surfaces 132 and 134, and is parallel to the end surfaces 132 and 134. As seen in Figures 3C and 3D, the distances d1 and d2 from the mid plane M for the two end planes S1 and S2 have a common distance d, and thus the middle plane M is equally distant from each of the end surfaces 132 and 134.
    [00035] The cutting insert 130 additionally includes a peripheral side surface 136 extending between end surfaces 132 and 134. The peripheral side surface 136 includes a plurality of peripheral side portions 140 and 142, arranged circumferentially in alternating orientation. Each of the first peripherally oriented side portions 140 is a reverse copy (i.e., upside down copy) of its second adjacent peripherally oriented side portion 142.
    [00036] The intersection of the first end surface 132 with the peripheral side surface 136 forms a first continuous circumferential cutting edge 135. The intersection of the second end surface 134 with the peripheral side surface 136 forms a second continuous circumferential cutting edge 137 The first circumferential cutting edge 135 includes four identical cutting edge sections 170. Each cutting edge section 170 extends between two vertices of the polygonal shape of the first end surface 132. Each cutting edge section 170 includes a first cutting edge 161 and a second cutting edge 163.
    [00037] Each of the peripheral side portions 140 and 142 extends between one of the first cutting edges on any of the end surfaces 132, 134, and one of the second cutting edges on the other end surface. As shown in Figure 3A, each peripheral side portion 140 extends between one of the first cutting edges 161 located on the first end surface 132, and one of the second cutting edges 167 located on the second end surface 134. Each of the side portions peripheral 142 extends between one of the first cutting edges 165 located on the second end surface 134, and one of the second cutting edge 163 located on the first end surface 132. Each peripheral side portion 142 includes a first subface 156 and a second subface 158, and each peripheral side portion 140 includes a first subface 160 and a second subface 162. The first subface 156 and the second subface 158 are located on non-coplanar surfaces, and the first subface 160 and the second subface 162 are located on non-coplanar surfaces. coplanar.
    [00038] The cutting insert 130 is substantially similar to the cutting insert 20, discussed here above, with the exception that the subfaces of the peripheral side portions intersect in a single middle plane M. Each of the first subfaces of the peripheral side surface 136 extends between one of the first cutting edges and the median plane M, forming a first internal insert angle Φ with an end plane. As shown in Figure 3C, the first subface 160 forms a first internal insert angle Φ with the first end plane SI, ie defined by the first end surface 132. Similarly, as shown in Figure 3D, the first subface 156 forms a first internal insert angle Φ with the second end plane S2 or defined by the second end surface 134.
    [00039] Each of the second subfaces of the peripheral lateral surface 136 extends between one of the second cutting edges and the median plane M, forming a second internal insert angle y with an end plane. As shown in Figure 3C, the second subface 162 forms a second internal insert angle y with the second end plane S2. Similarly, as shown in Figure 3D, the second subface 158 forms a second internal insert angle y with the first reference plane S1.
    [00040] With additional reference to Figures 1A to 1E, tool body 110 includes a plurality of cutting inserts 20 mounted thereon, where each cutting insert is seated within a respective insert cavity 106 and retained by a respective screw fastening 108. As is best shown in Figures 1B and 1C, insert cavity 106 includes a preferably planar cavity contact surface 112 that defines a contact plane P5, a threaded hole 120, a first and a second receiving side wall cavity 1141 and 1142, and a cavity release surface 126.
    [00041] Threaded hole 120 opens to the cavity contact surface 112. Cavity receiving side walls 1141, 1142 extend from the cavity contact surface 112 in a general tangential direction of the tool body 110. As the two cavity receiving side walls 1141, 1142 are identical (however angled with respect to each other), only one of which will be described in detail. The cavity release surface 126 includes a first end 127 coupled with the cavity contact surface 112, and a second end 129. The cavity release surface 126 extends from the cavity contact surface 112 along the end bottom 102 (Figure 1A) of the tool body 110, narrowing in a backward direction (that is, away from the cutting insert seat 20), towards the second end 129. The cavity release surface 126 provides a release for the operating cutting edge 58, when the cutting insert 20 is operative against a workpiece.
    [00042] The tool body 110 can optionally include a cooling channel 115, which opens adjacent the insert cavity 106, to provide coolant for the operating cutting edge 58 of the cutting insert 20, during operation against a work piece. Such cooling fluid may be necessary or desirable in order to reduce the heat generated in the contact area of the cutting edge and the workpiece during the metal cutting operation.
    [00043] The first cavity receiving side wall 1141 additionally includes a first flat side wall section 1161. As is best shown in Figure 1E, the first flat side wall section 1161 forms an external insert receiving angle β with a plane P6, which intersects the first section of the flat side wall 1161, and is parallel to the contact plane P5. The first cavity receiving side wall 1141 additionally includes a second flat side wall section 1181, which intersects with the first flat side wall section 1161. The second flat side wall section 1181 extends to contact plane P5, to form an angle acute cavity external Φ with contact plane P5. The second cavity receiving side wall 1142 similarly includes the first and second flat side wall sections 1162, 1182.
    [00044] As is best shown in Figure 1D, in a front view of the insert cavity 106, each of the respective respective cavity receiving side walls 1141, 1142 contains an imaginary line L3, L4, respectively. The imaginary lines L3, L4 form a substantially right angle Y between them, and thus cavity receiving side walls 1141, 1142 itself can be considered to form a right angle y between them. The y angle substantially conforms to the right angle formed between the two imaginary lines L1 and L2 (shown in Figure 2B) containing first cutting edges 58 from two adjacent cutting edge sections 50. It should be noted that the angle y between the imaginary lines L3 and L4 may be slightly smaller than a right angle (for example, y = 89.5 °), in order to reduce the contact surface between the first sections of the side wall of the cavity, and the respective first subface of the cutting insert, when the cutting insert is seated inside the cavity.
    [00045] The cutting insert 20 is seated within the insert cavity 106, such that the contact surface of the second end surface 24 contacts against the contact surface of cavity 112. In addition, each of the first subfaces of the first two portions peripheral side 30 (Figure 2A), contacts against a respective of the first side wall sections 1161 and 1162. In this way, two of the first peripheral side portions 30 are fixed with respect to the receiving side walls 1141 and 1142, in a snap-in manner , due to its corresponding shape. In addition, the fastening screw 108 passes through the central through-hole 62 of the cutting insert 20 and threadedly engages the threaded hole 120 of the cavity 106, in order to secure the cutting insert 20 in the operating place.
    [00046] The acute external cavity angle Φ is slightly less than the second internal angle of insertion θ, in order to avoid contact between the second section of the side wall of the cavity, and the respective second subface of the peripheral lateral portion of the insert . The external insert receiving angle β is slightly larger than the first internal insert angle α, in order to reduce the contact surface between the first section of the side wall of the cavity and the respective first subface of the cutting insert. In a specific embodiment of the invention, the external insertion angle β is greater than the second internal angle of insertion at 0.5 °. It should be further noted that the shape of each of the receiving side walls 1141 and 1142 substantially conforms to the shape of the respective first peripheral side portion 30.
    [00047] Although the present invention has been described to a certain degree, it should be understood that various changes and modifications can be made without departing from the spirit or scope of the invention as claimed hereinafter.
    权利要求:
    Claims (14)
    [0001]
    1. Reversible indexable cutting insert (20, 130), comprising: a first polygonal shaped end surface (22, 132) and a second polygonal shaped end surface (24, 134), identical and parallel to the first end surface (22, 132), the second end surface (24, 134) being rotated with respect to the first end surface (22, 132); a peripheral side surface (26, 136) extending between the end surfaces (22, 24, 132, 134), the peripheral side surface (26, 136) including a plurality of peripheral side portions (30, 32, 140, 142 ); two continuous circumferential cutting edges (46, 48, 135, 137), each circumferential cutting edge (46, 48, 135, 137) formed along the entire intersection of each end surface (22, 24, 132, 134 ) with the peripheral side surface (26, 136), each circumferential cutting edge (46, 48, 135, 137) comprising a plurality of first cutting edges (52, 58, 161, 165) alternated with a plurality of second edges cutting (60, 74, 163, 167); a central through-hole (62) extending between and opening to the end surfaces (22, 24, 132, 134); and two insert contact surfaces (64), each insert contact surface (64) located at a respective surface end (22, 24, 132, 134), characterized by the fact that: each of the peripheral side portions ( 30, 32, 140, 142) includes a first subface (66, 70, 156, 160) and a second subface (68, 72, 158, 162) not coplanar with the first subface (66, 70, 156, 160), the first and second subfaces define at least one intermediate plane (M, P3, P4) located between the end surfaces (22, 24, 132, 134) and parallel to the end surfaces (22, 24, 132, 134), the first and second subfaces that intersect in one of at least one intermediate plane (M, P3, P4), and that in each peripheral lateral portion (30, 32, 140, 142): each first subface (66, 70, 156, 160) extends between a respective of the first cutting edges (52, 58, 161, 165) and one of at least one intermediate plane (M, P3, P4), forming a first internal angle of insert (α, Φ) with an end plane (P1, P2, S1, S2) defined by one of the end surfaces (22, 24, 132, 134), each second subface (68, 72, 158, 162) extends between a respective of the second cutting edges (60, 74, 163, 167) and one of at least one intermediate plane (M, P3, P4), forming a second internal acute insert angle (θ, y) with another plane edge (P1, P2, S1, S2) defined by one of the end surfaces (22, 24, 132, 134), the second internal insert angle (θ, y) being different from the first internal insert angle (α, Φ).
    [0002]
    2. Cutting insert (20) according to claim 1, characterized by the fact that the subfaces (66, 68, 70, 72) of adjacent peripheral side portions (30, 32) intersect in different spaced intermediate planes (P3, P4), and in which each of the spaced intermediate planes (P3, P4) is distanced by a similar first distance (d1) from the plane closest to the end (P1, P2).
    [0003]
    Cutting insert (20) according to claim 2, characterized in that the two end surfaces (22, 24) are spaced apart by a distance of thickness H, and in which the first distance (d1) is smaller than half the thickness H distance.
    [0004]
    Cutting insert (130) according to any one of claims 1 to 3, characterized by the fact that the subfaces (156, 158, 160, 162) of each peripheral lateral portion (140, 142) intersect in a single plane medium (M), equidistant from the end planes (S1, S2).
    [0005]
    Cutting insert (20, 130) according to any one of claims 1 to 4, characterized in that each circumferential cutting edge (46, 48, 135, 137) includes N first cutting edges (52, 58 , 161, 165) and N second cutting edges (60, 74, 163, 167), N being a positive integer greater than 2.
    [0006]
    Cutting insert (20, 130) according to any one of claims 1 to 3, characterized in that the polygonal shape of each of the end surfaces (22, 24, 132, 134) is an uneven octagonal shape .
    [0007]
    Cutting insert (20, 130) according to any one of claims 1 to 6, characterized in that the first internal insert angle (α, Φ) is in the range of 85 ° to 100 °.
    [0008]
    Cutting insert (20, 130) according to any one of claims 1 to 3, characterized in that the second internal insert angle (θ, y) is in the range of 65 ° to 83 °.
    [0009]
    Cutting insert (20, 130) according to any one of claims 1 to 8, characterized in that each of the first cutting edges (52, 58, 161, 165) has a first length A and each the second cutting edges (60, 74, 163, 167) have a second length W, and the first length A is greater than the second length W.
    [0010]
    10. Cutting insert (20, 130) according to claim 1, characterized by the fact that the first length A and the second length W define a W / A ratio, and in which the W / A ratio is in the range of 1/10 <W / A <2/3.
    [0011]
    11. Cutting tool (100) which has a longitudinally rotating geometric axis (B1), the cutting tool (100) comprising: a tool body (110) which has at least one insert cavity (106) formed in one front end (102) of the tool body (110); and a cutting insert (20, 130) as defined in claim 1 retained in at least one insert cavity (106), characterized in that: at least one insert cavity (106) comprises: a contact surface cavity (112) that defines a contact plane (P5); a threaded hole (120) that opens to the cavity contact surface (112); two cavity receiving side walls (1141; 1142) extending from the contact plane (P5), each of the cavity receiving side walls (1141; 1142) including: a first flat side wall section (1161, 1162) forming an external insertion angle (β) with a plane (P6) that intersects the first section of the flat side wall (1161; 1162) and is parallel to the contact plane (P5); and a second section of the flat side wall (1181, 1182) that intersects with the respective first section of the flat side wall (1161, 1162), and extending to the contact plane (P5) to form an acute external cavity angle ( Φ) with the same; one of the two insert contact surfaces (64) contacts the cavity contact surface (112); the first subfaces (66, 70, 156, 160) of two peripheral side portions (30, 32, 140, 142) of the cutting insert (20, 130) contact respective of the first side wall sections (1161, 1162), in a fitting shape; and a fixing screw (108) passes through the central through-hole (62) of the cutting insert (20, 130) and threadedly engages the threaded hole (120) of the insert cavity (106).
    [0012]
    Cutting tool (100) according to claim 11, characterized in that the external cavity angle (Φ) is less than the second internal insert angle (θ, y); and, the external insert receiving angle (β) is greater than the first internal insert angle (α, Φ) of the cutting insert (20, 130).
    [0013]
    13. Cutting tool (100) according to either of claims 11 or 12, characterized by the fact that the first two subfaces (66, 70, 156, 160) in contact with the respective first sidewall sections (1161, 1162 ), in a fit form, are associated with the same end surface (22, 24, 132, 134) as the cutting insert (20, 130).
    [0014]
    Cutting tool (100) according to any one of claims 11 to 13, characterized in that in a front view of at least one insert cavity (106), the two respective cavity receiving side walls (114I ; 1142) form a substantially right angle (y) between them.
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    同族专利:
    公开号 | 公开日
    DE112012005340T5|2014-09-18|
    US20130156515A1|2013-06-20|
    PL2794160T3|2019-09-30|
    RU2014129790A|2016-02-10|
    TR201910919T4|2019-08-21|
    EP2794160A1|2014-10-29|
    WO2013093907A1|2013-06-27|
    BR112014014283A2|2017-06-13|
    CN104023887B|2017-08-25|
    EP2794160B1|2019-04-24|
    RU2609587C2|2017-02-02|
    JP6146924B2|2017-06-14|
    KR101735896B1|2017-05-15|
    JP2015500150A|2015-01-05|
    PT2794160T|2019-07-15|
    CA2853928A1|2013-06-27|
    IN2014KN00933A|2015-10-09|
    KR20140106558A|2014-09-03|
    ES2721881T3|2019-08-06|
    CN104023887A|2014-09-03|
    CA2853928C|2017-04-18|
    US9475134B2|2016-10-25|
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    法律状态:
    2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-01-28| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-11-10| B07A| Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]|
    2021-03-16| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-03-30| 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 20/11/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US201161577428P| true| 2011-12-19|2011-12-19|
    US61/577,428|2011-12-19|
    PCT/IL2012/050467|WO2013093907A1|2011-12-19|2012-11-20|Cutting insert and cutting tool|
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