• 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, cutter, and method of milling a workpiece a cutting insert includes two opposite end surfaces and a peripheral side surface extending between the two opposite end surfaces. the peripheral side surface includes two opposite main side surfaces connected to two smaller side surfaces opposite via side corner surfaces. a peripheral edge is formed at the intersection of each final surface with the peripheral side surface. each end surface has two raised corners with associated raised corner cutting edges and two recessed corners with associated lowered corner cutting edges. each corner side surface includes a concave spacing depression that serves as a relief surface for an associated recessed cutting edge. the concave clearance depression extends from its lowered cutting edge towards, but without intersecting, a raised corner associated with the opposite thin surface.
    公开号:BR112013003232B1
    申请号:R112013003232-4
    申请日:2011-08-05
    公开日:2020-06-16
    发明作者:Eric William Nguyen；William Bennett Johnson
    申请人:Ingersoll Cutting Tool Company；
    IPC主号:
    专利说明:

    CUTTING, MILLING INSERT, AND, MILLING METHOD A WORKING PIECE
    TECHNICAL FIELD
    [001] The present invention relates to tools for milling cutters. More particularly, it refers to cutters having inserts with lateral corner surfaces provided with concave spacing depressions.
    BACKGROUND OF THE INVENTION
    [002] Figures 1-4 show a cutting insert 500 from the prior art. This insert 500 has two identical end surfaces 502a, 502b. each of these surfaces 502a, 502b is provided with a support surface 504. A peripheral side surface 510 extends between the two opposite end surfaces 502a, 502b. The peripheral side surface 510 consists of two opposite main side surfaces 512a, 512b, two smaller opposite side surfaces 514a, 514b, and corner side surfaces 516a, 516b, 516c, 516d located between adjacent main side surfaces 512a, 512b and side surfaces minors 514a, 514b. A peripheral edge 520a, 520b is formed at the intersection of each end surface 502a, 502b and the peripheral side surface 510. The cutting insert 500 also includes a through hole 590 which passes through the opposite main side surfaces 512a, 512b.
    [003] In a larger side view of the cutting insert (see figure 3), each final surface 502a, 502b has four corners 530a, 530b, 530c, 530d, including two diagonally opposed recessed corners 530b, 530c.
    [004] The peripheral edges 420a, 520b include two sets of cutting edges. As seen in Figure 1, each set includes a high-edge cutting edge 540b associated with a first main side surface 516b, a main-cutting edge 542b adjacent to the high-corner cutting edge 540b and extending along a first main side surface 512b , and an eccentric edge of raised corner 544b
    Petition 870190131157, of 10/12/2019, p. 7/55 / 14 adjacent to the sharp-edged cutting edge 540b. The raised corner eccentric edge 544b extends along the first minor side surface 514b which shares the first corner side surface 516b with the first main side surface 512b.
    [005] Mills having these cutting inserts 500 of the prior art retained in them, cut either in the perpendicular direction or in the horizontal direction with central cut. When attempting to cut on a ramp using a cutter with such cutting inserts of the prior art, a blind edge of the cutting insert 500 scratches the workpiece, due to the cutting insert 500 not having free space. In this way, the part to be cut is deformed and potentially hardened, and the life of the cutting insert 500 is reduced.
    SUMMARY OF THE INVENTION
    [006] In one aspect, the present invention relates to a cutting insert 100 for use in a cutter. The cutting insert of the invention comprises:
    two identical opposite end surfaces 102a, 102b, each end surface being provided with a support surface 104;
    a peripheral side surface 110 extending between two opposite end surfaces 102a, 102b, the peripheral side surface comprising two main opposite side surfaces 112a, 112b, its minor opposite side surfaces 114a, 114b and corner side surfaces 116a, 116b, 116c, 116d located between main and minor peripheral lateral surfaces;
    a peripheral edge 120a, 120b formed at the intersection of each end surface 102a, 102b and the peripheral side surface 110;
    each final surface 102a, 102b having four corners 130a, 130b, 130c, 130d including two diagonally opposite recessed corners 130a, 130d and two diagonally opposite raised corners 130b, 130c, the recessed corners 130a, 130d being closer than the elevated corners 130b , 130c with respect to a median plane M of the cutting insert, whose median plane M passes through
    Petition 870190131157, of 10/12/2019, p. 8/55 / 14 of the main and minor side surfaces 112a, 112b, 114a, 114b and halfway between the final surfaces 102a, 102b.
    [007] In the cutting insert, at least one peripheral edge 120a comprises two sets of cutting edges, each set of cutting edges comprising:
    a raised corner sharp edge 140b associated with a first corner side surface 116b;
    a main cutting edge 142b adjacent to the high corner cutting edge 140b and extending along a first main side surface 112b;
    an eccentric high corner edge 144b adjacent to the high corner cutting edge 140b and extending along a first minor side surface 114b that shares the first corner side surface 116b with the first main side surface 112b; a recessed cutting edge 140a associated with a second lateral side surface 116a, the second lateral side surface 116a and the first lateral side surface 116b sharing the first minor side surface 114b; and a recessed corner eccentric edge 146a adjacent to the recessed corner cutting edge 140a and extending along a first minor side surface 114b towards the raised recessed corner 144b; and each side corner surface 116a, 116b, 116c, 116d is provided with concave spacing depression 150 extending from the lowered corner cutting edge 140a, beyond the median plane M and in the direction of, but without intersecting, an edge high corner cutting edge 130c associated with the opposite peripheral edge 120b, the concave spacing depression 150 forming a relief surface 152 for the lowered corner cutting edge 140a and being visible in both the main and side lateral views
    Petition 870190131157, of 10/12/2019, p. 9/55 / 14 smaller than the cutting insert.
    [008] In another aspect, the present invention relates to a milling cutter
    200 comprising a cutter body 220 comprising a plurality of insert cavities 210 and a plurality of cutting inserts 100, each cutting insert retained in one of the plurality of insert cavities 210, each cutting insert being according to the insert of cut described above.
    [009] In yet another aspect, the present invention relates to a method of milling a workpiece. The method comprises: (a) providing the aforementioned milling cutter 200; and (b) moving the cutter simultaneously in the axial direction and in the transverse direction, in relation to the workpiece, to thereby form a ramp on an axially facing surface of the workpiece, the ramp having a peripheral edge, so that at least a portion of a ramp peripheral edge of the ramp be accommodated within the concave spacing depression. when the cut edge of the lowered corner digs the aforementioned ramp peripheral edge during rotation of the cutter.
    BRIEF DESCRIPTION OF THE DRAWINGS
    [0010] For a better understanding of the present invention and to show how it can be carried out in practice, reference will now be made to the attached drawings, in which:
    figure 1 shows a perspective view of a prior art cutting insert;
    figure 2 shows a final view of a prior art cutting insert;
    figure 3 shows a larger side view of a prior art cutting insert;
    figure 4 shows a minor side view of a prior art cutting insert;
    Figure 5 shows a perspective view of an insert
    Petition 870190131157, of 10/12/2019, p. 10/55 / 14 cut according to an embodiment of the present invention;
    figure 6 shows a final view of the cutting insert of figure 5;
    figure 7 shows a larger side view of the cutting insert of figure 5;
    figure 8 shows a smaller side view of the cutting insert of figure 5;
    figure 9 shows a top view of a 2 inch (5.1 cm) diameter cutter with the cutting insert of figure 5 retained therein;
    figure 11 shows a side view of the cutter in figure 10;
    figure 12 shows a top view of the cutter in figure 10;
    figure 13 shows a first isometric view of a 1.25 inch (3.2 cm) diameter cutter with the cutting insert of figure 5 retained therein;
    figure 14 shows a second isometric view of the cutter in figure 13;
    figure 15 shows a cutter mounted on a spindle and having two cutting inserts of figure 5 retained therein;
    figures 17a and 17b show different isometric views of two different tool arcs superimposed on a concave spacing depression of the cutting insert of figure 5.
    DETAILED DESCRIPTION
    [0011] Figures 5-8 show a cutting insert 100 for use in a cutter according to the present invention. Figure 5 shows the main surfaces of the cutting insert 100 better. The cutting insert 100 has two identical end surfaces 102a, 102b. each end surface 102a, 102b is provided with a support surface 104. A peripheral side surface 110 extends between the two opposite main side surfaces 102a, 102b. THE
    Petition 870190131157, of 10/12/2019, p. 11/55 / 14 peripheral side surface 110 consists of two opposite main side surfaces 112a, 112b, two smaller opposite side surfaces 114a, 114b, and corner side surfaces 116a, 116b, 116c, 116d located between adjacent main side surfaces 112a, 112b and smaller side surfaces 114a, 114b. A peripheral edge 120a, 120b is formed at the intersection of each end surface 102a, 102b and the peripheral side surface 110. The cutting insert 100 also includes a through hole 190 that passes through the opposite main side surfaces 112a, 112b. In other embodiments, the through hole may otherwise pass through the opposite end surfaces 102a, 102b.
    [0012] As seen in figure 7, a median plane (M) of the cutting insert 100 crosses the main and minor side surfaces 112a, 112b, 114a, 114b 102a, 102b. As best seen in Figures 5 and 7, a first axis A1 passes through the opposite main side surfaces 112a, 112b. A second axis A2 is perpendicular to the first axis A1 and passes through both end surfaces 102a, 102b. A third axis A3 is perpendicular to both the first axis A1 and the second axis A2 and traverses the opposite minor side surfaces 114a, 114b. In one embodiment, the cutting insert 100 has 180 ° rotational symmetry around the three axes A1, A2, A3. In another embodiment, the cutting insert 100 has the same symmetry around only one or two of the axes A1, A2, A3.
    [0013] As best seen in figure 6, each final surface 102a, 102b has four corners 130a, 130b, 130c, 130d including two diagonally opposed recessed corners 130a, 130b and two diagonally opposite raised corners 130b, 130c. The diagonally opposed recessed corners 130a, 130b are closer to the median plane M of the cutting insert than the diagonally opposed raised corners 130b, 130c.
    [0014] The peripheral edges 120a, 120b include at least one set of cutting edges. Figure 9 illustrates an embodiment of a
    Petition 870190131157, of 10/12/2019, p. 12/55 / 14 set of cutting edges on a peripheral edge 120a, 120b of the cutting insert 100 on a cutter 200 of the present invention. Preferably, the peripheral edges 120a, 120b include two sets of cutting edges. Each set of cutting edges includes a primary subset of "external" cutting edges and a secondary subset of "internal" cutting edges. During ramp forming operations, the primary cutting edge subset forms a cut of the outer diameter of a workpiece 400. The secondary subset forms a cut of the inner diameter of the workpiece 400.
    [0015] As seen in Figures 5 and 9, the primary cutting edge subset includes a raised sharp cutting edge 140b associated with a first corner sharp surface 116b, a leading cutting edge 142b adjacent to the raised sharp cutting edge 140b and extending along a first main side surface 112b, and an eccentric raised corner edge 544b 144b extends along a first minor side surface 114b that shares the first corner side surface 116b with the first main side surface 112b. The secondary subset of cutting edges includes a recessed cutting edge 140a associated with a second lateral edge surface 116a and an eccentric recessed edge 146a adjacent to the recessed cutting edge 140b. The second corner side surface 116a and the first corner side surface 116b are both adjacent to the first minor side surface 114b. The recessed corner eccentric edge 146a extends along the first minor side surface 114b towards the raised eccentric edge 144b.
    [0016] As shown in figures 5, 7 and 8, each side corner surface 116a, 116b, 116c, 116d of the cutting insert 100 is provided with a concave spacing depression 150. In one embodiment, the spacing depression concave 150 is formed by cutting to the
    Petition 870190131157, of 10/12/2019, p. 13/55 / 14 manufacture the cutting insert 100. It should be understood, however, that multiple axis punches can be used to press a green body having concave spacing depressions, after which the green body is sintered. [0017] The concave spacing depression 150 extends from the cutting edge of the lowered corner 140a, beyond the median plane M and in a direction of, but not intersecting, a corresponding raised corner 130c associated with the opposite end surface 102b. The concave spacing depression 150 forms a relief surface 152 for the recessed cutting edge 140a and is visible in both the major and minor side views of the cutting insert 100. As seen at least in figures 5 and 7, one end of the concave spacing depression 150 meets the recessed corner cutting edge 140. However, the opposite end 150b of the concave spacing depression 150 does not meet the opposite raised corner 130c.
    [0018] Each of the concave spacing depressions 150 is asymmetrical around the median plane M. In addition, the third axis A3 does not intersect any of the concave depressions 150 formed on the side surfaces of corner 116a, 116b, 116c, 116d.
    [0019] The height Hc (shown in figure 7) of the concave spacing depression 150 is measured along a direction between the recessed cutting edge 140a and the raised corner 130c associated with the opposite end surface 102b. In one embodiment, the height Hc of the hollow depression 150 has at least 50-95% of a distance d between the recessed cutting edge 140a and the raised corner 130c associated with the opposite end surface 102b. In one embodiment, the greater depth Dc (shown in figure 7) of the concave spacing depression 150, taken from the imaginary tangent line of an imaginary “uncut” side surface, can vary from 6-12% of the height Hc of concave spacing depression 150.
    [0020] In one embodiment, the cutting insert 100 of the present
    Petition 870190131157, of 10/12/2019, p. 14/55 / 14 invention can be retained on more than one type of cutter 200. Cutter 200 does not have to be specially designed for ramp cutting of a workpiece 100. Instead, cutter 200 can be a normal cutter in which the cutting insert 100 can be retained to ramp a workpiece 400. However, in other embodiments, the cutter 200 can instead be a specialized cutter used to ramp a workpiece 400. In some embodiments, the cutting insert 100 is indexable on the milling cutter 200 and, in some embodiments, it is formed to be indexable in 4 ways on a milling cutter 200.
    [0021] Figures 10-12 show an embodiment of a normal 2-inch (5.1 cm) diameter cutter having a plurality of cavities 210, one of which is shown to have the cutting insert 100 tangentially seated and retained in it. It should be understood that, during actual use, each of the five cavities 210 of this cutter 250 would have a cutting insert 100 retained therein. As best seen in Fig. 11, during cutting operations, the operating sharp edge cutting edge 140b sweeps an OD outside diameter, while the operating lowered edge cutting edge 140a sweeps an ID cutting diameter. However, the concave spacing depression 150 of the cutting insert provides relief to the recessed cutting edge 140a of the cutting insert 100 and, during ramp forming operations, accommodates a portion of the workpiece 400 which is illustrated in the figures 10-12 as a ring-shaped path that enters the concave spacing depression 150.
    [0022] Figures 13-15 show an embodiment of a normal cutter 260 of 1.25 inches (3.2 cm) in diameter having a plurality of cavities 210, one of which is shown to have a cutting insert 100 tangentially seated and retained in it. Again, it should be understood that, during actual use, each of the four cavities 210 of this milling cutter 260 would have a cutting insert 100 retained therein. As best viewed in the
    Petition 870190131157, of 10/12/2019, p. 15/55 / 14 figure 15, during cutting operations, the operating sharp edge cutting edge 140b sweeps an outer cutting diameter Do, while the operating sharp edge cutting edge 140a sweeps an ID cutting inner diameter. However, the concave spacing depression 150 of the cutting insert provides relief to the recessed cutting edge 140a of the cutting insert 100 and, during ramp forming operations, accommodates a portion of the workpiece 400 which is illustrated in the figures 13-15 as a ring-shaped path that enters the concave spacing depression 150.
    [0023] Figure 16 illustrates a cross-sectional view of a cutter 290 mounted on a spindle 300 and cutting a workpiece 430. As it cuts, the cutter 200 rotates in a direction R around the axis of rotation of the cut Ac extending along an axial (or “Z”) direction of workpiece 430. In a ramp-forming operation, cutter 290 moves simultaneously in both the “Z” axial and transverse (or “X”) to form an air ramp angle (shown in figure 16 with reference to ramp arrow 600), to thereby form a ramp 602 over workpiece 400. Ramp 602 comprises a ramp surface generally axially facing 604 defined by circumferential ramp 606 peripheral edge. Thus, with each rotation, the cutter 290 moves deeper (axially) into the workpiece 400 and also in a transverse direction. As seen in Figure 16, the ramp 602 is maximum in the portion following the peripheral edge of the ramp 606. In addition, it should be understood that, in an axial view along the “Z” axis, the ramp surface 604 has a generally Circular.
    [0024] The first and second cutting inserts 100a, 100b are seen in cross section in figure 16, which can be a 1.25 inch (3.2 cm) device cutter having four equally spaced insert holes. It should be understood, therefore, that additional cutting inserts (not shown) can also be fitted to cutter 290. The first cutting insert 100a, whose inoperative final surface 102b is visible in figure 16, has a subset
    Petition 870190131157, of 10/12/2019, p. 16/55 / 14 cutting edge primer (hidden from view in figure 16). In the cross-section shown, the primary operating cutting edge subset (140b, 142b, 144b) of the first cutting insert 100a is cutting an axially-facing leading portion 434 of workpiece 430. However, the second cutting insert 100b has a secondary operating subset of sharp edges (140a, 140b) which, in the shown cross section, is scraping a follower portion of the ramp peripheral edge 606 and also an axially facing follower portion 436 of workpiece 430.
    [0025] In the cross section seen in figure 16, cutter 290 cuts new material from workpiece 430 in the cross direction “X” using the primary subset of cutting edges (ie, the sharp corner cutting edge 140b not shown 140b, the main cutting edge 142b, the eccentric high corner edge 144b () of the first cutting insert 100a, with the operative high corner cutting edge 540b operative 140b making initial contact at a point P in the cross section shown.
    [0026] The secondary subset of cutting edges (i.e., the unseen recessed corner cutting edge and the recessed edged corner edge 146a) of the first cutting insert 100a are generally not cutting workpiece 430 in the position shown. However, as soon as the first cutting insert 100a rotates beyond the position shown in figure 16, its secondary cutting edge operative subset begins to cut a peripheral edge of the rising ramp 602 (the ramp ascending in the “+ X” direction in the shown cross section ) with the depth of cut increasing until the ramp 602 reaches a maximum height in the diametrically opposite position occupied by the second cutting insert 100b in figure 16. Then, the cutting depth of the secondary cutting edge operating subset belonging to the first cutting insert cut 100a decreases (as the ramp height decreases in the “-X” direction in the shown cross section) until the first cut insert 100a once again reaches the position in which it appears in figure 16. Thus,
    Petition 870190131157, of 10/12/2019, p. 17/55 / 14 in one embodiment, except possibly in the momentary position occupied by the first cutting insert 100a as seen in figure 16, the secondary subset of cutting edges operative belonging to all cutting inserts excavate the ramp 602 completely at each 360 ° rotation of cutter 290.
    [0027] Because the workpiece 400 is not cut centrally, but is instead cut in a ramp, the ramp 602 is higher than the position of the secondary cutting edge operative subset belonging to the second cutting insert 100b, and the highest in the segment following the peripheral edge of the ramp 606. During ramp formation operations, the concave spacing depression 150 receives a portion of the peripheral edge of the ramp 606, thus providing a relief surface 152 for the cutting edge of the recessed operating corner 140a of the inserts, when the peripheral edge of the ramp 606 is excavated.
    [0028] Generally speaking, the air ramp angle with which the cutter 290 cuts the workpiece 430 is determined by the maximum cutting depth of the cut-off sharp edge 140a and the internal diameter DI of the cutting insert 100, when seated on cutter 290. In general, the air ramp angle and the internal diameter Di have an inverse relationship, the larger the internal diameter Di of the cutter 290, the smaller the maximum air ramp angle. Thus, in a set of embodiments, the maximum air ramp angle of a 1.25 inch (3.2 cm) diameter milling cutter is 1.75 degrees, while the maximum air ramp angle of a cutter 50 of 2 inches in diameter is 0.75 degrees.
    [0029] Figures 17a & 17b show the cutting insert 100 in relation to the Ti tool arc created by the 1.25 inch (3.2 cm) milling cutter 260 and the T2 tool arch created by the 2 inch milling cutter 250 ( 5.1 cm). The tool arcs T1 and T2 represent the internal diameter Di of their respective cutters 260 and 250. Figure 17b provides a slightly isometric view
    Petition 870190131157, of 10/12/2019, p. 18/55 / 14 different from tool arcs T1 and T2. To create the concave spacing depression 150 in the cutting insert 100, the cut formed from the cutting insert 100 during manufacture must take into account the tool arcs of the cutters on which the cutting insert will be seated. In some embodiments, the hollow depression 150 is not a cylindrical surface. In one embodiment, to minimize the amount of material removed to create the concave spacing depression 150. the shape of the cut formed is not a single radius through the cut.
    [0030] As seen in figures 17a & 17b, the tool arc T1 of the 1.25 inch (3.2 cm) diameter cutter 260 extends deeper into the cutting insert 100 than the tool arch T2 of the cutter 250 of 2 inches (5.1 cm) in diameter. However, the tool arc T2 created by the 2-inch (5.1 cm) diameter cutter 250 extends within the concave spacing depression 150 along a greater length of the corresponding side corner surface 116a than the tool arc T1 created by the 2-inch (5.1 cm) diameter cutter 260. However, the cutting insert 100 can be provided with a concave spacing depression 150 of sufficient height and depth to accommodate both tool arcs and thus be used on cutters of both sizes for ramp forming operations. Even so, it should be understood that a cutting insert can be formed with concave spacing depressions 150 having just enough height and depth to be used on only one cutter. It should also be understood that the concave spacing depression 150 of the cutting insert can be formed to accommodate cutters of other sizes as well.
    [0031] Although the present invention has been described with reference to one or more specific embodiments, the description is intended to be illustrative throughout and should not be considered as limiting the invention to the embodiments shown. It should be appreciated that several modifications may occur to someone skilled in the art, although not shown
    Petition 870190131157, of 10/12/2019, p. 19/55 / 14 specifically here, will, however, be within the scope of the invention.
    权利要求:
    Claims (12)
    [1]
    1. Cutting insert (100) for use in milling cutters, comprising:
    two identical opposite end surfaces (102a, 102b), each of which is provided with a contact surface (104);
    a peripheral side surface (110) extending between the two opposing thin surfaces (102a, 102b), the peripheral side surface comprising two opposing main side surfaces (112a, 112b), two opposing minor side surfaces (114a, 114b) and lateral surfaces corner (116a, 116b, 116c, 116d) located between adjacent main and minor side surfaces;
    a peripheral edge (120a, 120b) formed at the intersection of each end surface (102, 102b) and the peripheral side surface (110);
    each final surface (102a, 102b) having four corners (130a, 130b, 130c, 130d) including two diagonally opposite recessed corners (130a, 130d) and two diagonally opposite raised corners (130b, 130c), the recessed corners (130a, 130d) ) being closer than the raised corners (130b, 130c) to a median plane (M) of the cutting insert, whose median plane (M) passes through the major and minor side surfaces (112a, 112b, 114a, 114b ) and halfway between the final surfaces (102a, 102b);
    on what:
    at least one peripheral edge (120a) comprises two sets of cutting edges, each set of cutting edges comprising:
    a raised corner cutting edge (140b) associated with a first corner side surface (116b);
    a main cutting edge (142b) adjacent the raised corner cutting edge (140b) and extending along a first main side surface (112b);
    Petition 870190131157, of 10/12/2019, p. 21/55
    [2]
    2/4 a lowered corner cutting edge (140a) associated with a second corner side surface (116a), the second corner side surface (116a) and the first corner side surface (116b) sharing the first smaller side surface (114b);
    characterized by the fact that each set of cutting edges also comprises:
    a raised corner eccentric edge (144b) adjacent to the raised corner cutting edge (140b) and extending along a smaller first side surface (114b) that shares the first corner side surface (116b) with the first side surface main (112b);
    a recessed corner eccentric edge (146a) adjacent to the recessed corner cutting edge (140a) and extending along the first minor side surface (114b) towards the raised corner eccentric edge (144b);
    where each side corner surface (116a, 116b, 116c, 116d) is provided with a concave spacing depression (150) that extends from the lowered corner cutting edge (140a), beyond the median plane (M) and in the direction of, but without intersecting, a raised corner cutting edge (130b) associated with the opposite peripheral edge (120b), the concave spacing depression (150) forming a raised surface (152) for the corner cutting edge recessed (140a) and being visible in both the main and minor side views of the cutting insert.
    2. Cutting insert (100) according to claim 1, characterized by the fact that:
    the cutting insert comprises a through hole (190) between the opposite main side surfaces (112a, 112b).
    [3]
    3. Cutting insert (100) according to claim 1, characterized by the fact that:
    the cutting insert has 180 ° rotational symmetry around
    Petition 870190131157, of 10/12/2019, p. 22/55
    3/4 a first axis (A1) that passes through the opposite main side surfaces (112a, 112b).
    [4]
    4. Cutting insert (100) according to claim 3, characterized by the fact that:
    the cutting insert has 180 ° rotational symmetry around a second axis (A2) perpendicular to the first axis (A1) and passing through both end surfaces (102a, 102b).
    [5]
    5. Cutting insert (100) according to claim 4, characterized by the fact that:
    the cutting insert has 180 ° rotational symmetry around a third axis (A3) perpendicular to both the first axis (A1) and the second axis (A2), and passes through the opposite minor side surfaces (114a, 114b).
    [6]
    6. Cutting insert (100) according to claim 1, characterized by the fact that:
    the cutting insert has 180 ° rotational symmetry around a third axis (A3) that passes through the opposite minor side surfaces (114a, 114b).
    [7]
    7. Cutting insert (100) according to claim 6, characterized by the fact that:
    the third axis (A3) does not intersect any of the concave depressions (150) formed on the lateral corner surfaces (116a, 116b, 116c, 116d).
    [8]
    8. Cutting insert (100) according to claim 1, characterized by the fact that:
    a height (Hc) of the concave spacing depression (150), taken along a direction between the cutting edge of the lowered corner (140a) and the raised corner (130c) associated with an opposite end surface (102b) is at least 50-90% of a distance d between the cutting edge of
    Petition 870190131157, of 10/12/2019, p. 23/55
    4/4 lowered corner (140a) and the raised corner (130c) associated with the opposite peripheral edge (102b).
    [9]
    9. Cutting insert (100) according to claim 1, characterized by the fact that:
    each of the concave depressions (150) be asymmetrical around the median plane (M).
    [10]
    10. Milling cutter (200), characterized by the fact that it comprises:
    a cutter body (220) comprising a plurality of insert cavities (210); and a plurality of cutting inserts (100), each cutting insert retained in one of the plurality of insert cavities (210), wherein each cutting insert conforms to the cutting insert as defined in claim 1.
    [11]
    11. Milling cutter (200) according to claim 10, characterized by the fact that:
    each cutting insert (100) will be tangentially seated and retained in its insert cavity (210).
    [12]
    12. Method of milling a workpiece, characterized by the fact that it comprises:
    providing a cutter (200) as defined in claim 10; and moving the cutter simultaneously in both axial and transverse directions, in relation to the workpiece, to thereby form a ramp on an axially facing surface of the workpiece, the ramp having a peripheral edge, so that at least a portion of the peripheral edge of the ramp is accommodated within the concave spacing depression of a cutting insert, as the cut edge of the lowered corner digs the peripheral edge of the ramp during the rotation of the cutter.
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    CN103189156A|2013-07-03|
    EP2603339B1|2017-05-03|
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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]|
    2019-09-17| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-04-28| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-06-16| 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 05/08/2011, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US12/855,965|2010-08-13|
    US12/855,965|US8449230B2|2010-08-13|2010-08-13|Cutting insert having concave clearance depressions formed on corner side surfaces|
    PCT/US2011/046824|WO2012021414A1|2010-08-13|2011-08-05|Cutting insert having concave clearance depressions formed on corner side surfaces|
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