• 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:
    REMOVABLE CUTTING INSERT, AND CUTTING TOOL. In a cutting tool that has a removable cutting insert (20) with four cutting portions (26a, 26b, 26c, 26d), the cutting insert can be secured within a support portion in four movement positions by means of of a fastener. The cutting insert has two opposite extreme surfaces (22) with a peripheral side surface (24) and a central axis (c) extending between them, the peripheral side surface having exactly four contact zones 28a, 28b, 28c, 28d. The insert support (42) has a support portion (46) and a body portion (48), the support portion having a side wall surface with a first, second and third reaction zone. The cutting insert is divided into four imaginary quadrants around the central axis, and the four contact zones are located entirely in two of the four imaginary quadrants, and for each movement position three of the four contact zones are in contact with each other. the three reaction zones
    公开号:BR112013006947B1
    申请号:R112013006947-3
    申请日:2011-10-04
    公开日:2020-07-28
    发明作者:Gil Hecht
    申请人:Iscar Ltd；
    IPC主号:
    专利说明:

    Field of the Invention
    [0001] The present invention relates to metal cutting tools for use in turning, notching, partitioning, and filleting operations, which have a removable cutting insert with a plurality of cutting portions. Background of the Invention
    [0002] In the field of metal cutting tools used in turning, notching, partitioning, and filleting operations, cutting inserts that can be removably attached to an insert holder have long been provided with a way of perform a cutting operation with suitably hard material, ie cemented carbide, in the vicinity of the cutting edge, where the insert support, made of a less hard material is reusable after the disposal of a used or damaged cutting insert.
    [0003] This type of cutting tool was further developed to use removable cutting inserts with an increased number of cutting edges, providing economic benefits by providing an increased number of cutting operations per cutting insert. This type of cutting tool has also been developed to provide a more stable and secure means of retaining the removable insert within the insert holder.
    [0004] US 6,612,207 describes a removable cutting drill, which has four cutting parts and four prismatic chambers. As shown in figure 2 of this Patent, each prismatic chamber includes two spaced contact locations, where, for each position of movement of the cutting bit in a support element, three of the eight spaced contact locations are in contact with three corresponding surfaces in upper and lower projections protruding from the front of the support element.
    [0005] US 5,203,648 describes a removable cutting insert, which has a substantially square shape, with four cutting edges. The cutting edges are arranged on a first pair of opposite sides of the cutting insert, where each of the opposite sides has a pair of cutting edges separated by an intermediate contact surface. Additional contact surfaces perpendicular to the intermediate contact surfaces are located on a second pair of opposite sides of the cutting insert. For each position of movement of the cutting insert within an insert holder, one of the intermediate contact surfaces and one of the additional contact surfaces are in clamping contact with the insert holder.
    [0006] US 6,942,434 describes a removable cutting insert, which has two opposite side surfaces and a peripheral edge surface that extends between them. The peripheral side surface has five contact sections and five cutting portions equally spaced. For each position of movement of the cutting insert within an insert pocket of an insert holder, two of the five contact sections contact upper and lower holder walls of the insert pocket. The upper and lower support walls form an acute angle that diverges in one direction towards the operational cutting portion of the cutting insert.
    [0007] US 7,597,508 describes a removable cutting insert that has two opposite end surfaces and a peripheral side surface located between the end surfaces. The peripheral side surface is divided into five identical segments, each segment having a cutting section, a conductive wall and a rear wall. For each position of movement of the cutting insert within a front fixing portion of an insert holder, front and rear walls of three consecutive segments respectively contact and support against the first, second and third supports of a fixing surface of the cutting portion. front attachment. The first and second supports diverge downwards and the second and third supports diverge backwards.
    [0008] It is an object of the present invention to provide an improved removable cutting insert and cutting tool.
    [0009] It is also an objective of the present invention to provide a removable cutting insert, which can be manufactured efficiently.
    [00010] It is another objective of the present invention to provide a removable cutting insert, which has a contact ratio equal to 1.0, measured by dividing the number of contact zones on a peripheral lateral surface by the number of cutting portions.
    [00011] It is yet another objective of the present invention to provide a removable cutting insert, where the number of angles associated with the relative positioning of the contact zones is minimized.
    [00012] It is another objective of the present invention to provide a cutting tool where, for each movement position, the removable cutting insert can be retained in a safe and stable manner within an insert holder.
    [00013] It is yet another object of the present invention to provide a cutting tool, where the structural configuration of the insert holder prevents the cutting insert from being pulled from the insert holder in a forward direction during a cutting operation. Summary of the Invention
    [00014] According to the present invention, a removable cutting insert is provided, which comprises two opposite extreme surfaces, with a peripheral lateral surface and a central axis extending between them.
    [00015] The cutting insert having four cutting portions and exactly four contact zones apart, each of the four contact zones representing a region distinct from the peripheral lateral surface capable of making clamping contact with a corresponding region of a conjugation component , in at least one position of movement of the cutting insert, in which the cutting insert is divided into four imaginary quadrants around the central axis, and in which the four contact zones are entirely located within two of the four imaginary quadrants.
    [00016] Also according to the present invention there is provided a cutting tool comprising a removable cutting insert, with four cutting portions, an insert holder and fastener, the cutting insert having two opposite opposite surfaces, with a surface peripheral side and a central axis extending between them, the peripheral side surface having exactly four separate contact zones apart, the insert support having a support portion and a body portion, the support portion having a wall surface side with a first, second and third reaction zone, the cutting insert can be attached within the support portion in any of the four movement positions by means of the fastener, in which the cutting insert is divided into four imaginary quadrants along around the central axis, and the four contact zones are located entirely in two of the four imaginary quadrants, and in which, for each movement position, three of the four contact zones are in contact with the three reaction zones. Brief Description of Drawings
    [00017] For a better understanding, the invention will now be described by way of example only, with reference to the accompanying drawings, in which dashed lines in the chain represent clipping limits for partial views of an element, and in which: figure 1 it is a perspective view of a cutting insert according to some embodiments of the present invention; figure 2 is a side view of the cutting insert shown in figure 1; figure 3 is an exploded perspective view of a cutting tool according to some embodiments of the present invention; figure 4 is a side view of a cutting tool shown in figure 3; figure 5 is a first perspective view of an insert holder according to some embodiments of the present invention; figure 6 is a second perspective view of the insert holder according to some embodiments of the present invention; and figure 7 is a side view of the cutting tool shown in figure 3 without a fastener. Detailed Description of the Invention
    [00018] Attention is first drawn to figures 1 and 2, which show a removable cutting insert 20, which can be manufactured to form, compress and sinter a cemented carbide such as tungsten carbide, and can be coated or uncoated .
    [00019] The removable cutting insert 20 has two opposite end surfaces 22 with a peripheral side surface 24 and a central axis C extending between them, and four cutting portions 26a, 26b, 26c, 26d. The peripheral side surface 24 has exactly four contact zones 28a, 28b, 28c, 28d, thus providing the removable cutting insert 20 with a contact ratio Ra equal to 1.0, measured by dividing the number of contact zones by the number of contact zones. cutting portions, which is beneficial in terms of manufacturing efficiency. Each of the four contact zones 28a, 28b, 28c, 28d represents a region distinct from the peripheral lateral surface 24 that makes clamping contact with a corresponding region of a coupling component in at least one moving position of the removable cutting insert 20 .
    [00020] In some embodiments of the present invention the two opposite extreme surfaces 22 may be identical.
    [00021] Also, in some embodiments of the present invention, each of the two opposite end surfaces 22 may include a raised support surface 30 perpendicular to the central axis C. The two raised support surfaces 30 represent the outermost portions of the removable cutting insert 20 , in a direction parallel to the central axis C, and make it possible for the same removable cutting insert 20 to be used in both left and right cutting tools.
    [00022] As shown in figure 2, the removable cutting insert 20 is divided into four imaginary quadrants Q1, Q2, Q3, Q4 around the central axis C, with the four contact zones 28a, 28b, 28c, 28d being entirely located within two Ql, Q3 of the four imaginary quadrants Ql, Q2, Q3, Q4.
    [00023] In some embodiments of the present invention the four contact zones 28a, 28b, 28c, 28d can be flat. For these modalities, each of the four contact zones 28a, 28b, 28c, 28d can be parallel to the central axis C.
    [00024] Alternative embodiments of the present invention (not shown) can include a cutting insert that has a peripheral side surface with four non-flat contact zones. For these modalities, each contact zone can have an outward convex shape.
    [00025] For modalities where the four contact zones 28a, 28b, 28c, 28d are flat, each of the four contact zones 28a, 28b, 28c, 28d can form an external contact angle at less than 180 ° with another of the four contact zones 28d, 28c, 28b, 28a. For these modalities the four contact zones 28a, 28b, 28c, 28d are typically configured in pairs in opposing imaginary quadrants first and third Q1, Q3 where, as shown in figure 2, a pair of first and fourth contact zones 28a, 28d forming the external contact angle l is entirely located in the first quadrant Q1 and a pair of second and third contact zones 28c, 28c which form the same external contact angle l is entirely located in the third quadrants Q3. Typically, in these embodiments, an external contact angle A1 having a value between 60 ° and 140 ° is preferred.
    [00026] There are benefits associated with this way of configuring the four contact zones 28a, 28b, 28c, 28d in relation to manufacturing efficiency, where only three angles associated with the relative position of the four contact zones 28a, 28b, 28c , 28d are necessary to be controlled during the manufacturing process; the external contact angle al between the first and fourth contact zones 28a, 28d, the external contact angle al between the second and third contact zones 28b, 28c, and an internal contact angle a2 between the first and second contact zones 28a, 28b.
    [00027] It should be appreciated that the use of the term "internal angle" and "external angle" throughout the description and claims, refers to an angle between two flat surface components or zones as measured internal and external to the element on the which surface components or zones are formed, respectively.
    [00028] In some embodiments of the present invention the four cutting portions 26a, 26b, 26c, 26d can be identical, each cutting portion 26a, 26b, 26c, 26d having a cutting edge 32a, 32b, 32c, 32d formed by intersection of an outlet surface 34a, 34b, 34c, 34d and a raised surface 36a, 36b, 36c, 36d, the four outlet surfaces 34a, 34b, 34c, 34d and the four raised surfaces 36a, 36b, 36c, 36d located on the peripheral lateral surface 24.
    [00029] In a side view of the removable cutting insert 20, as shown in figure 2, each of the four cutting portions is separated from that closest to the four contact zones 28a, 28b, 28c, 28d.
    [00030] In some embodiments of the present invention the four cutting edges 32a, 32b, 32c, 32d can extend in a direction generally parallel to the central axis C.
    [00031] In some embodiments of the present invention, as shown in figure 2, the removable cutting insert 20 may have mirror symmetry around a first PI plane that contains the central axis C. For these modalities the first PI plane can bisect the first and third imaginary quadrants QI, Q3 within which the four contact zones 28a, 28b, 28c, 28d are entirely located, and each of the four outlet surfaces 34a, 34b, 34c, 34d can generally be closer to the first PI plane than its associated relief surface 36a, 36b, 36c, 36d.
    [00032] In some embodiments of the present invention, as shown in figure 2, the removable cutting insert 20 may have mirror symmetry around a second plane P2 that contains a central axis C and perpendicular to the first plane Pl.
    [00033] For modalities where the removable cutting insert 20 has mirror symmetry around the first and second planes Pl and P2, the removable cutting insert 20 performing 180 ° rotation around the central axis C, 180 ° rotation along around a first axis Al located in the first plane P and perpendicular to the central axis C, or 180 ° of rotation around a second axis A2 located in the second plane P2 and perpendicular to the central axis C.
    [00034] Also, for modalities where the removable cutting insert 20 has mirror symmetry around the first and second planes Pl, P2, the peripheral side surface 24 can include two pairs of identical opposite side surfaces 38a, 38b, a first pair of mirrored symmetrical opposite side surfaces 38a around the foreground Pl which includes the four relief surfaces 36a, 36b, 36c, 36d and a second pair of mirrored symmetrical opposite side surfaces 38b around the second plane P2 which includes the four outlet surfaces 34a, 34b, 34c, 34d and the four contact zones 28a, 28b, 28c, 28d. The four cutting edges 32a, 32b, 32c, 32d can be formed at the intersections between the first and second pairs of opposite side surfaces 38a, 38b.
    [00035] There are benefits associated with this way of configuring the four outlet surfaces 34a, 34b, 34c, 34d with respect to manufacturing efficiency, in which four outlet surface forming pins (not shown), slidably positioned in a cutting insert mold cavity (not shown) before forming by pressing the cemented carbide and slidingly retracted from the cutting insert mold cavity, and after forming by compressing the cemented carbide, it may only require the operation of two linear actuators (not shown) that have a direction of travel perpendicular to the background P2, where two output surface forming pins are associated with each linear actuator.
    [00036] For modalities where the removable cutting insert 20 has mirror symmetry around the first and second planes Pl, P2 and each of the four contact zones 28a, 28b, 28c, 28d is parallel to the central axis C, the first contact zone 28a is parallel to the third contact zone 28c and a second contact zone 28b is parallel to the fourth contact zone 28d.
    [00037] Attention is now drawn to figures 3 and 4 showing a straight cutting tool 40 comprising removable cutting insert 20, a right insert holder 42 and a fixer 44.
    [00038] The right insert holder 42, which can also be left, to provide a left cutting tool (not shown) has a support portion 42 and a body portion 48, with the cutting insert 20 being fastened inside the support portion 46 by means of fastener 44.
    [00039] In some embodiments of the present invention, the insert support 42 can be made of hardening steel, and the support portion 46 can also be rigid and non-resilient.
    [00040] As shown in figures 3 to 6, the support portion 46 has an insert pocket comprising a base surface 63 and a side wall surface 50. This side wall surface 50 is provided with a first second and third reaction zones 52, 54, 56 and a cutting insert (20) are secured within the support portion 42 in four different movement positions where, for each movement position three of the four contact zones 28a, 28b, 28c, 28d are in contact with the three reaction zones 52, 54, 56. Also, for each movement position an interstice G is typically formed between one of the four contact zones 28a, 28b, 28c, 28d and the side wall surface 50, and no other region or zone on the surfaces of the removable cutting insert 20 that generally extend in the same direction as the central axis C are in contact with the support portion 46.
    [00041] In some embodiments of the present invention the first, second and third reaction zones 52, 54, 56 may be non-planar, typically having an outward convex shape as an alternative embodiment of the present invention (not shown) may include a support of insert that has a side wall surface with three flat reaction zones.
    [00042] Figure 4 shows the cutting insert 20 stuck within the support portion 46 in a first movement position, where the first contact zone 28a is in fixing contact with the first reaction zone 52, the second contact 28b is in clamping contact with the second reaction zone 54, the third contact zone 28c is in contact with the third reaction zone 56 and the gap G is formed between the fourth contact zone 28d and the side wall surface 50.
    [00043] In some embodiments of the present invention the body portion 48 may extend longitudinally away from the support portion 46 in a backward direction R, and the first and second reaction zones 52, 54 may also diverge in the backward direction R. For these modalities, as shown in figure 4, an operational cutting portion 26d of the removable cutting insert 20 protrudes away from the support portion 46 in a forward direction F, opposite to the back direction R, and a force cutting edge Fc acts on the operational cutting portion 26d during the cutting operation of a workpiece (not shown) in a transverse direction and the backward and forward directions R, F. For modalities where the cutting force Fc is directed in a generally downward direction and transverse to the backward and forward directions R, F, as shown in figure 4, the first reaction zone 52 is located on the side wall surface 50 and an upper projection 58 of the support portion 46 d and such second and third reaction zones 54, 56 are located on the side wall surface 50 on a lower projection 60 of the support portion 46, where the lower projection 60 is positioned in a downward direction D relative to the upper projection 58.
    [00044] There are benefits associated with this way of configuring the cutting tool 40 in relation to retaining the removable cutting insert 20 inside the insert holder 42 in a safe and stable manner, in which for each moving position of the cutting insert removable 20 the cutting force Fc reinforces the clamping contact between three of the four contact zones 28a, 28b, 28c, 28d and the three reaction zones 52, 54, 56 and also the first and second divergent reaction zones 52, 54 physically prevent the removable cutting insert 26 from being pulled from the insert holder 42 in the forward direction F.
    [00045] In some embodiments of the present invention as shown in figure 4, one of the two raised support surfaces 30 is in contact with the base surface 62 of the insert pocket of the support portion 46 where the base surface 62 extends in a direction transverse to the side wall surface 50.
    [00046] Also, in some embodiments of the present invention, the removable cutting insert 20 may include a central hole 64 coaxial with the central axis C extending between and opening to the two opposite extreme surfaces 22. For these embodiments, as shown in Figures 3 and 4, the fastener 44 can be in the form of a fastening screw 66 which extends through the central hole 64 and engages a threaded hole 68 in the base surface 62 of the support portion 46. For these modalities, as shown in figure 7, the threaded hole 68 can be eccentric in relation to the central hole 64, with a thread axis T of the threaded hole 68 being positioned on an imaginary line L in the forward and downward direction F, D, in relation to the axis center C. Tightening the fixing screw 66 into the threaded hole 68 forces the removable cutting insert 20 in the forward and downward direction F, D, thus ensuring fixing contact between three of the four contact zones 28a, 28b, 28c , 28d, and the three reaction zones 52, 54, 56.
    [00047] Although the present invention has been described to a certain degree of particularity, it should be understood that several changes and modifications could be made without departing from the spirit or scope of the invention as claimed hereinafter.
    权利要求:
    Claims (14)
    [0001]
    1. Removable cutting insert (20), comprising two opposite extreme surfaces (22) with a peripheral side surface (24) and a central axis (C) extending between them, the cutting insert (20) having four portions cutting edge (26a, 26b, 26c, 26d), four spaced contact zones (28a, 28b, 28c, 28d), and mirror symmetry around a foreground (Pl) and a second plane (P2) mutually perpendicular containing the central axis (C), with each cutting portion (26a, 26b, 26c, 26d) having a cutting edge (32a, 32b, 32c, 32d) formed by the intersection of an exit surface (34a, 34b, 34c, 34d) and a relief surface (36a, 36b, 36c, 36d), with the four exit surfaces (34a, 34b, 34c, 34d) and the four relief surfaces (36a, 36b, 36c, 36d) located on the peripheral lateral surface (24), each of the four contact zones (28a, 28b, 28c, 28d) representing a region distinct from the peripheral lateral surface (24) capable of making clamping contact with a corresponding region of a conjugation component in at least one position of movement of the cutting insert (20), where: the peripheral side surface (24) includes two pairs of identical opposite side surfaces (38a, 38b), a first pair of opposite side surfaces (38a) has mirror symmetry around a first plane (Pl), and a second pair of opposite side surfaces (38b) has mirror symmetry around a second plane (P2); the four cutting edges (32a, 32b, 32c, 32d) are formed at the intersection between the two pairs of opposite side surfaces (38a, 38b) and the second pair of opposite side surfaces (38b) includes the four relief surfaces (36a , 36b, 36c, 36d) and the four contact zones (28a, 28b, 28c, 28d), characterized by the fact that: each of the four contact zones (28a, 28b, 28c, 28d) is flat; and, each of the four flat contact zones (28a, 28b, 28c, 28d) forms an external contact angle (al) less than 180 ° with another of the four flat contact zones (28d, 28c, 28b, 28A) .
    [0002]
    2. Removable cutting insert (20) according to claim 1, characterized in that in a side view of the cutting insert (20) each of the four cutting portions (26a, 26b, 26c, 26d) is separated closest to the four contact zones (28a, 28b, 28c, 28d).
    [0003]
    3. Removable cutting insert (20) according to claim 1, characterized by the fact that each of the four contact zones (28a, 28b, 28c, 28d) is parallel to the central axis (C).
    [0004]
    4. Removable cutting insert (20) according to claim 1, characterized by the fact that the external contact angle (al) has a value between 60 ° and 140 °.
    [0005]
    5. Removable cutting insert (20) according to claim 1, characterized by the fact that it is divided into four imaginary quadrants (Ql, Q2, Q3, Q4) around the central axis (C), and the four zones contact points are entirely located within two (Ql, Q2) of the four imaginary quadrants (Ql, Q2, Q3, Q4).
    [0006]
    6. Removable cutting insert (20) according to claim 5, characterized by the fact that the four contact zones (28a, 28b, 28c, 28d) are entirely located in the first and third imaginary quadrants (Ql, Q3) and the first plane (Pl) bisects the first and third imaginary quadrants (Ql, Q3).
    [0007]
    7. Removable cutting insert (20) according to claim 1, characterized by the fact that each exit surface (34a, 34b, 34c, 34d) is closer to the foreground (Pl) than its associated relief surface ( 36a, 36b, 36c, 36d).
    [0008]
    Removable cutting insert (20) according to claim 1, characterized in that, in a side view, each of the four contact zones (28a, 28b, 28c, 28d) forms a V with an adjacent zone of the four contact zones (28d, 28c, 28b, 28a).
    [0009]
    9. Cutting tool (40), comprising a removable cutting insert (20) with four cutting portions (26a, 26b, 26c, 26d), an insert holder (42) and a fastener (44), the insert cutting edge (20) having two opposite extreme surfaces (22) with a peripheral side surface (24) and a central axis (C) extending between them, the insert support (42) having a support portion (46) and a body portion (48), the support portion (46) having a side wall surface (50), the cutting insert (20) being secured within the support portion (46) in any of four position positions. movement by means of the fixator (44), and having mirror symmetry around a first plane (Pl) and a second plane (P2) mutually perpendicular containing the central axis (C), characterized by the fact that: the lateral surface peripheral (24) has exactly four contact zones (28a, 28b, 28c, 28d) distinct and spaced from each other; the side wall surface (50) has first, second and third reaction zones (52, 54, 56); the cutting insert (20) is divided into four imaginary quadrants (Ql, Q2, Q3, Q4) around the central axis (C) and the four contact zones (28a, 28b, 28c, 28d) are located entirely in two (Ql, Q3) of the four imaginary quadrants (Ql, Q2, Q3, Q4); and, for each movement position, three of the four contact zones (28a, 28b, 28c, 28d) are in contact with the three reaction zones (52, 54, 56).
    [0010]
    Cutting tool (40) according to claim 9, characterized by the fact that the cutting insert (20) comprises the individual characteristics as defined in any of claims 2 to 8.
    [0011]
    Cutting tool (40) according to claim 9, characterized by the fact that the insert support body portion (48) extends longitudinally away from the support portion (46) in a backward direction (R) and the first and second reaction zones (52, 54) diverge in the backward direction (R).
    [0012]
    Cutting tool (40) according to claim 9, characterized by the fact that: each of the two opposite ends of the cutting insert (22) includes a raised support surface (30) perpendicular to the central axis (C); and, one of the two raised support surfaces (30) is in contact with a base surface (62) of the support portion (46), the base surface (62) extending in a direction transverse to the side wall surface (50).
    [0013]
    13. Cutting tool (40) according to claim 12, characterized in that: the cutting insert (20) comprises a central hole (64) that extends between and opens out of the two opposite extreme surfaces (22 ); the fastener (44) is in the form of a fastening screw (66) which extends through the central hole (64) of the cutting insert (20) and which engages a threaded hole (68) on the base surface (62) of the support portion (46); and, the threaded hole (68) is eccentric in relation to the central hole (64).
    [0014]
    14. Cutting tool (40) according to claim 9, characterized in that the insert holder (42) is of one-piece unit construction
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    ES2633722T3|2017-09-25|
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    PL3195963T3|2021-12-27|
    IL208826D0|2011-01-31|
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    法律状态:
    2018-12-26| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-11-26| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-06-23| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-07-28| 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 04/10/2011, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    IL208826|2010-10-20|
    IL208826A|IL208826A|2010-10-20|2010-10-20|Cutting tool and cutting insert therefor|
    PCT/IL2011/000772|WO2012052984A1|2010-10-20|2011-10-04|Cutting tool and cutting insert therefor|
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