WO2024101308A1 - 切削インサートおよび加工方法 - Google Patents

切削インサートおよび加工方法 Download PDF

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Publication number
WO2024101308A1
WO2024101308A1 PCT/JP2023/039890 JP2023039890W WO2024101308A1 WO 2024101308 A1 WO2024101308 A1 WO 2024101308A1 JP 2023039890 W JP2023039890 W JP 2023039890W WO 2024101308 A1 WO2024101308 A1 WO 2024101308A1
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WO
WIPO (PCT)
Prior art keywords
cutting edge
edge portion
cutting
region
angle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/039890
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
浩也 諸口
綾 吉村
裕介 松田
暁 久木野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Hardmetal Corp
Original Assignee
Sumitomo Electric Hardmetal Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Hardmetal Corp filed Critical Sumitomo Electric Hardmetal Corp
Priority to EP23888656.8A priority Critical patent/EP4616980A4/en
Priority to JP2024543224A priority patent/JP7612948B2/ja
Priority to CN202380076392.7A priority patent/CN120187549A/zh
Priority to KR1020257014219A priority patent/KR20250100648A/ko
Publication of WO2024101308A1 publication Critical patent/WO2024101308A1/ja
Priority to JP2024227176A priority patent/JP2025038218A/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
    • B23B27/141—Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness
    • B23B27/145—Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness characterised by having a special shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B1/00—Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/04—Overall shape
    • B23B2200/0447—Parallelogram
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/20—Top or side views of the cutting edge
    • B23B2200/201—Details of the nose radius and immediately surrounding area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/20—Top or side views of the cutting edge
    • B23B2200/208—Top or side views of the cutting edge with wiper, i.e. an auxiliary cutting edge to improve surface finish
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/24—Cross section of the cutting edge
    • B23B2200/242—Cross section of the cutting edge bevelled or chamfered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/28—Angles
    • B23B2200/286—Positive cutting angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
    • B23B2222/16—Cermet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/12—Boron nitride
    • B23B2226/125—Boron nitride cubic [CBN]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/18—Ceramic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/31—Diamond

Definitions

  • Patent Document 1 discloses a cutting insert having a rake face, a clearance face, and a chamfer disposed between the rake face and the clearance face.
  • a cutting insert includes a rake face, a clearance face, and a cutting edge formed by the ridge between the rake face and the clearance face.
  • the surface involved in cutting is composed of at least one of a cBN-based sintered body, a diamond-based sintered body, ceramics, cermet, or cemented carbide.
  • the cutting edge has a first cutting edge portion for corner processing, a second cutting edge portion for drawing, a third cutting edge portion for finishing surface processing, a first connecting cutting edge portion connecting the first cutting edge portion and the third cutting edge portion, and a second connecting cutting edge portion connecting the second cutting edge portion and the third cutting edge portion.
  • the third cutting edge portion is disposed between the first cutting edge portion and the second cutting edge portion.
  • the first cutting edge portion has a curved shape.
  • the radius of curvature of the first cutting edge portion is 0.1 mm or more and 2.4 mm or less.
  • the second cutting edge portion has a straight shape or a curved shape with a radius of curvature of 3 mm or more.
  • the third cutting edge portion has a straight line shape or a curved shape with a radius of curvature of 3 mm or more.
  • the first connecting cutting edge portion and the second connecting cutting edge portion each have a curved shape.
  • FIG. 1 is a schematic perspective view showing the configuration of a cutting insert according to the present embodiment.
  • FIG. 2 is a schematic plan view showing the configuration of the cutting tool according to this embodiment.
  • FIG. 3 is an enlarged schematic view of region III in FIG.
  • FIG. 4 is a schematic cross-sectional view taken along line IV-IV in FIG.
  • FIG. 5 is a schematic diagram showing a cross section perpendicular to a tangent line of the first cutting edge portion.
  • FIG. 6 is a schematic diagram showing a cross section perpendicular to a tangent line of the second cutting edge portion.
  • FIG. 7 is a schematic diagram showing a cross section perpendicular to a tangent line of the third cutting edge portion.
  • FIG. 8 is a schematic perspective view showing the first relief region.
  • FIG. 8 is a schematic perspective view showing the first relief region.
  • FIG. 9 is a schematic perspective view showing the second relief region.
  • FIG. 10 is a schematic diagram showing the first processing method according to the present embodiment.
  • FIG. 11 is an enlarged schematic view showing the processed state.
  • FIG. 12 is a schematic side view showing the side rake angle of the second cutting edge portion.
  • FIG. 13 is a schematic diagram showing a second processing method according to the present embodiment.
  • An object of the present disclosure is to provide a cutting insert capable of improving tool life. [Effects of this disclosure] According to the present disclosure, a cutting insert capable of improving tool life can be provided. [Description of the embodiments of the present disclosure] First, the embodiments of the present disclosure will be listed and described.
  • a cutting insert 100 includes a cutting edge 10 formed by a rake face 50, a clearance face 30, and a ridge line 20 between the rake face 50 and the clearance face 30.
  • the surface involved in cutting is formed of at least one of a cBN-based sintered body, a diamond-based sintered body, a ceramic, a cermet, or a cemented carbide.
  • the cutting edge 10 has a first cutting edge portion 1 for corner processing, a second cutting edge portion 2 for drawing, a third cutting edge portion 3 for finishing surface processing, a first connecting cutting edge portion 11 connecting the first cutting edge portion 1 and the third cutting edge portion 3, and a second connecting cutting edge portion 12 connecting the second cutting edge portion 2 and the third cutting edge portion 3.
  • the third cutting edge portion 3 is disposed between the first cutting edge portion 1 and the second cutting edge portion 2.
  • the first cutting edge portion 1 has a curved shape.
  • the radius of curvature of the first cutting edge portion 1 is 0.1 mm or more and 2.4 mm or less.
  • the second cutting edge portion 2 has a straight line shape or a curved shape with a radius of curvature of 3 mm or more.
  • the third cutting edge portion 3 has a straight line shape or a curved shape with a radius of curvature of 3 mm or more.
  • Each of the first connecting cutting edge portion 11 and the second connecting cutting edge portion 12 has a curved shape.
  • the radius of curvature of each of the first connecting cutting edge portion 11 and the second connecting cutting edge portion 12 may be 0.2 mm or more.
  • the clearance angle of each of the first cutting edge portion 1, the second cutting edge portion 2, and the third cutting edge portion 3 may be greater than or equal to 3° and less than or equal to 20°.
  • the cutting edge 10 may have a fourth cutting edge portion 4 connected to the first cutting edge portion 1.
  • the first cutting edge portion 1 may be located between the third cutting edge portion 3 and the fourth cutting edge portion 4.
  • the clearance surface 30 may have a first clearance region 71 and a second clearance region 72.
  • the first clearance region 71 may be connected to the fourth cutting edge portion 4.
  • the second clearance region 72 may be connected to the first cutting edge portion 1, the second cutting edge portion 2, the third cutting edge portion 3, the first connecting cutting edge portion 11, and the second connecting cutting edge portion 12.
  • the clearance angle of the first clearance region 71 may be 0°.
  • the clearance angle of the second clearance region 72 may be 3° or more and 20° or less.
  • the cutting edge 10 may have a fourth cutting edge portion 4 connected to the first cutting edge portion 1.
  • the first cutting edge portion 1 may be located between the third cutting edge portion 3 and the fourth cutting edge portion 4.
  • the ridge 20 may have a first ridge region 81 and a second ridge region 82.
  • the first ridge region 81 may include the fourth cutting edge portion 4.
  • the second ridge region 82 may include the first cutting edge portion 1, the second cutting edge portion 2, the third cutting edge portion 3, the first connecting cutting edge portion 11, and the second connecting cutting edge portion 12.
  • the clearance angle of the first ridge region 81 may be 0°.
  • the clearance angle of the second ridge region 82 may be 3° or more and 20° or less.
  • the value obtained by dividing the first length by the sum of the first length and the second length may be greater than 0.05 and less than or equal to 0.95.
  • the cutting edge 10 may have a fourth cutting edge portion 4 connected to the first cutting edge portion 1.
  • the first cutting edge portion 1 may be located between the third cutting edge portion 3 and the fourth cutting edge portion 4.
  • the first cutting edge portion 1 may be composed of the first region 1a and the second region 1b connected to the first region 1a.
  • the cutting edge 10 may be composed of a first cutting portion 91 and a second cutting portion 92.
  • the first cutting portion 91 may be composed of the first region 1a, the second cutting edge portion 2, the third cutting edge portion 3, the first connecting cutting edge portion 11, and the second connecting cutting edge portion 12.
  • the second cutting portion 92 may be composed of the second region 1b and the fourth cutting edge portion 4 connected to the second region 1b.
  • a machining method is a machining method using the cutting insert 100 described in any one of (1) to (6) above.
  • the side rake angle of the second cutting edge portion 2 may be greater than or equal to -20° and less than or equal to 10°.
  • a processing method is a processing method using the cutting insert 100 described in any one of (1) to (6) above.
  • the side cutting edge angle of the first cutting edge portion 1 may be 30° or more and less than 70°.
  • the side cutting edge angle of the second cutting edge portion 2 may be 70° or more and less than 89°.
  • FIG. 1 is a schematic perspective view showing the configuration of a cutting insert 100 according to this embodiment.
  • the cutting insert 100 according to this embodiment has a blade member 6 and a base metal 7.
  • the blade member 6 is attached to the base metal 7.
  • the blade member 6 is involved in cutting.
  • the shape of the base metal 7 in plan view is not particularly limited, but may be, for example, a diamond shape.
  • the blade member 6 is joined to an acute corner portion of the base metal 7.
  • the base metal 7 is made of, for example, cemented carbide or cermet.
  • the cutting insert 100 according to this embodiment is formed by joining the blade member 6 to an acute corner portion of the base metal 7, but the entire cutting insert 100 may be formed of the blade member 6.
  • a countersunk portion 8 is formed at the acute corner of the base metal 7 by partially recessing part of the upper surface.
  • the blade member 6 is joined to the base metal 7 at the countersunk portion 8 by a joining means such as brazing.
  • the blade member 6 is composed of a cBN-based sintered body, a diamond-based sintered body, ceramics, a cermet, or a cemented carbide.
  • the cBN-based sintered body is a sintered body containing cBN (cubic boron nitride) at a volume ratio of 10% to 99.9%.
  • the diamond-based sintered body is a sintered body containing diamond at a volume ratio of 10% to 99.9%.
  • the ceramic is not particularly limited, but for example, ceramics such as alumina (Al 2 O 3 ), silicon nitride (Si 3 N 4 ), and titanium carbide (TiC) can be preferably used.
  • the cermet is not particularly limited, but for example, nitride-based cermet and carbide-based cermet can be preferably used.
  • the cutting insert 100 has a rake face 50, a clearance face 30, a cutting edge 10, and a bottom surface 60.
  • the cutting edge 10 is formed by a ridge line 20 between the rake face 50 and the clearance face 30.
  • the ridge line 20 has the cutting edge 10, a first ridge portion 21, and a second ridge portion 22.
  • the cutting edge 10 is a part of the ridge line 20.
  • the cutting edge 10 has a first cutting edge portion 1 for corner machining, a second cutting edge portion 2 for drawing, a third cutting edge portion 3 for finishing surface machining, a first connecting cutting edge portion 11, a second connecting cutting edge portion 12, and a fourth cutting edge portion 4.
  • the first connecting cutting edge portion 11 connects the first cutting edge portion 1 and the third cutting edge portion 3.
  • the first connecting cutting edge portion 11 is located between the first cutting edge portion 1 and the third cutting edge portion 3.
  • the second connecting cutting edge portion 12 connects the second cutting edge portion 2 and the third cutting edge portion 3.
  • the second connecting cutting edge portion 12 is located between the second cutting edge portion 2 and the third cutting edge portion 3.
  • the third cutting edge portion 3 is disposed between the first cutting edge portion 1 and the second cutting edge portion 2.
  • the third cutting edge portion 3 connects the first connecting cutting edge portion 11 and the second connecting cutting edge portion 12.
  • the fourth cutting edge portion 4 is connected to the first cutting edge portion 1.
  • the first cutting edge portion 1 is located between the third cutting edge portion 3 and the fourth cutting edge portion 4.
  • FIG. 2 is a schematic plan view showing the configuration of a cutting tool according to this embodiment.
  • the schematic plan view shown in FIG. 2 shows a state seen along a straight line perpendicular to the rake face 50.
  • the viewpoint is at a position opposite the rake face 50.
  • the line of sight D is the direction from the rake face 50 toward the bottom surface 60.
  • the first cutting edge portion 1 has a curved shape.
  • the first cutting edge portion 1 is curved so as to be convex outward.
  • the first cutting edge portion 1 is a corner cutting edge portion.
  • the radius of curvature of the first cutting edge portion 1 is 0.1 mm or more and 2.4 mm or less.
  • the radius of curvature of the first cutting edge portion 1 is not particularly limited, but may be 0.2 mm or more and 2.2 mm or less, 0.4 mm or more and 2.0 mm or less, or 0.6 mm or more and 1.8 mm or less.
  • the second cutting edge portion 2 when viewed along a straight line perpendicular to the rake face 50, the second cutting edge portion 2 has a straight shape or a curved shape with a radius of curvature of 3 mm or more.
  • the radius of curvature of the second cutting edge portion 2 may be 5 mm or more, 10 mm or more, 30 mm or more, or 50 mm or more.
  • the radius of curvature of the second cutting edge portion 2 may be 150 mm or less, 130 mm or less, or 100 mm or less.
  • the third cutting edge portion 3 when viewed along a straight line perpendicular to the rake face 50, the third cutting edge portion 3 has a straight shape or a curved shape with a radius of curvature of 3 mm or more.
  • the radius of curvature of the third cutting edge portion 3 may be 5 mm or more, 10 mm or more, 20 mm or more, or 40 mm or more.
  • the radius of curvature of the third cutting edge portion 3 may be 80 mm or less, 70 mm or less, or 60 mm or less.
  • the length of the second cutting edge portion 2 may be greater than the length of the third cutting edge portion 3.
  • the length of the second cutting edge portion 2 may be 1.5 times or more, or may be 2 times or more, the length of the third cutting edge portion 3.
  • the length of the second cutting edge portion 2 may be 10 times or less, or may be 5 times or less, the length of the third cutting edge portion 3.
  • the length of the cutting edge portion refers to the length when the curve is made into a straight line.
  • Each of the first connecting cutting edge portion 11 and the second connecting cutting edge portion 12 is curved, for example, convex outward.
  • the radius of curvature of each of the first connecting cutting edge portion 11 and the second connecting cutting edge portion 12 is, for example, 0.2 mm or more.
  • the radius of curvature of each of the first connecting cutting edge portion 11 and the second connecting cutting edge portion 12 may be 0.3 mm or more, or 0.5 mm or more.
  • the radius of curvature of each of the first connecting cutting edge portion 11 and the second connecting cutting edge portion 12 may be less than 3 mm, or may be less than 2 mm.
  • the radius of curvature of the first connecting cutting edge portion 11 and each of the adjacent first cutting edge portion 1 and third cutting edge portion 3 are different. It is preferable that the radius of curvature of the second connecting cutting edge portion 12 and each of the adjacent second cutting edge portion 2 and third cutting edge portion 3 are different.
  • the first connecting cutting edge portion 11 and the second connecting cutting edge portion 12 are not structurally or functionally involved in cutting.
  • each of the first ridge portion 21 and the second ridge portion 22 has a straight line shape.
  • the first ridge portion 21 is connected to the fourth cutting edge portion 4.
  • the second ridge portion 22 is connected to the second cutting edge portion 2.
  • the length of the first ridge portion 21 may be greater than the length of the second ridge portion 22.
  • the length of the first ridge portion 21 may be greater than the length of the fourth cutting edge portion 4.
  • the length of the second ridge portion 22 may be greater than the length of the second cutting edge portion 2.
  • Each of the first ridge portion 21 and the second ridge portion 22 is formed by a base metal 7.
  • the cutting edge 10 is formed by a blade member 6.
  • the scooping surface 50 has a first scooping surface portion 51 and a second scooping surface portion 52.
  • the first scooping surface portion 51 is formed of a blade member 6.
  • the second scooping surface portion 52 is formed of a base metal 7.
  • a through hole 5 is formed in the second scooping surface portion 52.
  • the cutting edges 10 may be formed at two locations on the diagonal line of the rhombus.
  • the shape of the cutting edges 10 may be two-fold symmetric with respect to an axis passing through the through hole 5.
  • the angle formed by the straight line along the first ridge portion 21 and the straight line along the second ridge portion 22 (apex angle ⁇ 8 of the first cutting edge portion 1) is, for example, 30° or more and 90° or less.
  • the apex angle ⁇ 8 of the first cutting edge portion 1 may be, for example, 35°, 55°, 60°, 70°, or 80°.
  • FIG. 3 is an enlarged schematic diagram of region III in FIG. 1.
  • the flank 30 has a first flank portion 31, a second flank portion 32, a third flank portion 33, a fourth flank portion 34, a fifth flank portion 35, a sixth flank portion 36, a seventh flank portion 37, and a side portion 40.
  • the first flank portion 31 is continuous with the first cutting edge portion 1.
  • the second flank portion 32 is continuous with the second cutting edge portion 2.
  • the third flank portion 33 is continuous with the third cutting edge portion 3.
  • the fourth flank portion 34 is connected to the fourth cutting edge portion 4.
  • the fifth flank portion 35 is connected to the first connecting cutting edge portion 11.
  • the sixth flank portion 36 is connected to the second connecting cutting edge portion 12.
  • the seventh flank portion 37 is connected to each of the first flank portion 31 and the fourth flank portion 34.
  • the first flank portion 31, the second flank portion 32, the third flank portion 33, the fourth flank portion 34, the fifth flank portion 35, the sixth flank portion 36, and the seventh flank portion 37 are formed by the blade member 6.
  • the side surface portion 40 has a first side surface region 41, a second side surface region 42, a third side surface region 43, a fourth side surface region 44, a fifth side surface region 45, a sixth side surface region 46, and a seventh side surface region 47.
  • the first side surface region 41 is connected to each of the first clearance surface portion 31 and the bottom surface 60.
  • the second side surface region 42 is connected to each of the second clearance surface portion 32, the second ridge portion 22, and the bottom surface 60.
  • the third side surface region 43 is connected to each of the third clearance surface portion 33 and the bottom surface 60.
  • the fourth side region 44 is connected to the seventh flank portion 37.
  • the fifth side region 45 is connected to each of the fifth flank portion 35 and the bottom surface 60.
  • the sixth side region 46 is connected to each of the sixth flank portion 36 and the bottom surface 60.
  • the seventh side region 47 is connected to each of the fourth flank portion 34, the first ridge portion 21 and the bottom surface 60.
  • the side portion 40 is formed of the base metal 7.
  • the cutting edge 10 is made up of a first cut portion 91 and a second cut portion 92.
  • the first cut portion 91 is made up of a first region 1a of the first cutting edge portion 1, a second cutting edge portion 2, a third cutting edge portion 3, a first connecting cutting edge portion 11, and a second connecting cutting edge portion 12.
  • the second cut portion 92 is made up of a second region 1b of the first cutting edge portion 1 and a fourth cutting edge portion 4.
  • the first cutting edge portion 1 is made up of a first region 1a and a second region 1b.
  • the first region 1a is connected to the second region 1b.
  • the first ridge portion 21 and the second ridge portion 22 do not constitute the cutting edge 10.
  • FIG. 4 is a schematic cross-sectional view taken along line IV-IV in FIG. 2. As shown in FIG. 4, the through hole 5 penetrates the base metal 7. The through hole 5 opens to each of the scooping face 50 and the bottom face 60.
  • the seventh side region 47 is inclined perpendicularly to the scooping face 50.
  • the fourth side region 44 is inclined relative to the seventh side region 47.
  • the inclination angle (fourth angle ⁇ 4) of the fourth side region 44 relative to the seventh side region 47 is, for example, 3° or more and 20° or less.
  • FIG. 5 is a schematic diagram showing a cross section perpendicular to the tangent of the first cutting edge portion 1.
  • the first clearance surface portion 31 is inclined inward with respect to a plane perpendicular to the rake face 50.
  • the clearance angle (first angle ⁇ 1) of the first cutting edge portion 1 is the inclination angle of the first clearance surface portion 31 with respect to the plane perpendicular to the rake face 50.
  • the first angle ⁇ 1 may be, for example, 3° or more and 20° or less, 5° or more and 18° or less, or 7° or more and 15° or less.
  • Figure 6 is a schematic diagram showing a cross section perpendicular to the tangent of the second cutting edge portion 2.
  • the second clearance surface portion 32 is inclined inward with respect to a plane perpendicular to the rake face 50.
  • the clearance angle (second angle ⁇ 2) of the second cutting edge portion 2 is the inclination angle of the second clearance surface portion 32 with respect to the plane perpendicular to the rake face 50.
  • the second angle ⁇ 2 may be, for example, 3° or more and 20° or less, 5° or more and 18° or less, or 7° or more and 15° or less.
  • Figure 7 is a schematic diagram showing a cross section perpendicular to the tangent of the third cutting edge portion 3.
  • the third clearance portion 33 is inclined inward with respect to a plane perpendicular to the rake face 50.
  • the clearance angle (third angle ⁇ 3) of the third cutting edge portion 3 is the inclination angle of the third clearance portion 33 with respect to the plane perpendicular to the rake face 50.
  • the third angle ⁇ 3 may be, for example, 3° or more and 20° or less, 5° or more and 18° or less, or 7° or more and 15° or less.
  • FIG. 8 is a schematic perspective view showing the first clearance region 71.
  • the clearance face 30 has a first clearance region 71 and a second clearance region 72.
  • the first clearance region 71 is composed of the fourth clearance face portion 34 and the seventh side region 47.
  • the hatched region in FIG. 8 corresponds to the first clearance region 71.
  • the clearance angle of the first clearance region 71 is 0°. In other words, the first clearance region 71 is perpendicular to the rake face 50.
  • the clearance angle of the first clearance region 71 is the inclination angle of the first clearance region 71 with respect to a plane perpendicular to the rake face 50.
  • the ridge 20 has a first ridge region 81 and a second ridge region 82.
  • the first ridge region 81 is composed of the fourth cutting edge portion 4 and the first ridge portion 21.
  • the length of the first ridge region 81 is the length from one corner of the cutting insert 100 to the end of the fourth cutting edge portion 4.
  • the first ridge region 81 is continuous with the first relief region 71.
  • the relief angle of the first ridge region 81 is 0°.
  • the relief angle of the first ridge region 81 is the inclination angle of the first relief region 71 in a cross section perpendicular to the tangent of the first ridge region 81.
  • the second clearance region 72 is composed of the area of the clearance surface 30 other than the first clearance region 71.
  • the second clearance region 72 is composed of the first clearance surface portion 31, the second clearance surface portion 32, the third clearance surface portion 33, the fifth clearance surface portion 35, the sixth clearance surface portion 36, the seventh clearance surface portion 37, the first side surface region 41, the second side surface region 42, the third side surface region 43, the fourth side surface region 44, the fifth side surface region 45, and the sixth side surface region 46.
  • the hatched area in FIG. 9 corresponds to the second clearance region 72.
  • the clearance angle of the second clearance region 72 is 3° or more and 20° or less.
  • the clearance angle of the second clearance region 72 is the inclination angle of the second clearance region 72 with respect to a plane perpendicular to the rake face 50.
  • the clearance angle of the second clearance region 72 corresponds to the fourth angle ⁇ 4 (see FIG. 4).
  • the second ridge region 82 is composed of the first cutting edge portion 1, the second cutting edge portion 2, the third cutting edge portion 3, the first connecting cutting edge portion 11, the second connecting cutting edge portion 12, and the second ridge portion 22.
  • the length of the second ridge region 82 is the length from another corner portion of the cutting insert 100 to the end of the first cutting edge portion 1.
  • the second ridge region 82 is continuous with the second relief region 72.
  • the relief angle of the second ridge region 82 is 3° or more and 20° or less.
  • the relief angle of the second ridge region 82 is the inclination angle of the second relief region 72 in a cross section perpendicular to the tangent of the second ridge region 82.
  • the value obtained by dividing the first area by the sum of the first area and the second area is, for example, 0.05 or more and 0.95 or less.
  • the value obtained by dividing the first area by the sum of the first area and the second area may be 0.1 or more and 0.9 or less, or 0.2 or more and 0.8 or less.
  • the value obtained by dividing the first length by the sum of the first length and the second length is, for example, greater than 0.05 and less than 0.95.
  • the value obtained by dividing the first length by the sum of the first length and the second length may be greater than 0.1 and less than 0.9, or greater than 0.2 and less than 0.8.
  • a processing method according to this embodiment will be described.
  • a workpiece is processed using the cutting insert 100 according to this embodiment.
  • FIG. 10 is a schematic diagram showing a first processing method according to this embodiment.
  • the cutting insert 100 is attached to the holder 150 using a pressing member 160.
  • the pressing member 160 has a main body portion 162 and an insertion portion 161.
  • the insertion portion 161 is inserted into the through hole 5 of the cutting insert 100.
  • the main body portion 162 has an attachment hole 163.
  • a fastening screw 170 is inserted into the attachment hole 163. In this way, the pressing member 160 is fixed to the holder 150.
  • the pressing member 160 pulls the cutting insert 100 toward the holder 150, thereby fixing the cutting insert 100 to the holder 150.
  • the cutting insert 100 is capable of outer diameter machining.
  • the workpiece 200 has an outer peripheral surface 201.
  • the pressing process is performed while moving the cutting insert 100 in a first feed direction A1.
  • the first feed direction A1 is the direction from the holder 150 toward the cutting insert 100.
  • the pulling process is performed while moving the cutting insert 100 in a second feed direction A2.
  • the second feed direction A2 is the direction from the cutting insert 100 toward the holder 150.
  • the workpiece 200 is machined using the second cutting edge portion 2.
  • Each of the first feed direction A1 and the second feed direction A2 is parallel to the rotation axis X of the workpiece 200.
  • the workpiece 200 rotates in a rotation direction R around the rotation axis X.
  • FIG. 11 is an enlarged schematic diagram showing the machining state.
  • the enlarged schematic diagram shown in FIG. 11 shows the state seen along a straight line perpendicular to the rake face 50.
  • the cutting edge 10 cuts into the workpiece 200 with a cutting depth H.
  • the lateral cutting edge angle of the first cutting edge portion 1 is the fifth angle ⁇ 5.
  • the fifth angle ⁇ 5 is the angle between the tangent of the first cutting edge portion 1 at the contact point between the outer peripheral surface 201 of the workpiece 200 and the first cutting edge portion 1, and a straight line perpendicular to the rotation axis X of the workpiece 200.
  • the fifth angle ⁇ 5 is, for example, 30° or more and less than 70°.
  • the fifth angle ⁇ 5 may be 35° or more and less than 65°, or may be 40° or more and less than 60°.
  • the lateral cutting edge angle of the second cutting edge portion 2 in the drawing process is a sixth angle ⁇ 6.
  • the sixth angle ⁇ 6 is the angle between a tangent to the second cutting edge portion 2 at the contact point between the outer peripheral surface 201 of the workpiece 200 and the second cutting edge portion 2, and a straight line perpendicular to the rotation axis X of the workpiece 200.
  • the sixth angle ⁇ 6 is, for example, 70° or more and less than 89°.
  • the sixth angle ⁇ 6 may be 73° or more and less than 86°, or 76° or more and less than 83°.
  • the sixth angle ⁇ 6 may be greater than the fifth angle ⁇ 5.
  • FIG. 12 is a schematic side view showing the side rake angle of the second cutting edge portion 2.
  • the schematic side view shown in FIG. 12 shows the state as seen along a straight line perpendicular to the rotation axis X of the workpiece 200.
  • the cutting insert 100 is fed in the second feed direction A2 along a direction parallel to the rotation axis X of the workpiece 200.
  • the side rake angle ⁇ 7 of the second cutting edge portion 2 is the inclination angle of the second cutting edge portion 2 with respect to a straight line C parallel to the rotation axis X of the workpiece 200.
  • the side rake angle of the second cutting edge portion 2 is the seventh angle ⁇ 7.
  • the seventh angle ⁇ 7 may be, for example, -20° or more and 10° or less.
  • the seventh angle ⁇ 7 may be -15° or more and 8° or less, or -10° or more and 5° or less. Note that, when the cutting edge 10 advances beyond the rake face 50 during cutting, the side rake angle is a positive angle. Conversely, when the cutting edge 10 lags behind the rake face 50 during cutting, the side rake angle is a negative angle.
  • FIG. 13 is a schematic diagram showing the second machining method according to this embodiment.
  • end face machining and outer diameter machining may be performed.
  • the workpiece 200 has an outer peripheral surface 201 and an end surface 202.
  • the outer peripheral surface 201 is parallel to the rotation axis X of the workpiece 200.
  • the end surface 202 is perpendicular to the rotation axis X of the workpiece 200.
  • the pushing and corner machining are performed while moving the cutting insert 100 in the third feed direction B1. In the pushing and corner machining, the workpiece 200 is machined using the first cutting edge portion 1.
  • the pulling is performed while moving the cutting insert 100 in the fourth feed direction B2. In the pulling, the workpiece 200 is machined using the second cutting edge portion 2.
  • the third feed direction B1 is perpendicular to the rotation axis X of the workpiece 200.
  • the fourth feed direction B2 is parallel to the rotation axis X of the workpiece 200.
  • the cutting edge 10 has a first cutting edge portion 1 for corner machining, a second cutting edge portion 2 for drawing, a third cutting edge portion 3 for finishing surface machining, a first connecting cutting edge portion 11 connecting the first cutting edge portion 1 and the third cutting edge portion 3, and a second connecting cutting edge portion 12 connecting the second cutting edge portion 2 and the third cutting edge portion 3.
  • the third cutting edge portion 3 is disposed between the first cutting edge portion 1 and the second cutting edge portion 2.
  • the first cutting edge portion 1 has a curved shape.
  • the radius of curvature of the first cutting edge portion 1 is 0.1 mm or more and 2.4 mm or less.
  • the cutting insert 100 according to this embodiment has a first cutting edge portion 1 for corner machining, so it can perform corner machining and copying. Furthermore, the cutting insert 100 according to this embodiment has a second cutting edge portion 2 for drawing machining, so it can perform drawing machining.
  • the feed force during the drawing process can be reduced. This makes it possible to suppress damage to the cutting edge 10. As a result, the tool life can be improved. Furthermore, it is possible to suppress the cutting insert 100 from being pulled out of the holder 150 during the drawing process.
  • the cutting insert 100 according to this embodiment has the third cutting edge portion 3 for finishing the surface, the roughness of the finished surface can be significantly improved. Therefore, a stable and good surface roughness can be obtained even in high-efficiency machining.
  • high-efficiency machining refers to machining in which the volume of the workpiece 200 that can be removed per unit time is, for example, 10 cm3 /min or more.
  • the clearance angle of each of the first cutting edge portion 1, the second cutting edge portion 2, and the third cutting edge portion 3 may be greater than or equal to 3° and less than or equal to 20°.
  • the clearance surface 30 may have a first clearance region 71 and a second clearance region 72.
  • the clearance angle of the first clearance region 71 may be 0°.
  • the clearance angle of the second clearance region 72 may be 3° or more and 20° or less.
  • the value obtained by dividing the first area by the second area may be 0.2 or more and 1 or less.
  • the first escape region 71 and the second escape region 72 are portions that come into contact with the holder 150. Compared to the second escape region 72, the first escape region 71 has a larger contact area with the holder 150. When the area of the cutting insert 100 that comes into contact with the holder 150 becomes larger, the restraining performance between the holder 150 and the cutting insert 100 becomes higher. As a result, the cutting insert 100 becomes less likely to be pulled out of the holder 150. By setting the value obtained by dividing the first area by the second area to be 0.2 or more and 1 or less, the cutting insert 100 can be further prevented from being pulled out of the holder 150.
  • the ridge 20 may have a first ridge region 81 and a second ridge region 82.
  • the clearance angle of the first ridge region 81 may be 0°.
  • the clearance angle of the second ridge region 82 may be 3° or more and 20° or less.
  • the value obtained by dividing the first length by the second length may be greater than 0.5 and less than or equal to 1. This makes it possible to further prevent the cutting insert 100 from being pulled out of the holder 150, while suppressing chatter and waviness in high-efficiency machining of hardened steel.
  • the side rake angle ⁇ 7 of the second cutting edge portion 2 may be greater than or equal to -20° and less than or equal to 10°. This reduces the load on the second cutting edge portion 2. As a result, damage to the second cutting edge portion 2 can be suppressed. Therefore, the life of the cutting insert 100 can be further extended.
  • the side cutting edge angle ⁇ 5 of the first cutting edge portion 1 in the pushing process may be 30° or more and less than 70°.
  • the side cutting edge angle ⁇ 6 of the second cutting edge portion 2 in the pulling process may be 70° or more and less than 89°. This reduces the load on the first cutting edge portion 1 and the second cutting edge portion 2. As a result, damage to the first cutting edge portion 1 and the second cutting edge portion 2 can be suppressed. Therefore, the life of the cutting insert 100 can be further extended.
  • Cutting inserts 100 (samples S1 to S32) having the shapes described in Tables 1 and 2 were prototyped and evaluated for cutting under the following conditions.
  • the cutting inserts 100 of samples S1 to S32 have a blade member 6 and a base metal 7 (see Figure 1).
  • the material of the blade member 6 was a cBN-based sintered body.
  • the first cutting edge, the second cutting edge, the third cutting edge, the first connecting portion, and the second connecting portion correspond to the first cutting edge portion 1, the second cutting edge portion 2, the third cutting edge portion 3, the first connecting cutting edge portion 11, and the second connecting cutting edge portion 12, respectively.
  • the clearance angles are the clearance angles of the first cutting edge portion 1, the second cutting edge portion 2, and the third cutting edge portion 3.
  • the seventh angle ⁇ 7 is the side rake angle of the second cutting edge portion 2 (see FIG. 12).
  • the fifth angle ⁇ 5 is the side cutting edge angle of the first cutting edge portion 1 (see FIG. 11).
  • the sixth angle ⁇ 6 is the side cutting edge angle of the second cutting edge portion 2 (see FIG. 11).
  • Cutting inserts 100 of samples S1 to S22 and samples S26 to S32 are examples.
  • the radius of curvature of the first cutting edge portion 1 is 0.1 mm or more and 2.4 mm or less.
  • the second cutting edge portion 2 is linear or curved with a radius of curvature of 3 mm or more.
  • the third cutting edge portion 3 is linear or curved with a radius of curvature of 3 mm or more.
  • Cutting inserts 100 of samples S23 to S25 are comparative examples.
  • the radius of curvature of the first cutting edge portion 1 was 0.09 mm.
  • the second cutting edge portion 2 was curved with a radius of curvature of 2 mm.
  • the third cutting edge portion 3 was curved with a radius of curvature of 2 mm.
  • the cutting time was evaluated when the cutting edge 10 of the cutting insert 100 was chipped or when the ten-point average roughness Rz of the machined surface exceeded 12.5 ⁇ m, whichever was shorter.
  • the clearance angles of the first cutting edge portion 1, the second cutting edge portion 2, and the third cutting edge portion 3 are 3° and 2°, respectively.
  • Table 1 it was confirmed that the cutting inserts 100 have a long tool life when the clearance angles of the first cutting edge portion 1, the second cutting edge portion 2, and the third cutting edge portion 3 are 3° or more.
  • the clearance angles of the first cutting edge portion 1, the second cutting edge portion 2, and the third cutting edge portion 3 are 20° and 21°, respectively.
  • Table 1 it was confirmed that the cutting inserts 100 have a long tool life when the clearance angles of the first cutting edge portion 1, the second cutting edge portion 2, and the third cutting edge portion 3 are 20° or less.
  • the side rake angles (seventh angle ⁇ 7) of the second cutting edge portion 2 are 10° and 11°, respectively. As shown in Table 1, it was confirmed that the cutting inserts 100 have a long tool life when the seventh angle ⁇ 7 is 10° or less.
  • the side rake angle (seventh angle ⁇ 7) of the second cutting edge portion 2 is -20° and -21°, respectively.
  • Table 1 it was confirmed that the cutting inserts 100 have a long tool life when the seventh angle ⁇ 7 is -20° or more.
  • the lateral cutting edge angle (fifth angle ⁇ 5) of the first cutting edge portion 1 is 30° and 70°, respectively.
  • the cutting inserts 100 have a long tool life when the fifth angle ⁇ 5 is 30° or more and 70° or less.
  • the side cutting edge angle (sixth angle ⁇ 6) of the second cutting edge portion 2 is 70° and 89°, respectively. As shown in Table 1, it was confirmed that the cutting inserts 100 have a long tool life when the sixth angle ⁇ 6 is 70° or more and 89° or less.
  • the first clearance region 71 has a clearance angle of 0°.
  • the second clearance region 72 has a clearance angle of 3° or more and 20° or less.
  • the area of the first clearance region 71 is a first area SN.
  • the area of the second clearance region 72 is a second area SP.
  • the value obtained by dividing the first area SN by the sum of the first area SN and the second area SP is 0.05 or more and 0.95 or less.
  • the first ridge region 81 has a clearance angle of 0°.
  • the second ridge region 82 has a clearance angle of 3° or more and 20° or less.
  • the length of the first ridge region 81 is a first length LN.
  • the length of the second ridge region 82 is a second length LP.
  • the value obtained by dividing the first length LN by the sum of the first length LN and the second length LP is 0.05 or more and 0.95 or less.
  • the clearance angles of the second clearance region 72 are 3° and 20°, respectively. As shown in Table 2, it was confirmed that the cutting inserts 100 have a long tool life when the clearance angle of the second clearance region 72 is 3° or more and 20° or less.
  • the cutting insert 100 has a long tool life when the value obtained by dividing the first area SN by the sum of the first area SN and the second area SP is 0.05 or more and 0.95 or less.
  • the cutting insert 100 has a long tool life when the value obtained by dividing the first length LN by the sum of the first length LN and the second length LP is 0.05 or more and 0.95 or less.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Milling Processes (AREA)
PCT/JP2023/039890 2022-11-07 2023-11-06 切削インサートおよび加工方法 Ceased WO2024101308A1 (ja)

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EP23888656.8A EP4616980A4 (en) 2022-11-07 2023-11-06 CUTTING PLATE AND SHAPING PROCESS
JP2024543224A JP7612948B2 (ja) 2022-11-07 2023-11-06 切削インサートおよび加工方法
CN202380076392.7A CN120187549A (zh) 2022-11-07 2023-11-06 切削刀片以及加工方法
KR1020257014219A KR20250100648A (ko) 2022-11-07 2023-11-06 절삭 인서트 및 가공 방법
JP2024227176A JP2025038218A (ja) 2022-11-07 2024-12-24 切削インサートおよび加工方法

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JP7794386B1 (ja) * 2024-11-01 2026-01-06 住友電工ハードメタル株式会社 切削インサートおよび切削工具

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JP2018534159A (ja) * 2015-10-09 2018-11-22 サンドビック インテレクチュアル プロパティー アクティエボラーグ 旋削インサートおよび方法
WO2019087496A1 (ja) 2017-10-31 2019-05-09 住友電工ハードメタル株式会社 切削インサート
JP2022178143A (ja) 2021-05-19 2022-12-02 積水ハウス株式会社 情報処理装置及びプログラム

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JP6874652B2 (ja) 2017-11-09 2021-05-19 トヨタ自動車株式会社 電池システム

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JP2018534159A (ja) * 2015-10-09 2018-11-22 サンドビック インテレクチュアル プロパティー アクティエボラーグ 旋削インサートおよび方法
WO2019087496A1 (ja) 2017-10-31 2019-05-09 住友電工ハードメタル株式会社 切削インサート
JP2022178143A (ja) 2021-05-19 2022-12-02 積水ハウス株式会社 情報処理装置及びプログラム

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Publication number Priority date Publication date Assignee Title
JP7794386B1 (ja) * 2024-11-01 2026-01-06 住友電工ハードメタル株式会社 切削インサートおよび切削工具

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CN120187549A (zh) 2025-06-20
JP2025038218A (ja) 2025-03-18
EP4616980A4 (en) 2026-03-11

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