• 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 TOOL WITH REPLACABLE CUTTING EDGE. A cutting tool with a replaceable cutting edge having a configuration capable of stably supporting a rotational movement acting on a cutting insert fixed on an insert assembly face of a body is provided. It includes a cutting insert (10), a body (20) including an insert mounting portion (21) for removably mounting the cutting insert (10) and a receiving mechanism for receiving the rotational movement acting on the insert cutting edge (10) in order to rotate the cutting insert (1 O) mounted on the insert mounting portion (21) on the base surface (21A), the mechanism including a first engaging portion (14) formed in a lower surface of the cutting insert (10) and a second engagement portion (25) formed on the base surface (21A) of the insert mounting portion (21) that is formed to engage with a specific portion (15) of the surface defining the first engagement portion (14) to receive the rotation movement.
    公开号:BR112014008368B1
    申请号:R112014008368-1
    申请日:2012-10-05
    公开日:2020-12-08
    发明作者:Ryuichi Saji；Kedar Suresh Bhagath
    申请人:Tungaloy Corporation；
    IPC主号:
    专利说明:

    DESCRIPTION Technical Field
    [0001] The present invention relates to a cutting tool with a replaceable cutting edge, provided with a removable insert. Prior Art
    [0002] For a cutting tool with a replaceable cutting edge, which fixes a cutting insert on a body, the stable fixation of the cutting insert, which does not move during cutting processing, is a crucial element in determining the roughness of surface of a finished surface. Therefore, in a conventional cutting tool field with a replaceable cutting edge, several types of methods for stably fixing the cutting insert are proposed. For example, Patent Literature 1 exposes a configuration in which a recessed portion in a predetermined shape is formed on a lower surface side of the cutting insert, and on an insert insert surface of the body for mounting the cutting insert , a projection that corresponds to an outlined shape of a recessed portion is formed, so that the projection and a recessed portion fit together. This configuration restricts the rotation of the cutting insert on the insert assembly face by adjusting the projection within a recessed portion. Citation List Patent Literature
    [0003] PTL1: Japanese Patent Application, open to public inspection, No. 2003-533357. Summary of the Invention Technical problem
    [0004] However, the configuration exposed in Patent Literature 1 causes the problems described below. In order to smoothly insert the projection formed on an insert mounting surface into a recessed portion of the cutting insert, a dimension of the projection is designed to be slightly smaller than the dimension of a recessed portion. Therefore, a slight gap is formed between the projection and a recessed portion. In addition, several types of dimensional errors in manufacturing are accumulated. Thus, a portion where the projection and the recessed portion come into contact with each other varies depending on a gap and dimensional errors. As a result, a rotational movement caused by cut resistance acting on the cutting insert cannot be sustained stably. In other words, when the projection and the recessed portion come into contact irregularly, the rotation movement acting on the cutting insert cannot be received under the same condition, and thus the surface roughness of the finished surface may not be constant.
    [0005] One of the purposes of the present invention is to provide the cutting tool with a replaceable cutting edge having a configuration capable of stably supporting the rotation movement acting on the cutting insert fixed on a body insert mounting surface. Solution to the Problem
    [0006] A cutting tool with replaceable cutting edge (1) of the present invention includes: a plate-shaped cutting insert (10) including opposing upper and lower surfaces (11, 13) and a lateral surface (12) extending between the upper and lower surfaces; a body (20) including an insert mounting portion (21) for removably mounting the cutting insert (10), the insert mounting portion (21) having a base surface (21 A) to support the. -. Lower vs. surface (13) of the cutting insert (10) and side wall surfaces (21B, 21C) to support the side surface (12) of the cutting insert (10); and a receiving mechanism configured to receive a rotation movement, the rotation movement acting on the cutting insert (10) in order to rotate the cutting insert (10) mounted on the insert mounting portion (21) on the base surface (21 A), wherein the receiving mechanism includes a first engagement portion (14) formed on the lower surface of the cutting insert (10) and a second engagement portion (25) formed on the base surface (21 A) of the insert assembly portion (21), and wherein the second engagement portion (25) is formed to engage with a specific portion (15), of the surface defining the first engagement portion (14), for receive the rotation movement. Preferably, the insert mounting portion (21) includes a mounting hole (23) that is formed on the base surface to support the cutting insert, on which side wall surfaces of the mounting portion insert (21) includes a first side wall surface (21B) vol to an outer peripheral side of the cutting tool with replaceable cutting edge (1) and a second side wall surface (21C) facing an initial end side of the cutting tool with replaceable cutting edge (1), and in that the second engagement portion (25) is formed on an opposite side from the side of the first side wall surface (21B) with respect to a central geometric axis (AX1) of the mounting hole (23) in one direction (Dl) in the which the first side wall surface (21B) faces.
    [0007] More preferably, in the second engagement portion (25), a backrest portion to abut the first engagement portion (14) is, in a direction (D2) in which the second side wall surface (21C) is turned, formed on the side of the second side wall surface (21C) with respect to a central geometrical axis of the mounting hole (23). Advantageous Effects of the Invention
    [0008] According to the present invention, since, in a receiving mechanism, the second engagement portion is engaged with the specific portion of the first engagement portion to receive a rotation movement, the rotation movement caused by the resistance when cutting, acting on the cutting insert, it can be stably sustained and, as a result, the roughness of the finished surface can be improved. Brief Description of the Drawings
    [0009] Figure 1 is a perspective view of a cutting tool with a replaceable cutting edge according to a first embodiment of the present invention; figure 2 is a perspective view illustrating a cutting insert shown in figure 1, when viewed from below; figure 3 is a rear view showing the cutting insert in the cutting tool shown in figure 1; figure 4 is a plan view showing the cutting insert in the cutting tool illustrated in figure 1; figure 5 is a perspective view showing a body in the cutting tool shown in figure 1; figure 6 shows the body in the cutting tool illustrated in figure 1, when viewed from an attack side; figure 7 is an enlarged view of an insert assembly portion of the body in the cutting tool illustrated in figure 1; Figure 8 is a schematic view showing a positional relationship between a first engagement portion and a second engagement portion; figure 9A is a schematic view illustrating a rotation movement applied to the cutting insert in the cutting tool according to the present embodiment; Figure 9B is a schematic view illustrating a rotation movement applied to the cutting insert when the second engagement portion is formed in a different position from that of the present embodiment; figure 10A is a perspective view showing a body of a cutting tool according to a second embodiment of the present invention; figure 10B is an enlarged view of a circumscribed portion shown in figure 10A; and figure 11 is a perspective view illustrating another example of the cutting tool with replaceable cutting edge, to which the present invention can be applied. Description of Modalities
    [00010] With reference to the drawings, the modalities according to the present invention will be described below. (First modality)
    [00011] As illustrated in figure 1, a cutting tool with a replaceable cutting edge 1 (referred to as a "cutting tool 1" hereinafter) of the present embodiment includes a cutting insert 10, a body 20 on which the cutting insert cut 10 is remarkably assembled, and a screw 30 for fixing cut insert 10 to body 20. The definition of "body" in the following description is in line with the definition by Japanese Industrial Standards (JIS). Cutting tool 1 is a rotary tool for cutting a job when it is rotating around a C rotation axis.
    [00012] As illustrated in figures 2 to 4, an external shape of an upper surface 11 of the cutting insert 10 is formed in a circle. A clearance angle is provided on a side face 12, and the cutting insert 10 is formed into a positive type cutting insert. Since an outer shape of the lower surface 13 is formed in a circle as well as that of the upper surface 11, the cutting insert 10 has a rotationally symmetrical shape with respect to a central geometry axis J which is a line of geometric axis that passes by a centroid of the cutting insert 10. The cutting insert 10 is formed with a mounting hole 18 passing through the upper surface 11 and the lower surface 13, and a screw 30 is inserted into the mounting hole 18. A central geometry axis of the mounting hole 18 coincides with a central geometry axis J of the cutting insert 10. A design formed on the upper surface 11 indicates the position when the corner change is made.
    [00013] On the lower surface 13 of the cutting insert 10, a first engagement portion 14 defined by a recessed portion is formed. The first engagement portion 14 is defined by a base surface portion 17 surrounding the mounting hole 18 and a side wall surface that rises from an outer peripheral portion of the base surface portion 17. The wall surface side includes six recessed hinge portions 15, each of which is curved in a recessed shape, regularly (in the same interval) arranged in a circumferential direction around the central geometry axis J, and six curved projection portions 16, each of which is curved into a projection shape and arranged between adjacent lowered hitch portions 15. Among the plurality of lowered hitch portions 15, only the specific lowered hitch portion 15 is engaged with (leans over) the projection hitch portion engagement 25A of a second engagement portion 25 described below. More specifically, the first hitch portion 14 has a contour shape having rotational symmetry property of six-fold symmetry with respect to the central geometric axis J of the cutting insert 10. The plurality of recessed hinge portions 15 is regularly arranged around the axis central geometrical J such that, so called, the corner change to replace a worn cutting edge that can no longer be used with another cutting edge can be performed. In other words, the cutting insert 10 can be indexed.
    [00014] As illustrated in figures 5 and 6, the body 20 includes an insert assembly portion 21 for removably mounting the cutting insert 10. The insert assembly portion 21 is formed to cut a portion of the initial end portion of the body 20 and defined by the base surface 21 A, a first side wall surface 21B facing an outer peripheral direction side D1, and a second side wall face 21C facing an initial end direction side D2 and formed in a substantially orthogonal direction to the first side wall surface 21B. On each of the first side wall surface 21B and the second side wall surface 21C, a face curved in a recessed shape to support the side surface 12 of the cutting insert is formed. On the base surface 21 A, a threaded hole (mounting hole) 23 is formed. The screw 30 inserted in the cutting insert 10 is screwed with the threaded hole 23 to fix the cutting insert 10 in the insert assembly portion 21.
    [00015] Still, on the base surface 21 A, the second engagement portion 25 is formed. The second engagement portion 25 is defined by a projection projecting from the base surface 21A and received on the first engagement portion 14, described above, when the cutting insert 10 is mounted on the insert mounting portion 21. A The second engagement portion 25 includes, as shown in Figure 7, the engagement projection portion 25A including the curved side wall surface in the projection shape over an end portion of the second engagement portion 25. The engagement projection portion 25A it is provided within and engaged with a first recessed engaging portion 15, previously specified, of the plurality of recessed engaging portions 15, described above, to function to receive the rotational movement acting on the cutting insert 10 in order to rotate the insert cutter 10 mounted on the insert mounting portion 21 on the base surface 21 A. On the side wall surface of the second engagement portion 25, in a portion that does not touch the lowered engaging portion 15 of the first engaging portion 14, a reinforcement portion 25B for reinforcing the second engaging portion 25 is formed. Reinforcement portion 25B includes a curved relief portion in the recessed shape to prevent interference with the curved projection portion 16 of the first engagement portion 14.
    [00016] A position for forming the engagement projection portion 25A will be described here.
    [00017] The engagement projection portion 25A of the second engagement portion is formed in the first region RI on an opposite side from the side of the first side wall surface 21B of two regions on the base surface 21A divided by two by a virtual foreground P, which is orthogonal to the base surface 21 A, passes through the centroid of the cutting insert 10 mounted on the insert mounting portion 21, and extends in a longitudinal direction of the body 20. In other words, the projection portion of coupling 25A is formed in the first region RI positioned on an external peripheral side of the body 20 of the two regions of the base surface 21A divided by the first virtual plane P which is parallel to the geometric axis of rotation C of the body 20 and passes the centroid of an outer peripheral contour of the cutting insert 10. Figure 7 does not indicate a state where the cutting insert 10 is mounted on the insert assembly portion 21, but when the cutting insert 10 is mounted on the portion insert assembly 21, a central geometry axis AX1 of a mounting hole 23 passes the position of the cutting insert 10 centroid. Still preferably, a back portion of the second engagement portion 25 that abuts the first engagement portion 14 is formed in the second region R2 positioned on one side of the second side wall surface 21C of two regions in the first region RI divided by two by a second virtual plane Q which is octagonal to the first virtual plane P, and passes the cutting insert centroid 10 mounted on the insert mounting portion 21.
    [00018] Figure 8 illustrates the positional relationship between the second engagement portion 25 and the lowered engagement portion 15 when the cutting insert 10 is attached. As shown in figure 8, the hitch projection portion 25A of the second hitch portion 25 abuts against an inner wall of the specific hitch lowered portion 15. To facilitate insertion of the hitch projection portion 25A into the lowered hitch portion 15, the dimension of the engaging projection portion 25A is formed to be slightly smaller than the dimension of the recessed engaging portion 15. Furthermore, a shape of a part of the surface wall of the engaging projection portion 25A coincides with a shape of the recessed engagement portion 15, so that the engagement projection portion 25A can superficially contact the inner wall of the recessed engagement portion 15. The reinforcement portion 25B integrally formed with the engagement projection portion 25A does not come into contact at all with the first coupling portion 14.
    [00019] Then, effects obtained by the cutting tool with replaceable cutting edge of the present modality will be described below. When the cutting insert 10 receives the rotation movement caused by the cut resistance, a center of rotation becomes a contact portion between the second engaging portion 25 and the lowered engaging portion 15. Once the cutting tool 1 of the present modality includes only a contact portion described above, even if dimensional errors in manufacture are accumulated, the position of the contact portion only varies slightly within the inner wall face of the specific lowered coupling portion 15. Consequently, in the tool cutting edge 1 of the present embodiment, the position of the center of rotation of cutting insert 10 during processing remains almost unchanged. Therefore, an orientation of a reaction force acting on the cutting insert 10 from the second engagement portion 25 is maintained almost invariant.
    [00020] The second engagement portion 25 is formed in the first region RI on the base surface 21A so that the orientation of the rotation movement caused by the cut resistance can always be maintained invariant. In other words, when the second engagement portion 25 is formed in the region that is opposite the first region R1, as illustrated in figure 9B, the rotation movement MT by a push force T and a rotation movement MF by a force of F feed act in opposite directions from each other. Thus, when a magnitude relationship between the pushing force Tea and the feeding force F is changed during cutting processing, the rotation movement applied to the cutting insert 10 becomes zero for a second split, and a state of fixation of the insert cutting edge 10 becomes extremely unstable.
    [00021] On the other hand, according to the present modality, since the second engagement portion 25 is formed in the first region R1, as illustrated in figure 9A, the orientations of the rotation movement by the push force (T) and the feeding force (F) becomes the same. Therefore, the rotational movement in the same orientation is continued to be applied to the cutting insert 10 during the cutting process. Thus, the tightening or fixing state of the cutting insert 10 becomes stable.
    [00022] In addition, the engagement projection portion 25A is formed in the second region R2 positioned particularly far from the main cutting edge E in the first region R1, so that the rotational movement caused by the cut resistance around the portion of contact between the projection engaging portion 25A and the lowered engaging portion 15 is increased. As a result, the engagement projection portion 25A stably receives the rotational movement acting on the cutting insert 10 to also improve the clamping force.
    [00023] In addition, since a center of rotation of the cutting insert 10 is intentionally moved to the second region R2, a direction in which the cutting insert 10 tends to be moved in reception of the rotation movement caused by resistance to the the cut is directed in the direction to a region of intersection between the first and second side wall surfaces 21B, 21C of the insert mounting portion 21, as indicated by arrows in figures 7, 8. This direction is a direction in which a movement of the cutting insert 10 is effectively constrained by the first and second side wall surfaces 21B, 21C of the insert mounting portion 21.
    [00024] As described above, since the forming position of the second engagement portion 25 is planned for the cutting tool 1 of the present embodiment, the rotation of the cutting insert 10 can be effectively restricted, and an effect in which the first and second side wall surfaces 21B, 21C of the insert assembly portion 21 restrict the rotation of the cutting insert 10 is also maximized. (Second Mode)
    [00025] Figure 10B is an enlarged view showing an insert assembly portion of a body according to a second embodiment. As shown in figure 10B, an insert assembly portion 121 includes a shim 122, different from the first embodiment. In order to cover an internal base surface of the insert assembly portion 121, the shim 122 is formed in a shape almost identical to that of the base surface. One face of the shim 122 acts as the base surface 122A to support the lower surface 13 of the cutting insert 10. On the base surface 122A, a second engagement portion 125 having the same configuration as the second engagement portion 25 described above is formed. The forming position of the second engagement portion 125 is, in the first region RI on the base surface 122A of the shim 122, similarly to the first embodiment, and more preferably, in the second region R2. The insert assembly portion 21 includes the shim 122, so that material of the same can be changed to a different material from the material of the body 20 to improve the stiffness of the second engagement portion 125. The stiffness of the second engagement portion 125 is improved, so that the second coupling portion 125 can effectively and stably receive the rotation movement acting on the cutting insert 10. Also, in such a case in which the second coupling portion 125 there is any break, once Since only the shim 122 can be replaced, the second modality is economical compared to the first modality.
    [00026] The cutting tool with replaceable cutting edge of the present invention is not limited to the mode described above. The above described embodiment describes a case in which the first engagement portion 14 is defined by the recessed portion formed on the lower surface 13 of the cutting insert 10, and the second engagement portion 25 is formed on the base surface 21A and defined by a projection that can be received in a recessed portion, and be engaged with the part of the side wall surface to define a recessed portion. For example, in contrast to the mode described above, it can be configured that the first engagement portion 14 is defined by the projection formed on the lower surface 13 of the cutting insert 10, and the second engagement portion 25 is defined by the recessed portion that it is formed on the base surface 21 A, can receive a projection, and includes the engagement portion capable of being engaged with the part of the side wall surface to define the projection.
    [00027] Also with respect to the shape of the cutting insert, in addition to the positive type of the cutting insert, a negative type of the same, which has no positive clearance angle on the side surface can be adopted. In addition, the shape of the entire cutting insert is not particularly restricted and, thus, the cutting insert in various types of shapes can be adopted. For example, a type of C, a type of D, a type of S, a type of T, a type of W, a type of V and a type of Y, specified by "JIS-B4120- 1998" can also be adopted.
    [00028] The contour shape of the recessed portion defining the first engagement portion 14 provided for the cutting insert can have a simple shape, such as a circle or a rectangle. In this case, if the cutting insert has the property of rotational symmetry of "n" times symmetry ("n" is an integer of 2 or greater) with respect to its geometric axis, and also, a plurality of lowered hitch portions is formed, changing the corner of the cutting insert can be easily accomplished. When the recessed portion is shaped including recessed engaging portions similar to the embodiment described above, the number of recessed engaging portions is not particularly restricted. The number of the lowered hitch portions can be greater than, or less than 6, indicated in the above mentioned modality.
    [00029] Also like the projection defining the second coupling portion formed in the insert assembly portion, according to the mode described above, the projection includes only a coupling projection portion, but the number of the coupling projection portions can be two or higher. However, all of the hitch projection portions must be formed within the first region R1 on the base surface. It is still preferable that the shape described above in the embodiment, in other words, only a hitch projection portion is included and, in addition, the hitch projection portion is formed within the second region R2.
    [00030] Figure 11 is a perspective view illustrating another example of the cutting tool with replaceable cutting edge, on which the present invention can be applied. In the embodiment described above, a case in which the present invention is applied to a rotary tool is described as an example, but the present invention is not limited to it. As illustrated in figure 11, the present invention can be applied to the tome tool, where the cutting insert 10 is removably mounted on the initial end portion of a body 220. In this case, the second engagement portion is formed in the first region RI (region on the outer peripheral side) in a direction D1, towards which the first side wall surface 21B is facing, of the two regions on the base surface 21A divided by two by the virtual plane P similar to the modality described above. More preferably, in the second engagement portion, the stop portion for contacting the first engagement portion is formed in the second region R2 positioned on the side of the second side wall surface of the two regions divided by the virtual plane Q in the first region R1, in in other words, in the region on the side of the second side wall surface in a D2 direction (longitudinal direction of the body 220), towards which the second side wall surface faces.
    [00031] In the embodiment described above, a case in which the mounting hole is formed on the base surface of the insert mounting portion is described. However, the invention of the present application is not limited to the embodiment described above and the invention of the same can be applied to a case in which the cutting insert is fixed by a different fixation method other than the fixation method for fixing the cutting insert. by using the screw in the mounting hole on the base surface of the insert mounting portion.
    [00032] In the modality described above, a case in which the virtual planes P and Q pass the centroid of the cutting insert is described, but when the cutting insert has a specific shape, the virtual plans P and Q can pass the centroid from an upper surface (cutting face) of the cutting insert.
    [00033] Also, in the modality described above, a case in which the virtual planes P and Q pass through the centroid of the cutting insert is described, but instead of going through the centroid of the same, the virtual plans P and Q can pass through a center of an inscribed circle, inscribed in an external shape of the upper surface of the cutting insert.
    [00034] List of Reference Signs 1 ... Cutting tool with replaceable cutting edge 10 ... Cutting insert 11 ... Top surface 12 ... Side surface 13 ... Bottom surface 14 .. .First coupling portion 15 .... recessed coupling portion 16 ... curved projection portion 17 ... lower surface portion 18 ... mounting hole J ... central spindle E ... main cutting edge C ... Geometric axis of rotation 20 ... body 21 ... Insert assembly portion 21A ... Base surface 21B ... First side wall surface 21C ... Second side wall surface 23 ... Threaded hole AX1 ... Central shaft 25 ... Second hitch 25A ... Hitch projection portion 25B ... Relief portion 122 ... Shim 122A ... Base surface P ... First virtual plane Q ... Virtual background
    权利要求:
    Claims (11)
    [0001]
    1. Cutting tool with replaceable cutting edge (1), comprising: a plate-type cutting insert (10) comprising opposite upper and lower surfaces (11, 13) and a lateral surface (12) extending between the upper and lower surfaces; a body (20) including an insert mounting portion (21) for removably mounting the cutting insert (10), the insert mounting portion (21) having a base surface (21A) for supporting the bottom surface (13 ) of the cutting insert (10) and a side wall surface (21B, 21C) to support the side surface (12) of the cutting insert (10); and a receiving mechanism configured to receive a rotation movement, the rotation movement acting on the cutting insert (10) in order to rotate the cutting insert (10) mounted on the insert mounting portion (21) on the base surface (21A), wherein the receiving mechanism includes a first engagement portion (14) formed on the lower surface of the cutting insert (10) and a second engagement portion (25) formed on the base surface ( 21A) of the insert assembly portion (21), and wherein the second engagement portion (25) is formed to engage with a specific portion (15), of the surface defining the first engagement portion (14), to receive the rotational movement, characterized by the fact that the side wall surface of the insert mounting portion (21) includes a first side wall surface (21B) facing an external peripheral side of the cutting tool with replaceable cutting edge (1) and a second side wall surface 1 (21C) facing one side of the initial end of the cutting tool with replaceable cutting edge (1), and an engagement portion on the second engagement portion (25) to engage the first engagement portion (14) is formed in a first region (R1) on an opposite side from the side of the first side wall surface (21B), of two regions on the base surface (21A) divided by two by a first virtual plane (P) extending in a longitudinal direction of the body (20), the first virtual plane (P) being octagonal to the base surface (21A) and passing a center of the upper surface (11) of the cutting insert (10) mounted on the insert mounting portion (21), and the engagement portion on the second engagement portion (25) is formed in a second region (R2) positioned on the second side wall surface (21C) of two regions in the first region (R1) divided into two by a virtual second plane ( Q) which is orthogonal to the virtual foreground (P) and passes through the center of the surface su upper (11) of the cutting insert (10) mounted on the insert mounting portion (21).
    [0002]
    2. Cutting tool with replaceable cutting edge (1) according to claim 1, characterized by the fact that the first virtual plane (P) passes a centroid of the upper surface (11) of the cutting insert (10) mounted on the insert assembly portion (21).
    [0003]
    3. Cutting tool with replaceable cutting edge (1) according to claim 2, characterized by the fact that the second virtual plane (Q) passes the centroid of the upper surface (11) of the cutting insert (10) mounted on the insert assembly portion (21).
    [0004]
    4. Cutting tool with replaceable cutting edge (1) according to claim 1, characterized by the fact that the first virtual plane (P) passes a center of an inscribed circle, inscribed in an external shape of the upper surface (11 ) of the cutting insert (10) mounted on the insert assembly portion (21).
    [0005]
    5. Cutting tool with replaceable cutting edge (1) according to claim 4, characterized by the fact that the virtual plane (Q) passes the center of the inscribed circle.
    [0006]
    6. Cutting tool with replaceable cutting edge (1) according to any one of claims 1 to 5, characterized in that the insert assembly portion (21) has a shim (122) that is arranged between the body (20) and the cutting insert (10) and which defines the base surface, and in which the second engagement portion (25) is formed on the shim (122).
    [0007]
    Cutting tool with replaceable cutting edge (1) according to any one of claims 1 to 6, characterized in that the first engagement portion (14) is defined by a recessed portion formed on the lower surface (13 ) of the cutting insert (10), and in which the second engagement portion (25) is defined by a projection that is formed on the base surface (21A) and that can be received in the lowered portion and be engaged with a part of the side wall surface to define a recessed portion.
    [0008]
    Cutting tool with replaceable cutting edge (1) according to any one of claims 1 to 6, characterized in that the first engagement portion (14) is defined by a projection formed on the lower surface (13) of the cutting insert (10), and wherein the second engagement portion (25) is defined by a recessed portion that is formed on the base face (21A) and the recessed portion can receive the projection and includes an engagement portion able to be engaged with a part of the side wall surface to define projection.
    [0009]
    9. Cutting tool with replaceable cutting edge (1) according to any one of claims 1 to 8, characterized in that the first hitch portion (14) has a contour shape having a symmetry of “n” times ( "n" is an integer of 2 or greater) with respect to a geometric axis passing the center of the upper surface (11) of the cutting insert (10).
    [0010]
    10. Cutting tool with replaceable cutting edge (1) according to any one of claims 1 to 9, characterized in that the insert assembly portion (21) includes a mounting hole (23) that is formed on the base face (21A) for supporting the cutting insert (10), and in which the second engagement portion (25) is formed non-rotationally symmetrically with respect to a central geometric axis (AX1) of the mounting hole (23) .
    [0011]
    Cutting tool with replaceable cutting edge (1) according to any one of claims 1 to 10, characterized in that the first engagement portion (14) comprises a plurality of engagement portions (15) that are arranged at an equal interval along a circumference of a circle around a geometric axis (J) passing the center of the upper surface (11) of the cutting insert (10), each capable of being engaged with the second engagement portion (25).
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    引用文献:
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    法律状态:
    2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-02-11| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-09-15| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-12-08| 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 05/10/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2011-223446|2011-10-07|
    JP2011223054|2011-10-07|
    JP2011-223054|2011-10-07|
    JP2011223446|2011-10-07|
    PCT/JP2012/075998|WO2013051703A1|2011-10-07|2012-10-05|Cutting tool with replaceable blade edge|
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