WO2018061408A1 - 切削工具 - Google Patents
切削工具 Download PDFInfo
- Publication number
- WO2018061408A1 WO2018061408A1 PCT/JP2017/025550 JP2017025550W WO2018061408A1 WO 2018061408 A1 WO2018061408 A1 WO 2018061408A1 JP 2017025550 W JP2017025550 W JP 2017025550W WO 2018061408 A1 WO2018061408 A1 WO 2018061408A1
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- WIPO (PCT)
- Prior art keywords
- rake face
- cutting tool
- top surface
- face
- cutting edge
- Prior art date
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- 238000005520 cutting process Methods 0.000 title claims abstract description 141
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 59
- 239000010432 diamond Substances 0.000 claims abstract description 59
- 239000000463 material Substances 0.000 claims abstract description 21
- 239000000758 substrate Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- JNDMLEXHDPKVFC-UHFFFAOYSA-N aluminum;oxygen(2-);yttrium(3+) Chemical compound [O-2].[O-2].[O-2].[Al+3].[Y+3] JNDMLEXHDPKVFC-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001678 irradiating effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910019901 yttrium aluminum garnet Inorganic materials 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 238000004050 hot filament vapor deposition Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- 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
- B23C5/12—Cutters specially designed for producing particular profiles
- B23C5/14—Cutters specially designed for producing particular profiles essentially comprising curves
-
- 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
- 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
- B23B27/146—Means to improve the adhesion between the substrate and the coating
-
- 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
- B23B27/18—Cutting tools of which the bits or tips or cutting inserts are of special material with cutting bits or tips or cutting inserts rigidly mounted, e.g. by brazing
- B23B27/20—Cutting tools of which the bits or tips or cutting inserts are of special material with cutting bits or tips or cutting inserts rigidly mounted, e.g. by brazing with diamond bits or cutting inserts
-
- 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
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2228/00—Properties of materials of tools or workpieces, materials of tools or workpieces applied in a specific manner
- B23B2228/04—Properties of materials of tools or workpieces, materials of tools or workpieces applied in a specific manner applied by chemical vapour deposition [CVD]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2228/00—Properties of materials of tools or workpieces, materials of tools or workpieces applied in a specific manner
- B23B2228/10—Coatings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2226/00—Materials of tools or workpieces not comprising a metal
- B23C2226/31—Diamond
-
- 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
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
- B23C5/1081—Shank-type cutters, i.e. with an integral shaft with permanently fixed cutting inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
Definitions
- the present invention relates to a cutting tool.
- the present application claims priority based on Japanese Patent Application No. 2016-191640, which is a Japanese patent application filed on September 29, 2016. All the descriptions described in the Japanese patent application are incorporated herein by reference.
- Patent Document 1 a cutting tool described in JP-A-2015-85462
- Patent Document 1 a cutting tool in which a base material is coated with a diamond layer.
- the tool main body of the cutting tool described in Patent Document 1 has a flank, a rake face, and a cutting edge formed on the ridge line of the flank and the rake face.
- the tool body is covered with a hard coating.
- the cutting tool includes a rake face, a flank face connected to the rake face, and a cutting edge constituted by a ridge line between the rake face and the flank face.
- the cutting tool includes a base material having a first surface that is a rake face side and a second face that is a flank face side, and a diamond layer covering the first face and the second face.
- the first surface includes a first top surface that is continuous with the second surface, and a second top surface that is continuous with the first top surface and is disposed so as to sandwich the first top surface with the second surface. .
- the angle formed by the first top surface and the second top surface is a negative angle.
- FIG. 1 is a top view of the cutting tool according to the first embodiment.
- FIG. 2 is an enlarged top view of region II in FIG.
- FIG. 3 is a schematic diagram of cutting using the cutting tool according to the first embodiment.
- 4 is a cross-sectional view taken along line IV-IV in FIG.
- FIG. 5 is an enlarged view of a region V in FIG.
- FIG. 6 is a process diagram of the manufacturing method of the cutting tool according to the first embodiment.
- FIG. 7 is a cross-sectional view of the cutting tool according to the first embodiment after the diamond layer forming step S1 and before the diamond layer removing step S2.
- FIG. 1 is a top view of the cutting tool according to the first embodiment.
- FIG. 2 is an enlarged top view of region II in FIG.
- FIG. 3 is a schematic diagram of cutting using the cutting tool according to the first embodiment.
- 4 is a cross-sectional view taken along line IV-IV in FIG.
- FIG. 5 is an enlarged view of a region V
- FIG. 8 is a cross-sectional view of the cutting tool according to the first embodiment at the stage after the end of the rake face treatment step S21 and before the flank face treatment step S22.
- FIG. 9 is a cross-sectional view of the cutting tool according to the second embodiment in a cross section perpendicular to the cutting edge 13.
- FIG. 10 is an enlarged view of a region X in FIG.
- One aspect of the present invention has been made in view of the above problems, and an object thereof is to provide a cutting tool capable of improving the durability of a cutting edge.
- a cutting tool capable of improving the durability of a cutting edge can be provided.
- the cutting tool which concerns on 1 aspect of this invention is provided with the rake face 11, the flank 12 which continues to the rake face 11, and the cutting edge 13 comprised by the ridgeline of the rake face 11 and the flank 12. Yes.
- the cutting tool covers the base 4 having the first surface 41 that is the surface on the rake face side and the second surface 42 that is the surface on the flank side, and the first surface 41 and the second surface 42. And a diamond layer 5.
- the first surface 41 is arranged so as to sandwich the first top surface 41 a between the first top surface 41 a continuous with the second surface 42 and the first top surface 41 a and between the second surface 42. 2 top surfaces 41b. In the cross section perpendicular to the cutting edge, the angle ⁇ 1 formed by the first top surface 41a and the second top surface 41b is a negative angle.
- the main component force applied in the flank direction during cutting can be supported by the first top surface (negative land surface). Therefore, it can suppress that a diamond layer peels from the flank side. As a result, the durability of the cutting edge can be improved. Furthermore, when it has a 1st top surface compared with the case where it does not have a 1st top surface, the contact area of a base material and a diamond layer increases. Therefore, according to the cutting tool of (1) above, the adhesion of the diamond layer to the substrate can be improved.
- the angle ⁇ 1 formed by the first top surface 41a and the second top surface 41b may be ⁇ 20 ° or more and less than 0 °. Thereby, the durability of the cutting edge can be further improved.
- the radius of curvature R1 of the tip of the cutting edge 13 may be not less than 0.01 ⁇ m and not more than 10 ⁇ m. Thereby, the sharpness of the cutting tool can be improved while maintaining high durability of the cutting edge.
- the rake face 11 is connected to the first rake face part 21 connected to the flank face 12, the first rake face part 21, and the flank face 12.
- pinched may be included.
- the angle ⁇ 2 formed by the first rake face portion 21 and the second rake face portion 22 may be a negative angle.
- the angle ⁇ 2 formed by the first rake face portion 21 and the second rake face portion 22 may be not less than ⁇ 20 ° and less than 0 °.
- the curvature radius R2 of the tip of the cutting edge 13 is obtained by multiplying the thickness of the diamond layer 5 covering the second surface 42 by 0.1. It may be below the value. Thereby, the sharpness of the cutting tool can be improved while suppressing minute chipping of the cutting edge in the initial stage of processing.
- FIG. 1 is a top view of the cutting tool according to the first embodiment.
- the cutting tool according to the first embodiment has a tip portion 1, a body portion 2, and a shank portion 3.
- the cutting tool according to the embodiment is a ball end mill.
- the cutting tool according to the first embodiment is not limited to the ball end mill.
- the cutting tool according to the first embodiment may be a radius end mill or the like.
- FIG. 2 is an enlarged top view of region II in FIG.
- the cutting tool according to the first embodiment has a rake face 11 and a flank 12 (see FIG. 4) at the distal end portion 1.
- the rake face 11 is continuous with the flank face 12.
- a ridge line between the rake face 11 and the flank face 12 forms a cutting edge 13.
- the flank 12 is a regular angle with respect to the rake face 11. In other words, the flank 12 is inclined toward the rake face 11 with respect to a plane that passes through the ridge line and is perpendicular to the rake face 11.
- FIG. 3 is a schematic diagram of cutting using the cutting tool according to the first embodiment. As shown in FIG. 3, in the cutting tool according to the first embodiment, the cutting edge 13 is urged against the work material while rotating about the central axis A. As a result, the work material is cut.
- the cutting tool according to the first embodiment includes a base material 4 and a diamond layer 5.
- a base material 4 for example, a cemented carbide that is a sintered body including a powder such as WC (tungsten carbide) and a binder such as Co (cobalt) is used.
- the base material 4 may be, for example, cermet or ceramics (SiC, Si 3 N 4 ). In addition, the material used for the base material 4 is not restricted to these.
- the diamond layer 5 is, for example, a layer containing diamond crystals.
- the diamond layer 5 is, for example, a diamond polycrystalline film.
- the diamond layer 5 may contain a non-diamond component (for example, an amorphous component).
- the diamond layer 5 may not contain diamond crystals.
- the diamond layer 5 may be a layer of DLC (Diamond Like Carbon).
- the base material 4 has a first surface 41 and a second surface 42.
- the first surface 41 is the surface of the base material 4 on the rake surface 11 side. In other words, the first surface 41 faces the rake surface 11.
- the second surface 42 is a surface of the base material 4 on the flank 12 side. In other words, the second surface 42 faces the flank 12.
- the diamond layer 5 covers the first surface 41 and the second surface 42.
- the first surface 41 has a first top surface 41a and a second top surface 41b.
- the first top surface 41 a is continuous with the second surface 42.
- the second top surface 41b is connected to the first top surface 41a and is disposed so as to sandwich the first top surface 41a with the second surface 42.
- the first top surface 41a is located between the second surface 42 and the second top surface 41b, and connects the second surface 42 and the second top surface 41b.
- the diamond layer 5 is in contact with the second surface 42, the first top surface 41a, and the second top surface 41b.
- the first top surface 41a is inclined with respect to the second top surface 41b.
- the angle ⁇ 1 formed by the first top surface 41a and the second top surface 41b is a negative angle.
- the angle ⁇ 1 is a negative angle when the cutting tool is disposed with the second top surface 41b facing upward and the cutting edge 13 facing left.
- the second top surface 41b is rotated counterclockwise about the boundary line between the first top surface 41a and the second top surface 41b.
- the angle ⁇ 1 is a negative angle when the cutting tool is arranged with the second top surface 41b facing upward and the cutting edge 13 facing left. This refers to the case where the surface 41a is inclined leftward with respect to the second top surface 41b.
- the angle ⁇ 1 formed by the first top surface 41a and the second top surface 41b may be, for example, not less than ⁇ 20 ° and less than 0 °.
- An angle ⁇ 1 formed by the first top surface 41a and the second top surface 41b is an inclination angle of the first top surface 41a with respect to a surface parallel to the second top surface 41b.
- the upper limit of the angle ⁇ 1 may be ⁇ 0.1 ° or ⁇ 3 °.
- the lower limit of the angle ⁇ 1 may be ⁇ 20 ° or ⁇ 10 °.
- the diamond layer 5 covering the second top surface 41b has a thickness h2.
- the thickness h2 is a distance between the second top surface 41b and the rake surface 11 in a direction perpendicular to the second top surface 41b.
- the thickness of the diamond layer 5 covering the first top surface 41a is a thickness h1.
- the thickness h1 is the distance between the rake line 11 and the ridgelines of the first top surface 41a and the second surface 42 in the direction perpendicular to the second top surface 41b.
- the thickness h1 is larger than the thickness h2. Thereby, the durability of the cutting edge 13 can be improved.
- the distance between the ridgeline between the first top surface 41 a and the second top surface 41 b and the cutting edge 13 is a distance L.
- the distance L is a distance in a direction parallel to the rake face 11 in a cross section perpendicular to the cutting edge 13.
- the distance L is preferably 0.001 ⁇ m or more and 5 ⁇ m or less.
- FIG. 5 is an enlarged view of region V in FIG.
- the tip of the cutting edge 13 may be rounded.
- the curvature radius R1 of the tip of the cutting edge 13 is, for example, not less than 0.01 ⁇ m and not more than 10 ⁇ m.
- the upper limit of the radius of curvature R1 may be 10 ⁇ m or 5 ⁇ m.
- the lower limit of the radius of curvature R1 may be 0.01 ⁇ m or 0.1 ⁇ m.
- FIG. 6 is a process diagram of the manufacturing method of the cutting tool according to the first embodiment.
- the cutting tool manufacturing method according to the first embodiment includes a diamond layer forming step S1 and a diamond layer removing step S2.
- the diamond layer removal step S2 may include a rake face treatment step S21 and a flank face treatment step S22.
- FIG. 7 is a cross-sectional view of the cutting tool according to the first embodiment after the diamond layer forming step S1 is completed and before the diamond layer removing step S2 is performed.
- the diamond layer 5 is formed on the substrate 4 in the diamond layer forming step S ⁇ b> 1. Specifically, the first surface 41 and the second surface 42 of the substrate 4 are covered with the diamond layer 5.
- the diamond layer 5 is formed by using, for example, HFCVD (Hot Filament Chemical Vapor Deposition).
- FIG. 8 is a cross-sectional view of the cutting tool according to the first embodiment at the stage after the end of the rake face treatment step S21 and before the flank face treatment step S22.
- the diamond layer 5 covering the first surface 41 of the base material 4 is partially removed.
- the roundness on the rake face 11 side at the tip of the cutting tool is flattened.
- the removal of the diamond layer 5 is performed by irradiating a laser on the rake face 11 side.
- the laser used for removing the diamond layer 5 is, for example, a second harmonic of a YVO 4 laser or a YAG (Yttrium Aluminum Garnet) laser.
- the diamond layer 5 covering the second surface 42 of the substrate 4 is partially removed.
- the partial removal of the diamond layer 5 covering the second surface 42 of the substrate 4 is performed so that the substrate 4 is not exposed from the flank 12.
- Removal of the diamond layer 5 covering the second surface 42 of the substrate 4 is performed by irradiating a laser on the flank 12 side.
- the laser used for removing the diamond layer 5 is, for example, a second harmonic of a YVO 4 laser or a YAG laser.
- the main component force applied in the flank direction during cutting can be supported by the first top surface 41a. Therefore, it can suppress that a diamond layer peels from the flank side. As a result, the durability of the cutting edge 13 can be improved. Furthermore, when it has the 1st top surface 41a compared with the case where it does not have the 1st top surface 41a, the contact area of the base material 4 and the diamond layer 5 increases. Therefore, the cutting tool according to the first embodiment can improve the adhesion of the diamond layer 5 to the base material 4.
- the angle ⁇ 1 formed by the first top surface 41a and the second top surface 41b is not less than ⁇ 20 ° and less than 0 °. Thereby, the durability of the cutting edge can be further improved.
- the curvature radius R1 of the tip of the cutting edge 13 is not less than 0.01 ⁇ m and not more than 10 ⁇ m. Therefore, the sharpness of the cutting tool can be improved while maintaining high durability of the cutting edge.
- FIG. 9 is a cross-sectional view of the cutting tool according to the second embodiment in a cross section perpendicular to the cutting edge 13.
- the cutting tool according to the second embodiment has a rake face 11, a flank face 12, and a cutting edge 13.
- the cutting tool according to the second embodiment has a base material 4 and a diamond layer 5.
- the rake face 11 has a first rake face portion 21 and a second rake face portion 22.
- the first rake face portion 21 continues to the flank face 12.
- the second rake face portion 22 is connected to the first rake face portion 21 and is disposed so as to sandwich the first rake face portion 21 with the flank 12.
- the first rake face 21 is located between the flank 12 and the second rake face 22 and connects the flank 12 and the second rake face 22.
- the first rake face portion 21 is inclined with respect to the second rake face portion 22.
- the angle ⁇ 2 (see FIG. 9) formed by the first rake face portion 21 and the second rake face portion 22 is a negative angle.
- the angle ⁇ 2 is a negative angle when the cutting tool is arranged with the second rake face portion 22 facing upward and the cutting edge 13 facing leftward. This refers to the case where the second rake face portion 22 rotates counterclockwise around the boundary line between the first rake face portion 21 and the second rake face portion 22.
- the angle ⁇ 2 is a negative angle when the cutting tool is disposed with the second rake face portion 22 facing upward and the cutting edge 13 facing left. The case where the surface part 21 inclines to the left downward with respect to the 2nd scoop surface part 22 is said.
- an angle ⁇ 2 formed by the first rake face portion 21 and the second rake face portion 22 is, for example, not less than ⁇ 20 ° and less than 0 °.
- An angle ⁇ ⁇ b> 2 formed between the first rake face portion 21 and the second rake face portion 22 is an inclination angle of the first rake face portion 21 with respect to a plane parallel to the second rake face portion 22.
- the upper limit of the angle ⁇ 2 may be ⁇ 0.1 ° or ⁇ 3 °.
- the lower limit of the angle ⁇ 1 may be ⁇ 20 ° or ⁇ 10 °.
- FIG. 10 is an enlarged view of region X in FIG.
- the tip of the cutting edge 13 may be rounded.
- the radius of curvature R2 of the tip of the cutting edge 13 is, for example, not more than a value obtained by multiplying the thickness of the diamond layer 5 covering the second surface 42 by 0.1.
- the thickness of the diamond layer 5 covering the second surface 42 is the thickness of the diamond layer 5 in the direction perpendicular to the second surface 42.
- the radius of curvature R2 may be equal to or less than a value obtained by multiplying the thickness of the diamond layer 5 covering the second surface 42 by 0.001 or may be equal to or less than a value obtained by multiplying 0.01.
- the manufacturing method of the cutting tool which concerns on 2nd Embodiment is demonstrated.
- the diamond layer 5 near the cutting edge 13 is further removed.
- the diamond layer 5 is removed by irradiating the diamond layer 5 facing the first top surface 41a with a laser. Thereby, the 1st rake face part 21 is formed.
- the laser used for removing the diamond layer 5 is, for example, a second harmonic of a YVO 4 laser.
- the rake face 11 is connected to the first rake face part 21 connected to the flank face 12 and the first rake face part 21 and the first rake face part 21 between the rake face 12. 2nd rake face part 22 arranged so that it may pinch.
- the angle ⁇ 2 formed by the first rake face portion 21 and the second rake face portion 22 is a negative angle.
- the angle ⁇ 2 formed by the first rake face portion 21 and the second rake face portion 22 is ⁇ 20 ° or more and less than 0 °.
- the radius of curvature R2 of the tip of the cutting edge 13 is not more than a value obtained by multiplying the thickness of the diamond layer 5 covering the second surface 42 by 0.1. Therefore, the sharpness of the cutting tool can be improved while suppressing minute chipping of the cutting edge in the initial stage of processing.
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Abstract
Description
しかしながら、特許文献1に記載の切削工具においては、切削加工時に切削工具が被削材から受ける主分力により、硬質皮膜が工具本体の逃げ面側から剥離しやすい。そのため、特許文献1に記載の切削工具の切れ刃の耐久性は十分ではない。
本発明の一態様によれば、切れ刃の耐久性を向上することができる切削工具を提供することができる。
最初に本発明の実施態様を列記して説明する。
以下に、本発明の実施形態の詳細について図を参照して説明する。なお、各図において、同一または相当部分には同一符号を付している。また、以下に記載する実施の形態の少なくとも一部を任意に組み合わせてもよい。
以下に、第1の実施形態に係る切削工具の構成について説明する。
図6は、第1の実施形態に係る切削工具の製造方法の工程図である。図6に示すように、第1の実施形態に係る切削工具の製造方法は、ダイヤモンド層形成工程S1と、ダイヤモンド層除去工程S2とを有している。ダイヤモンド層除去工程S2は、すくい面処理工程S21と、逃げ面処理工程S22とを含んでいてもよい。
第1の実施形態に係る切削工具によれば、切削時に逃げ面方向に加えられる主分力を第1頂面41aによって下支えすることができる。そのため、ダイヤモンド層が逃げ面側から剥離することを抑制することができる。結果として、切れ刃13の耐久性を向上することができる。さらに第1頂面41aを有しない場合と比較して、第1頂面41aを有する場合は、基材4とダイヤモンド層5との接触面積が増加する。そのため、第1の実施形態に係る切削工具は、基材4に対するダイヤモンド層5の密着性を向上することができる。
以下に、第2の実施形態に係る切削工具の構成について説明する。なお、以下においては、第1の実施形態に係る切削工具と異なる点について主に説明し、同様の説明については繰り返さない。
第2の実施形態に係る切削工具において、すくい面11は、逃げ面12に連なる第1すくい面部21と、第1すくい面部21に連なり、かつ逃げ面12との間で第1すくい面部21を挟み込むように配置されている第2すくい面部22とを含んでいる。切れ刃13に垂直な断面において、第1すくい面部21と第2すくい面部22とのなす角度θ2は、負角となっている。これにより、加工初期における切れ刃の微小チッピングを抑制することができる。
Claims (6)
- すくい面と、前記すくい面に連なる逃げ面と、前記すくい面と前記逃げ面との稜線により構成される切れ刃とを備える切削工具であって、
前記すくい面側の面である第1面と、前記逃げ面側の面である第2面とを有する基材と、
前記第1面及び前記第2面を被覆しているダイヤモンド層とを備え、
前記第1面は、前記第2面に連なる第1頂面と、前記第1頂面に連なり、かつ前記第2面との間で前記第1頂面を挟み込むように配置されている第2頂面とを含み、
前記切れ刃に垂直な断面において、前記第1頂面と前記第2頂面とのなす角度は、負角となっている、切削工具。 - 前記第1頂面と前記第2頂面とのなす角度は、-20°以上0°未満である、請求項1に記載の切削工具。
- 前記切れ刃の先端の曲率半径は、0.01μm以上10μm以下である、請求項1または請求項2に記載の切削工具。
- 前記すくい面は、前記逃げ面に連なる第1すくい面部と、前記第1すくい面部に連なり、かつ前記逃げ面との間で前記第1すくい面部を挟み込むように配置されている第2すくい面部とを含み、
前記切れ刃に垂直な断面において、前記第1すくい面部と前記第2すくい面部とのなす角度は、負角となっている、請求項1または請求項2に記載の切削工具。 - 前記第1すくい面部と前記第2すくい面部とのなす角度は、-20°以上0°未満である、請求項4に記載の切削工具。
- 前記切れ刃の先端の曲率半径は、前記第2面を被覆している前記ダイヤモンド層の厚さに0.1を乗じた値以下である、請求項4または請求項5に記載の切削工具。
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KR1020197008527A KR20190060993A (ko) | 2016-09-29 | 2017-07-13 | 절삭 공구 |
EP17855366.5A EP3520939A4 (en) | 2016-09-29 | 2017-07-13 | CUTTING TOOL |
US16/335,550 US11376668B2 (en) | 2016-09-29 | 2017-07-13 | Cutting tool |
JP2018541935A JPWO2018061408A1 (ja) | 2016-09-29 | 2017-07-13 | 切削工具 |
CN201780059251.9A CN109789496A (zh) | 2016-09-29 | 2017-07-13 | 切削工具 |
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EP (1) | EP3520939A4 (ja) |
JP (1) | JPWO2018061408A1 (ja) |
KR (1) | KR20190060993A (ja) |
CN (1) | CN109789496A (ja) |
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EP3479938A4 (en) * | 2016-06-29 | 2020-03-04 | Sumitomo Electric Hardmetal Corp. | CUTTING TOOL |
JP7001245B2 (ja) * | 2019-08-01 | 2022-01-19 | 住友電工ハードメタル株式会社 | 切削工具の製造方法 |
WO2021054019A1 (ja) * | 2019-09-18 | 2021-03-25 | 住友電工ハードメタル株式会社 | ダイヤモンド切削工具 |
JP7140786B2 (ja) * | 2020-01-10 | 2022-09-21 | ユニオンツール株式会社 | 硬脆材切削加工用回転切削工具 |
CN113441773A (zh) * | 2020-03-27 | 2021-09-28 | 京瓷株式会社 | 立铣刀及其刀片 |
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US11376668B2 (en) | 2022-07-05 |
CN109789496A (zh) | 2019-05-21 |
KR20190060993A (ko) | 2019-06-04 |
TW201813742A (zh) | 2018-04-16 |
EP3520939A1 (en) | 2019-08-07 |
US20190344355A1 (en) | 2019-11-14 |
EP3520939A4 (en) | 2020-05-27 |
JPWO2018061408A1 (ja) | 2019-07-18 |
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