• 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. The disclosed cutting insert makes it possible to drill or drill without the formation of a pilot hole in the workpiece. The cutting edge includes a cutting edge section that extends from the outside of the cutting tool body towards the center line of the cutting tool when the cutting edge is mounted on a fixing seat. Said section of cut reaches a foreground, which includes the central line, and crosses from side to side of a second plane that is orthogonal to the foreground and includes the central line.
    公开号:BR112012021098B1
    申请号:R112012021098-0
    申请日:2010-03-31
    公开日:2021-01-19
    发明作者:Takashi Yamaguchi
    申请人:Tungaloy Corporation；
    IPC主号:
    专利说明:

    Technical Field
    [0001] The present invention relates to a cutting insert and a cutting tool provided with it. Prior Art
    [0002] Several cutting inserts suitable for drilling and drilling have been proposed (See Patent Literature 1 to 4, for example). Patent Literature Citation List
    [0003] PTL 1: JP Patent No. 3812478 PTL 2: JP Patent No. 2712580; PTL 3: JP Patent No. 3448578; PTL 4: JP Patent No. 4385519. Summary of the Invention Technical Problem
    [0004] However, with respect to the cutting insert as disclosed in Patent Literature 1 to 4 described above, a prepared hole needs to be formed in a workpiece previously in opening holes and drilling. Therefore, a request was made to reduce the number of cases.
    [0005] The present invention was carried out in view of the problem described above and has the objective of providing a cutting insert and a cutting tool, capable of opening holes and drilling without the formation of a prepared hole in a workpiece.
    [0006] Solution to the Problem
    [0007] A cutting insert according to the present invention is removably affixed to a cutting tool body assembly seat, and has an inclined face, a flank, and a cutting edge formed in a portion of intersection between the inclined face and the flank, the cutting edge comprises a cutting edge portion that extends from an outer peripheral side to a central axis side of the cutting tool body when the cutting insert is attached to the mounting seat, the cutting edge portion reaches a first plane including the central axis and crosses from one side to the other side of the second plane, and the second plane is perpendicular to the first plane and includes the central axis.
    [0008] Preferably, the inclined face includes a first inclined face formed on a first surface and a second inclined face formed on a second surface; the flank includes a first flank and a second flank formed on a lateral surface extending between the first surface and the second surface; the cutting edge includes a first cutting edge formed at an intersecting portion between the first inclined face and the first flank, and a second cutting edge formed at an intersecting portion between the second inclined face and the second flank; and the first and second cutting edges include the cutting edge portions, respectively. In addition, the first and second flanks are formed so as to have positive release angles, respectively. In addition, the first cutting edge and the second cutting edge have rotational symmetry on at least one axis perpendicular to the central axis of the cutting insert. In addition, the first and second cutting edges have corner cutting edge portions formed in corner portions between the first and second surfaces, respectively, and each cutting edge portion is continuous from each of the cutting edges. corner cutting edge.
    [0009] More preferably, the cutting edge portion is slanted in a direction away from a plane perpendicular to the central axis of the cutting insert and passing through the corner portion, and moves away from the cutting edge portion of corner.
    [00010] A cutting tool according to the present invention has a cutting insert having an inclined face, a flank, and a cutting edge formed at an intersecting portion between the inclined face and the flank and a cutting tool body. cutting edge having a mounting seat to which the cutting insert is removably attached, the cutting edge comprises a cutting edge portion extending from an outer peripheral side to a central axis side of the cutting tool body cutting when the cutting insert is attached to the mounting seat, the cutting edge portion reaches a foreground including the central axis and crosses from one side to the other side of the second plane, and the second plane is perpendicular to the foreground and includes the central axis.
    [00011] Preferably, the cutting tool body mounting seat is formed so that the cutting insert tilts in first and second directions perpendicular to each other so that it additionally ensures the release between the cutting insert affixed to the mounting seat and a work piece. Advantageous Effects of the Invention
    [00012] According to the present invention, opening holes or drilling can be carried out without the formation of a prepared hole, and the number of machining processes can be reduced. Brief Description of Drawings
    [00013] Fig. 1 is a perspective view of a cutting tool according to an embodiment of the present invention; Fig. 2 is a side view of the cutting tool in Fig. 1; Fig. 3 is a view of the cutting tool in Fig. 1 seen from a direction of a central axis; Fig. 4 is a perspective view of a cutting insert of a embodiment according to the embodiment of the present invention; Fig. 5 is a plan view of the cutting insert in Fig. 4; Fig. 6 is a side view of the cutting insert in Fig. 4; Fig. 7 is a cross-sectional view in the direction of line VII-VII in Fig. 5; Fig. 8 is a view illustrating the relationship between a machined hole and the cutting insert and a view of the cutting tool partially including a section of a workpiece when viewed from a central axis direction; and Fig. 9 is a view illustrating the relationship between a machined hole and the cutting insert and a section view of a workpiece and cutting tool when viewed from above the cutting insert. Description of Modalities
    [00014] An embodiment of the present invention will be described with reference to Figs. 1 to 9.
    [00015] A cutting tool 30 illustrated in Figs. 1 to 3 includes a cutting tool body 31 and a cutting insert 10. In relation to this cutting tool 30, a workpiece positioned on a reference surface perpendicular to the central axis J of the cutting tool 30 is cut and machined by a cutting insert 10 by rotating the workpiece. However, a user can affix the cutting tool 30 to a central axis of the machine tool such as a machine center and by rotating it around a central axis J in order to machine the workpiece without rotating the workpiece. job.
    [00016] In relation to the cutting tool body 31 of the cutting tool 30, the body of the cutting tool 31 is formed having a cylindrical shape and has a mounting seat 32 on the side of the distal end portion thereof and a surface reference plane 31f which is perpendicular to a reference surface perpendicular to the central axis J described above and which is parallel to the central axis J on the side of the base end portion. The cutting insert 10 is attached to the mounting seat 32. The cutting insert 10 is fixed to the body of the cutting tool 31 by a BT screw. A structure of the mounting seat 32 will be described later.
    [00017] The cutting insert 10 is formed of a material such as, for example, cemented carbide. This cutting insert 10 is, as illustrated in Figs. 4 to 7, a plate-like member having an approximately square outer shape. This cutting insert 10 has a through hole 16 formed concentric to a central axis K to insert the screw BT through it and fix the cutting insert 10 to the body of the cutting tool 31.
    [00018] On a top surface (first surface) of the cutting insert 10, a reference surface 10A formed from a plane perpendicular to the central axis K and an upper inclined face (first inclined face) 11A are formed. On a bottom surface (second surface) of the cutting insert 10, a reference surface 10fB formed from a plane perpendicular to the central axis K and a lower inclined face (second inclined face) 11B are formed.
    [00019] On a lateral surface extending between the top surface and the bottom surface of the cutting insert 10, an upper flank (first flank 12A) intersecting with the upper sloping face 11A and a lower flank (second flank) 12B intersecting with the lower sloping face 11B are formed. The upper flank 12A and the lower flank 12B are formed in a way that they have positive release angles, respectively. The upper flank 12A extends from the upper sloping face 11A to the bottom surface, while the lower flank 12B extends from the lower sloping face 11B to the top surface.
    [00020] An upper cutting edge (first cutting edge) 13A is formed at an intersecting portion between the upper inclined face 11A and the upper flank 12A. A lower cutting edge (second cutting edge) 13B is formed at an intersecting portion between the lower inclined face 11B and the lower flank 12B.
    [00021] The upper cutting edge 13A is, as illustrated in Fig. 3, includes a portion of upper cutting edge 13A_1 extending from the outer peripheral side to the side of the central axis J, of the cutting tool body 31 in a state affixed to the mounting seat 32 of the cutting tool body 31. However, the upper cutting edge portion 13A has an upper corner cutting edge portion 13A_2 formed in two corner portions of the top surface, and this upper corner cutting edge portion 13A_2 is continuous with the upper cutting edge portion 13A_1.
    [00022] The upper cutting edge portion 13A_1 reaches a first plane PL1 including the central axis J, crosses from side to side of a second plane PL2 perpendicular to the first plane PL1 and including the central axis J. specifically, as illustrated in Fig. 3, the top cutting edge portion 13A_1 extends approximately parallel on one side of the second PL2 plane from the side of the upper corner cutting edge portion 13A_2 to the central axis J and in a position P1 close to central axis J, intersects with the second plane PL2, and reaches the first plane PL1 through the other side of the second plane PL2. That is, as illustrated in Fig. 3, when the cutting insert 10 is attached to the body of the cutting tool 31, a part of the upper cutting edge portion 13A_1 is formed to pass below the central axis.
    [00023] In addition, the upper cutting edge portion 13A_1 is, as shown in Fig. 6, angled in a direction away from a plane P3 perpendicular to the central axis J of the cutting insert 10 and passing through the edge portion top corner cutting edge 13A_2, while moving away from the top corner cutting edge portion 13A_2. In addition, the upper cutting edge 13A is rotationally symmetrical 180 degrees with respect to the central axis K.
    [00024] The lower cutting edge 13B is configured in the same way as the upper cutting edge 13A and includes a lower cutting edge portion 13B_1 corresponding to the upper cutting edge portion 13A_1 and a lower corner cutting edge portion 13B_2 corresponding to a top corner cutting edge portion 13A_2. Then, the lower cutting edge portion 13B_1 is, as shown in Fig. 6, angled in a direction away from a plane PL4 perpendicular to the central axis J of the cutting insert 10 and passing through the corner cutting edge portion bottom 13B_2, while moving away from the lower corner cutting edge portion 13B_2. In addition, the lower cutting edge 13B is rotationally symmetrical 180 degrees over the central axis K.
    [00025] In addition, the upper cutting edge 13A and the lower cutting edge 13B are rotationally symmetrical 180 degrees about an AX1 axis and an AX2 axis. Here, the axis AX1 and the axis AX2 are perpendicular to each other and are included in a plane passing through the middle between the reference surface 10fA on the top surface and a reference surface 10fB on a bottom surface. That is, the AX1 axis and the AX2 axis are perpendicular to the central K axis.
    [00026] The upper cutting edge 13A and the lower cutting edge 13B are rotationally symmetrical 180 degrees over the axis AX1 and the axis AX2.
    [00027] A tool user can use both of the two upper cutting edge portions 13A_2 of the upper cutting edge 13A by rotating the cutting insert 10 configured as above by 180 degrees with respect to the mounting seat 32. In addition, the The user can use both two lower cutting edge portions 13A_2 per rotation of the cutting insert 10 by 180 degrees on the axis AX1 or the axis AX2 with respect to the mounting seat 32. That is, on the cutting insert 10, its flanks 12A and 12B have positive release angles, but four corner cutting edge portions 13A_2 and 13B_2 are used.
    [00028] In addition, a mounting seat face 33 of the mounting seat 32 on the cutting tool body 31 is, as illustrated in Fig. 2, tilted only by an angle α1 with respect to the central axis J in a plane including the central axis J is perpendicular to the reference surface 31f of the cutting tool body 31 so that the release between the cutting insert 10 affixed to the mounting seat 32 and the workpiece is additionally ensured. In addition, the mounting seat face 33 is, as shown in Fig. 3, tilted only by an angle α2 with respect to a second plane PL2 in a plane perpendicular to the central axis J.
    [00029] Subsequently, machining using the cutting tool configured as above will be described by reference to Figs. 8 and 9.
    [00030] In Figs. 8 and 9, a prepared hole is not formed in a workpiece 100, but when the cut progresses in a direction of the central axis J through the opening of holes through the turning of the cutting insert 10 affixed to the body of the cutting tool 31, a portion positioned below the central axis of rotation J on the upper cutting edge 13A_1 functions as a central edge, and a machined hole 101 is machined.
    [00031] An internal peripheral face of the machined hole 101 is cut by the upper corner cutting edge portion 13A_2. A bottom portion 102 of the machined hole 101 is cut tapered by the upper cutting edge portion 13A_1.
    [00032] As described above, according to the cutting tool according to this modality, as the machined orifice 101 can be machined without the formation of the prepared orifice, the number of processes in opening orifices is reduced.
    [00033] In the modality described above, the case where the cutting insert 10 is rotationally symmetrical by 180 degrees with respect to the central axis K has been described. However, the modality is not limited to the case, and the case may not have rotational symmetry. In addition, the case where the upper and lower cutting edges of the cutting insert 10 have rotational symmetry with respect to the axes AX1 and AX2 has been described, but the present invention can also be applied to a case of rotational symmetry with respect to only one axis or a case that does not have rotational symmetry.
    [00034] In the modality described above, the case has been described as an example, where the shape of the cutting edge is sloped so that it extends in parallel with the periphery of the PL2 plane to the periphery of the central axis J and in order to pass below the central axis J at the periphery of the central axis J. however, the present invention is not limited to this. For example, the shape of the cutting edge may be such that it extends from an outer peripheral side to the side of the central axis J in a direction away from the PL2 plane and then changes its direction and extends towards the plane PL2 and finally, it passes below the central axis J. Industrial Applicability
    [00035] The cutting insert and the cutting tool according to the present invention can be applied to the opening of holes and drilling.
    权利要求:
    Claims (3)
    [0001]
    1. Cutting insert (10) removably attached to a mounting seat (32) of a cutting tool body (31), comprising: an inclined face (11) comprising a first inclined face (11A) formed in a first surface, and a second inclined face (11B) formed on a second surface; the first surface being a top surface of the cutting insert (10) and the second surface being a bottom surface of the cutting insert (10); a flank (12) comprising a first flank (12A) and a second flank (12B) formed on a side surface extending between the first surface and the second surface; and a cutting edge (13) comprising a first cutting edge (13A) formed at an intersecting portion between the first inclined face (11A) and the first flank (12A); and a second cutting edge (13B) formed at an intersecting portion between the second inclined face (11B) and the second flank (12B), where the cutting edge (13) comprises a cutting edge portion (13_1) extending from an outer peripheral side to a central axis side (J) of the cutting tool body (31) when the cutting insert (10) is attached to the mounting seat (32), the edge portion cutting edge (13_1) reaches a first plane (PL1) including the central axis (J) and crosses from side to side of a second plane (PL2), and the second plane (PL2) is perpendicular to the first plane (PL1) and includes the central axis (J); wherein the cutting insert (10) is rotationally symmetrical 180 degrees with respect to a central axis (K) of the cutting insert (10), which is defined to be perpendicular to a reference surface (10fA) of the first surface and a reference surface (10fB) of the second surface; and the first and second cutting edges (13A, 13B) being rotationally symmetrical 180 degrees on a first axis (AX2), which is perpendicular to the central axis (K); the first cutting edge (13A) has a corner cutting edge portion (13A_2) formed in a corner portion of the first surface; and a cutting edge portion (13A_1), which is continuous from the corner cutting edge portion (13A_2); and the second cutting edge (13B) has a corner cutting edge portion (13B_2) formed in a corner portion of the second surface; and a cutting edge portion (13A_1), which is continuous from the corner cutting edge portion (13B_2); characterized by the fact that: the cutting edge portion (13A_1, 13B_1), on each of the first and second cutting edges (13A, 13B), is tilted in a direction away from an imaginary foreground (PL3, PL4 ) perpendicular to the central axis (K) of the cutting insert (10) and passing through the corresponding corner cutting edge portion (13A_2, 13B_2), while moving away from the corner cutting edge portion (13A_2, 13B_2 ) corresponding; and the first flank (12A) and the second flank (12B) are formed so as to have positive release angles, respectively.
    [0002]
    2. Cutting tool (30), characterized by the fact that it comprises: a cutting insert (10) as defined in claim 1; and a cutting tool body (31) having a mounting seat (32) to which the cutting insert (10) is removably attached.
    [0003]
    Cutting tool (30) according to claim 2, characterized in that the mounting seat (32) of the cutting tool body (31) is formed so that the cutting insert (1) tilts in first and second directions perpendicular to each other in a way that additionally guarantees the release between the cutting insert (10) affixed to the mounting seat (32) and a work piece.
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    BR112012021098A2|2016-05-17|
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    RU2518833C1|2014-06-10|
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    法律状态:
    2019-01-15| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-10-15| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-12-08| 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: 10 (DEZ) ANOS CONTADOS A PARTIR DE 19/01/2021, OBSERVADAS AS CONDICOES LEGAIS. |
    2021-04-06| B21F| Lapse acc. art. 78, item iv - on non-payment of the annual fees in time|Free format text: REFERENTE A 11A ANUIDADE. |
    2021-05-11| B24D| Patent annual fee: restoration after fee payment|
    优先权:
    申请号 | 申请日 | 专利标题
    PCT/JP2010/055959|WO2011121780A1|2010-03-31|2010-03-31|Cutting insert and cutting tool|
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