WO2023228741A1 - 切削工具及び切削加工物の製造方法 - Google Patents

切削工具及び切削加工物の製造方法 Download PDF

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Publication number
WO2023228741A1
WO2023228741A1 PCT/JP2023/017559 JP2023017559W WO2023228741A1 WO 2023228741 A1 WO2023228741 A1 WO 2023228741A1 JP 2023017559 W JP2023017559 W JP 2023017559W WO 2023228741 A1 WO2023228741 A1 WO 2023228741A1
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Prior art keywords
insert
cutting
tip
cutting tool
pocket
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Application number
PCT/JP2023/017559
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English (en)
French (fr)
Japanese (ja)
Inventor
寛久 石
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京セラ株式会社
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Priority to JP2024523025A priority Critical patent/JPWO2023228741A1/ja
Publication of WO2023228741A1 publication Critical patent/WO2023228741A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C3/00—Milling particular work; Special milling operations; Machines therefor
    • B23C3/12—Trimming or finishing edges, e.g. deburring welded corners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/02—Milling-cutters characterised by the shape of the cutter
    • B23C5/06—Face-milling cutters, i.e. having only or primarily a substantially flat cutting surface

Definitions

  • the present disclosure relates to a cutting tool and a method for manufacturing a cut workpiece.
  • a chamfer cutter described in JP-A-2021-74798 As a cutting tool, for example, a chamfer cutter described in JP-A-2021-74798 (Patent Document 1) is known.
  • a chamfer cutter described in JP-A-2021-74798 (Patent Document 1) is known.
  • Poisson burrs side burrs
  • Poisson burrs are likely to occur near both ends of the chamfered surface, especially on the side where the cutting edge was in contact with the cutting edge until just before it separated from the workpiece.
  • a Poisson burr is placed near the top of the chamfered surface if the axial rake is positive, and near the bottom of the chamfered surface if the axial rake is negative. often occurs.
  • the chamfer cutter described in Patent Document 1 has a V-shaped cutting edge.
  • the V-shaped cutting edge has an inner cutting edge portion, an outer cutting edge portion, and a bent cutting portion located therebetween.
  • the flow of chips due to cutting is directed toward the bent cutting blade portion, so it is possible to suppress the occurrence of Poisson burrs at the edge of the chamfered surface formed by cutting.
  • the chamfered surface may have a convex shape, which poses a problem in terms of processing accuracy.
  • the method of suppressing the occurrence of Poisson burrs by having the cutting edge have a bent cutting part as in Patent Document 1 lacks versatility in so-called insert-type cutting tools.
  • the cutting edge has a curved cutting portion
  • the optimum value of the curved cutting portion that suppresses the occurrence of Poisson burrs changes depending on the machining diameter of the workpiece, in other words, the outer diameter of the cutting tool.
  • restrictions will be added to processing conditions. That is, when preparing a repertoire of a plurality of cutting tools having different outer diameters, it is necessary to prepare an optimal insert for each cutting tool.
  • a cutting tool includes a main body that extends from a tip toward a rear end along a rotation axis, and has a first pocket and a second pocket located on the side of the tip, and a first pocket. a first insert located in the second pocket and having a first cutting edge; and a second insert located in the second pocket and having a second cutting edge.
  • the axial rake of the first insert is positive and the axial rake of the second insert is negative.
  • FIG. 2 is a plan view of the cutting tool shown in FIG. 1 viewed from the X1 direction.
  • FIG. 2 is a plan view of the cutting tool shown in FIG. 1 viewed from the X2 direction.
  • FIG. 2 is a plan view of the cutting tool shown in FIG. 1 viewed from the X3 direction.
  • 3 is an enlarged view of region Y1 shown in FIG. 2.
  • FIG. 4 is an enlarged view of region Y2 shown in FIG. 3.
  • FIG. 5 is an enlarged view of region Y3 shown in FIG. 4.
  • FIG. 5 is an enlarged view of region Y4 shown in FIG. 4.
  • FIG. It is a side view which shows the cutting tool based on 2nd Embodiment.
  • FIG. 10 is an enlarged view of region Y5 shown in FIG. 9.
  • FIG. 10 is an enlarged view of region Y5 shown in FIG. 9 viewed from the X4 direction.
  • FIG. It is a schematic explanatory view showing one process of a manufacturing method of a cutting workpiece concerning an embodiment. It is a schematic explanatory view showing one process of a manufacturing method of a cutting workpiece concerning an embodiment. It is a schematic explanatory view showing one process of a manufacturing method of a cutting workpiece concerning an embodiment. It is a schematic explanatory view showing one process of a manufacturing method of a cutting workpiece concerning an embodiment.
  • each figure referred to below shows only the main members necessary for explaining each embodiment in a simplified manner. Therefore, the cutting tool of the present disclosure may include any component not shown in each referenced figure. Further, the dimensions of the members in each figure do not faithfully represent the dimensions of the actual constituent members and the dimensional ratios of each member.
  • the cutting tool 1A is a so-called rotary tool that rotates in a rotation direction O2 around a rotation axis O1, as shown in a non-limiting example shown in FIG.
  • rotary tools include milling tools and end mills.
  • One non-limiting example rotary tool shown in FIG. 1 is a milling tool.
  • the rotation axis O1 is an axis around which the cutting tool 1A rotates, and is not included in the cutting tool 1A (main body portion 3) as a tangible object.
  • the rotation direction O2 is not limited to the direction shown in FIG.
  • the cutting tool 1A may have a configuration that is reversed around the rotation axis O1 with respect to the configuration shown in FIG. 1, and in that case, the rotation direction O2 is the opposite direction.
  • the cutting tool 1A of the first embodiment is approximately disk-shaped with a rotation axis O1 extending from the tip 3A toward the rear end 3B.
  • the length of the main body portion 3 in the direction along the rotation axis O1 is, for example, 50 mm to 100 mm.
  • the outer diameter of the main body portion 3 in the direction perpendicular to the rotation axis O1 is, for example, 100 mm to 300 mm.
  • the cutting tool 1A has a main body portion 3 and an insert 4, as shown in a non-limiting example shown in FIG. 1 and the like.
  • the main body portion 3 is a base portion of the cutting tool 1A, and extends from the tip end 3A toward the rear end 3B along the rotation axis O1.
  • the main body part 3 has a plurality of pockets 5 located on the side of the tip 3A.
  • the pocket 5 may be open on the outer circumferential surface of the main body portion 3 and the end surface on the distal end 3A side.
  • the pocket 5 has a seat surface 6 to which the insert 4 is attached.
  • members labeled 4A, 4B, and 4C correspond to the insert 4.
  • the parts labeled 5A, 5B, and 5C correspond to the pockets 5.
  • the parts labeled 6A, 6B, and 6C correspond to the seat surface 6.
  • the insert 4 is located in the pocket 5 and attached to the main body part 3. Moreover, the insert 4 has a cutting edge 7 located on the side of the tip 3A. In one non-limiting example shown in FIG. 1 and the like, the insert 4 may be attached to the main body 3 by a fastener 8 such as a screw.
  • the insert 4 also has a lower surface 9 facing rearward in the rotational direction O2, and is in contact with the seat surface 6 of the pocket 5 at the lower surface 9.
  • the shapes of the seat surface 6 and the lower surface 9 are not particularly limited, but may be planar shapes.
  • parts marked with symbols 7A, 7B, and 7C correspond to the cutting blade 7.
  • FIG. 2 is a plan view of the cutting tool 1A shown in FIG. 1 viewed from the X1 direction, and a side view of the insert 4 (first insert 4A), and a side view of the insert 4 (second insert 4B).
  • FIG. FIG. 3 is a plan view of the cutting tool 1A shown in FIG. 1 viewed from the X2 direction, a side view of the insert 4 (second insert 4B), and a front view of the insert 4 (first insert 4A).
  • This is a diagram.
  • the object such as the insert 4 cannot be visually recognized when viewed from the front or from the side, the object may be evaluated from the front or from the side.
  • the main body portion 3 has a first pocket 5A and a second pocket 5B, as shown in a non-limiting example shown in FIGS. 1 to 3.
  • the first pocket 5A has a first seat surface 6A
  • the second pocket 5B has a second seat surface 6B.
  • the number of first pockets 5A and second pockets 5B is not limited to one each, and may be plural.
  • FIG. 4 is a plan view of the cutting tool 1A shown in FIG. 1 viewed from the X3 direction, and is a view of the cutting tool 1A viewed from the tip.
  • the main body portion 3 has two first pockets 5A and two second pockets 5B.
  • the main body 3 may have only a first pocket 5A and a second pocket 5B as the pockets 5, as in a non-limiting example shown in FIG. It may also have pockets 5 other than the second pocket 5B.
  • the cutting tool 1A has a first insert 4A and a second insert 4B.
  • the number of the first insert 4A and the second insert 4B is not limited to one each, and there may be a plurality of them.
  • the number of first inserts 4A corresponds to the number of first pockets 5A
  • the number of second inserts 4B corresponds to the number of second pockets 5B
  • the cutting tool 1A corresponds to the number of second pockets 5B.
  • the cutting tool 1A may have only the first insert 4A and the second insert 4B as the insert 4, as in a non-limiting example shown in FIG. 2 may have an insert 4 other than the insert 4B.
  • the first insert 4A has a first cutting edge 7A located on the side of the tip 3A.
  • the second insert 4B has a second cutting edge 7B located on the side of the tip 3A.
  • the first cutting edge 7A and the second cutting edge 7B each have a tip edge 10 and a main cutting edge 12.
  • the first insert 4A and the second insert 4B are inserts 4 for C chamfering, and the cutting edge 7 (the first cutting edge 7A and the second cutting edge 7B) has a tip edge 10 and a main cutting edge. It has 12.
  • parts labeled 10A, 10B, and 10C correspond to the tip blade 10.
  • the parts labeled 12A, 12B, and 12C correspond to the main cutting edge 12.
  • the tip blade 10 is a blade that is located on the side of the tip 3A of the insert 4 and extends in a direction generally perpendicular to the rotation axis O1.
  • the main cutting edge 12 is a blade that is mainly used during chamfering and extends obliquely with respect to the rotation axis O1.
  • the tip edge 10 and the main cutting edge 12 may each have a curved shape or a linear shape.
  • the main cutting edge 12 is connected to the tip edge 10 in a non-limiting example shown in FIG. 4 and the like.
  • the cutting edges 7 may be arranged in the order of the tip edge 10 and the main cutting edge 12 from the rotation axis O1 side toward the outer circumferential side.
  • the cutting edges 7 may be arranged in the order of the leading edge 10 and the main cutting edge 12 from the tip 3A side toward the rear end 3B side.
  • the inclination of the main cutting edge 12 with respect to the virtual straight line L1 perpendicular to the rotation axis O1 is ⁇
  • the inclination of the main cutting edge 12 in the first insert 4A is
  • ⁇ 1 is the inclination of the main cutting edge 12 in the second insert 4B (the cutting angle of the second insert 4B) is ⁇ 2
  • these cutting angles ⁇ 1 and ⁇ 2 are 45 °.
  • the cutting angles ⁇ 1 and ⁇ 2 are not limited to specific values, and may be from 10° to 60°.
  • the first cutting edge 7A has a first leading edge 10A and a first main cutting edge 12A
  • the second cutting edge 7B has a second leading edge 10B and a first leading edge 10B. It has two main cutting edges 12B.
  • the first main cutting edge 12A is in contact with the first tip edge 10A
  • the second main cutting edge 12B is It is in contact with the second tip blade 10B.
  • the axial rake AR refers to the angle formed by the rotation axis O1 and the cutting edge 7 when the insert 4 attached to the cutting tool 1A is viewed from the side.
  • it refers to the angle formed by the virtual straight line L2 passing through the main cutting edge 12 and the rotation axis O1.
  • the main cutting edge 12 is not a straight line, it passes through the end (tip 13) located on the tip 3A side of the main cutting edge 12 and the end (rear end 14) located on the rear end 3B side.
  • the straight line may be evaluated as the virtual straight line L2. Further, regarding FIGS.
  • a straight line O10 parallel to the rotation axis O1 is used instead of the rotation axis O1 to illustrate the axial rake AR, etc.
  • portions labeled 13A, 13B, and 13C correspond to the tip portion 13.
  • the size of the first axial rake AR1 may be between +5° and +20°. Further, the size of the second axial rake AR2 may be ⁇ 20° to ⁇ 5°.
  • Poisson burrs are likely to occur near both ends of the chamfered surface, particularly at the end on the side that was in contact with the cutting edge 7 until immediately before separating from the workpiece.
  • the first cutting edge 7A first main cutting edge 12A
  • the portion that is in contact with the chamfered surface immediately before completely separating from it is the portion of the first cutting edge 7A on the rear end 3B side. Therefore, burrs are generated near the upper end of the chamfered surface.
  • burrs tend to occur either near the top or bottom of the chamfered surface.
  • the cutting tool 1A in this embodiment has an insert 4 (first insert 4A) with a positive axial rake AR and an insert 4 (second insert 4B) with a negative axial rake AR. Even if a burr is generated near the upper end of the chamfered surface when cutting with the second insert 4B, the burr generated near the upper end of the chamfered surface will be removed by the second cutting edge 7B during subsequent cutting with the second insert 4B. easily removed by.
  • burrs can be similarly suppressed even when cutting is performed using the first insert 4A after cutting using the second insert 4B. That is, even if burrs are generated near the lower end of the chamfered surface during cutting with the second insert 4B, the burrs are likely to be removed by the first cutting blade 7A in the subsequent cutting of the first insert 4A. .
  • the cutting tool 1A does not require the cutting edge 7 of a special shape as in the prior art. Chamfering can be performed with less burr generation without being restricted by conditions.
  • the seating surfaces 6 (the first seating surface 6A and the first seating surface 6A and the By adjusting the angle of the second seating surface 6B), the axial rake AR etc. of the first cutting edge 7A and the second cutting edge 7B can be adjusted. Therefore, the first insert 4A and the second insert 4B can be reused in each cutting tool. Therefore, the cutting tool 1A is an insert-type cutting tool that suppresses the occurrence of burrs.
  • the absolute value of the axial rake AR of the first insert 4A may be larger than the absolute value of the axial rake AR of the second insert 4B. Specifically, the difference between the above two absolute values may be 3° to 15°.
  • the axial rake AR is positive, the machining accuracy improves in proportion to the size of the axial rake AR. Therefore, when the positive axial rake AR is relatively large, the machining accuracy improves. It is possible to perform high-quality chamfering.
  • the first seat surface 6A may be inclined with respect to the rotation axis O1
  • the second seat surface 6B may be inclined with respect to the rotation axis O1.
  • the first tilt angle ⁇ 1 is positive and the second tilt angle ⁇ 2 is negative.
  • the first insert 4A contacts the first seat surface 6A.
  • the second insert 4B contacts the second seat surface 6B.
  • the above-mentioned inclination angle ⁇ is defined as the angle between the rotation axis O1 and the seat surface 6 of the insert 4 when the insert 4 attached to the main body 3 is viewed from the side, as shown in the non-limiting example shown in FIGS. 5 and 6. It refers to the angle formed by the virtual straight line L3.
  • a straight line obtained by extending the portion of the lower surface 9 of the insert 4 that is in contact with the seat surface 6 when viewed from the side is used as the virtual straight line L3. May be evaluated.
  • the axial rake AR of each insert 4 depends on the inclination angle ⁇ of the seat surface 6 to which each insert 4 is attached. Therefore, even when the above-mentioned common insert 4 is used as the first insert 4A and the second insert 4B, the cutting tool 1A can be equipped with the insert 4 in which the axial rake AR is both positive and negative, and the necessary inserts can be repertoire can be reduced.
  • the common insert 4 does not necessarily mean that the contrasting inserts 4 have exactly the same shape; for example, when the insert 4 attached to the seat surface 6 is viewed from the side, the main cutting edge 12 When the angles formed by the virtual straight line L2 and the virtual straight line L3 of the seat surface 6 are the same, it may be evaluated as a common insert 4.
  • the absolute value of the first tilt angle ⁇ 1 may be larger than the absolute value of the second tilt angle ⁇ 2. Specifically, the difference between the above two absolute values may be 3° to 20°. Note that the magnitude of the first inclination angle ⁇ 1 may be from +5° to +30°. Further, the magnitude of the second inclination angle ⁇ 2 may be ⁇ 30° to ⁇ 5°.
  • the first radial rake RR1 may be smaller than the second radial rake RR2. good. In such a case, it is possible to suppress variations in cutting resistance due to the fact that the axial rake AR of the first insert 4A and the axial rake AR of the second insert 4B are different from each other.
  • the radial rake RR is defined by the cutting blade 7 and a virtual straight line L4 passing through the rotation axis O1 and the outer peripheral end of the cutting blade 7 when the insert 4 attached to the cutting tool 1A is viewed from the tip.
  • L4 passing through the rotation axis O1 and the outer peripheral end of the cutting blade 7 when the insert 4 attached to the cutting tool 1A is viewed from the tip.
  • the main cutting edge 12 is not a straight line
  • a straight line passing through the end (inner end 16) on the rotation axis O1 side of the main cutting edge 12 and the outer end 15 may be evaluated as the virtual straight line L5.
  • first radial rake RR1 may be between -30° and +15°
  • second radial rake RR2 may be between -15° and +30°
  • first radial rake RR1 may be the same as the second radial rake RR2.
  • the end of the main cutting edge 12 located on the side of the tip 3A is referred to as the tip 13.
  • the tip 13 of the first cutting blade 7A is the first tip 13A
  • the tip 13 of the second cutting blade 7B is the second tip 13B
  • in the non-limiting example shown in FIG. 13A is the tip 13 of the first main cutting edge 12A
  • the second tip 13B is the tip 13 of the second main cutting edge 12B. Note that when the tip edge 10 and the main cutting edge 12 are in contact with each other, as in a non-limiting example shown in FIG.
  • the first tip 13A may be at the same position as the second tip 13B.
  • the first tip 13A and the second tip 13B are located on a straight line orthogonal to the rotation axis O1. Good too. In such a case, since the heights of the cutting blades 7 are the same, steps are less likely to occur on the machined surface.
  • the same position may include a position within a range of -5% to +5% with respect to the size of the insert 4 in the direction along the rotation axis O1.
  • the first insert 4A may be adjacent to the second insert 4B.
  • the workpiece immediately after cutting with the insert 4 with a positive axial rake AR, the workpiece can be subsequently cut with the insert 4 with a negative axial rake AR, so that burrs are even less likely to occur.
  • adjacent refers to inserts that are closest to the first insert 4A in the front-rear direction in the rotational direction O2 when the cutting tool 1A is viewed from the tip, as in the non-limiting example shown in FIG. 4 are the second inserts 4B. Note that the above relationship holds true even when there is only one first insert 4A and one second insert 4B. For example, there is a case where the main body part 3 has two pockets 5 consisting of one first pocket 5A and one second pocket 5B.
  • a cutting tool 1B according to the second embodiment includes a main body portion 3 and an insert 4.
  • the description of the first embodiment will be used, and detailed explanation will be omitted.
  • the description of the first embodiment is also used regarding the definitions of angles and virtual straight lines.
  • the main body 3 further includes a third pocket 5C located on the side of the tip 3A, in addition to the first pocket 5A and the second pocket 5B.
  • the third pocket 5C has a third seat surface 6C.
  • the cutting tool 1B includes a third insert 4C attached to the third seat surface 6C.
  • FIG. 9 is a side view showing the cutting tool 1B according to the second embodiment, a side view of the third insert 4C, and a front view of the first insert 4A and the second insert 4B. It is.
  • the cutting tool 1B has one each of a first insert 4A and a second insert 4B, and two third inserts 4C.
  • the third insert 4C has a third cutting edge 7C
  • the third cutting edge 7C has a third tip edge 10C and a third main cutting edge 12C.
  • the inclination of the main cutting edge 12 in the third insert 4C is not limited to a specific value, and may be from 10° to 60°.
  • the third axial rake AR3 may be smaller than the first axial rake AR1, and It may be larger than the second axial rake AR2. In such a case, it becomes possible to remove the burrs left behind on the machined surface by the third cutting edge 7C.
  • the size of the third axial rake AR3 may be ⁇ 3° to +3°.
  • the third insert 4C is adjacent to the first insert 4A and the second insert 4B. Specifically, this refers to a case where the inserts 4 closest to the third insert 4C in the front-rear direction in the rotational direction O2 are the first insert 4A and the second insert 4B. However, at this time, a plurality of third inserts 4C may be located between the first insert 4A and the second insert 4B.
  • FIG. 11 is an enlarged view of region Y5 shown in FIG. 9 when viewed from the X4 direction, and is an enlarged view when the cutting tool 1B is viewed from the tip.
  • the third radial rake RR3 may be smaller than the first radial rake RR1, and It may be larger than the second radial rake RR2. In such a case, it is possible to suppress variations in cutting resistance caused by differences in the axial rake AR of the first insert 4A, the second insert 4B, and the third insert 4C.
  • the size of the third radial rake RR3 may be ⁇ 10° to +10°.
  • the third tip 13C is the tip 13 of the third main cutting edge 12C.
  • the third tip portion 13C may be located at the same position as the first tip portion 13A and the second tip portion 13B.
  • the first tip 13A, the second tip 13B, and the third tip are arranged on a straight line orthogonal to the rotation axis O1. 13C of parts may be located. In such a case, since the heights of the cutting blades 7 are the same, steps are less likely to occur on the machined surface.
  • each of the first inserts 4A may be arranged rotationally symmetrically about the rotation axis O1 with respect to the cutting tool 1A and the cutting tool 1B.
  • the first inserts 4A have 180° rotational symmetry. It is arranged so that That is, if there are N first pockets 5A, the first pockets 5A may be arranged so as to be (360°/N) rotationally symmetrical. This also applies to the second insert 4B and the third insert 4C.
  • the cutting load is likely to be applied uniformly around the rotation axis O1, so variations in the cutting load applied to each insert can be suppressed. Therefore, for example, variations in wear among the inserts can be suppressed.
  • each of the first inserts 4A is arranged at equal intervals around the rotation axis O1 with respect to each of the second inserts 4B. may be placed.
  • the first insert 4A is at a 90° angle with each of the two second inserts 4B about the rotation axis O1. arranged at intervals. This also applies to the case where the first insert 4A or the second insert 4B is replaced with the third insert 4C.
  • first inserts 4A, second inserts 4B, and third inserts 4C there is no particular limitation regarding the number of first inserts 4A, second inserts 4B, and third inserts 4C, and for example, the number of first inserts 4A is greater than the number of second inserts 4B. It may be more or less.
  • Examples of the material of the insert 4 include cemented carbide and cermet.
  • Examples of the composition of the cemented carbide include WC-Co, WC-TiC-Co, and WC-TiC-TaC-Co.
  • WC-Co is produced by adding cobalt (Co) powder to tungsten carbide (WC) and sintering it.
  • WC-TiC-Co is WC-Co with titanium carbide (TiC) added.
  • WC-TiC-TaC-Co is WC-TiC-Co with tantalum carbide (TaC) added.
  • cermet is a sintered composite material in which a metal is combined with a ceramic component.
  • examples of cermets include those whose main component is a titanium compound such as titanium carbide (TiC) and titanium nitride (TiN).
  • the surface of the insert 4 may be coated with a coating using chemical vapor deposition (CVD) or physical vapor deposition (PVD) methods.
  • CVD chemical vapor deposition
  • PVD physical vapor deposition
  • the composition of the film include titanium carbide (TiC), titanium nitride (TiN), titanium carbonitride (TiCN), and alumina (Al 2 O 3 ).
  • steel cast iron, aluminum alloy, etc. can be used.
  • FIGS. 12 to 14 illustrate a process of cutting a workpiece 102 as a non-limiting example of the method for manufacturing the cut workpiece 101.
  • a method for manufacturing a cut workpiece 101 according to a non-limiting embodiment of the present disclosure may include the following steps (1) to (3).
  • the cutting tool 1A may be rotated in the rotation direction O2 around the rotation axis O1, and the cutting tool 1A may be brought closer to the workpiece 102 in the feed direction S1 (see FIG. 12).
  • This step can be performed, for example, by fixing the workpiece 102 on the table of a machine tool to which the cutting tool 1A is attached, and bringing the cutting tool 1A close to it in a rotating state.
  • the workpiece 102 and the cutting tool 1A may be brought relatively close to each other, and the workpiece 102 may be brought close to the cutting tool 1A.
  • the rotating cutting tool 1A may be brought into contact with a desired position on the surface of the workpiece 102 to cut the workpiece 102. (See Figure 13).
  • the cutting blade 7 may be brought into contact with a desired position on the surface of the workpiece 102.
  • the cutting tool 1A may be separated from the workpiece 102 by moving it in the S1 direction (see FIG. 14).
  • the cutting tool 1A may be relatively separated from the workpiece 102, for example, the workpiece 102 may be separated from the cutting tool 1A, similarly to the above-mentioned step (1).
  • the cutting tool 1A is rotated. The process of bringing the cutting tool 1A into contact with different locations on the workpiece 102 may be repeated while maintaining this state.
  • Examples of the material of the work material 102 include carbon steel, alloy steel, stainless steel, cast iron, and non-ferrous metals.
  • the cutting tool includes a main body extending from the tip toward the rear end along the rotation axis, and having a first pocket and a second pocket respectively located on the side of the tip; a first insert located in the first pocket and having a first cutting edge; and a second insert located in the second pocket and having a second cutting edge, and the axial rake of the first insert is The axial rake of the second insert may be negative.
  • the absolute value of the axial rake size of the first insert may be larger than the absolute value of the axial rake size of the second insert.
  • the first pocket has a first seating surface that is inclined at a positive angle with respect to the rotation axis
  • the second pocket has a first seat surface that is inclined at a positive angle with respect to the rotation axis.
  • the first insert may contact the first seating surface
  • the second insert may contact the second seating surface
  • the second insert may contact the second seating surface.
  • the radial rake of the first insert may be smaller than the radial rake of the second insert.
  • the first cutting edge has a first tip portion located at an end on the tip side
  • the second cutting edge has a It may have a second tip located at an end on the side of the tip, and the first tip may be at the same position as the second tip in the direction along the rotation axis.
  • the first insert may be adjacent to the second insert in the rotational direction of the rotating shaft.
  • the main body further has a third pocket located on the side of the tip, and a third pocket located in the third pocket and a third cut.
  • the third insert further includes a third insert having a blade, and the third insert is adjacent to the first insert and the second insert in the rotational direction of the rotating shaft, and the axial rake of the third insert is adjacent to the first insert. It may be smaller than the axial rake of the insert and larger than the axial rake of the second insert.
  • [8] A step of rotating the cutting tool according to any one of [1] to [7] above, a step of bringing the cutting tool into contact with the workpiece, and a step of separating the cutting tool from the workpiece. You may prepare.

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PCT/JP2023/017559 2022-05-25 2023-05-10 切削工具及び切削加工物の製造方法 WO2023228741A1 (ja)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60114411A (ja) * 1983-11-24 1985-06-20 Ishii Seimitsu Kogyo Kk 正面フライス
US20030226694A1 (en) * 2002-06-06 2003-12-11 Steven Moseley Core drill bit with geometrically defined cutting elements
JP2014524362A (ja) * 2011-08-22 2014-09-22 イスカーリミテッド Ｖ字形状のコーナー視を有する切削インサートとフライス工具

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60114411A (ja) * 1983-11-24 1985-06-20 Ishii Seimitsu Kogyo Kk 正面フライス
US20030226694A1 (en) * 2002-06-06 2003-12-11 Steven Moseley Core drill bit with geometrically defined cutting elements
JP2014524362A (ja) * 2011-08-22 2014-09-22 イスカーリミテッド Ｖ字形状のコーナー視を有する切削インサートとフライス工具

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