WO2024195286A1 - ホルダ、切削工具及び切削加工物の製造方法 - Google Patents

ホルダ、切削工具及び切削加工物の製造方法 Download PDF

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Publication number
WO2024195286A1
WO2024195286A1 PCT/JP2024/002153 JP2024002153W WO2024195286A1 WO 2024195286 A1 WO2024195286 A1 WO 2024195286A1 JP 2024002153 W JP2024002153 W JP 2024002153W WO 2024195286 A1 WO2024195286 A1 WO 2024195286A1
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WO
WIPO (PCT)
Prior art keywords
flow path
pocket
cutting tool
holder
cutting
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/JP2024/002153
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English (en)
French (fr)
Japanese (ja)
Inventor
雅大 山本
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.)
Kyocera Corp
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Kyocera 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 Kyocera Corp filed Critical Kyocera Corp
Priority to JP2025508165A priority Critical patent/JPWO2024195286A1/ja
Priority to DE112024001320.1T priority patent/DE112024001320T5/de
Publication of WO2024195286A1 publication Critical patent/WO2024195286A1/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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/28—Features relating to lubricating or cooling
    • B23C5/283—Cutting inserts with internal coolant channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/04—Overall shape
    • B23C2200/0416—Irregular

Definitions

  • This disclosure generally relates to a holder and a cutting tool used in cutting a workpiece, and a method for manufacturing a cut product. More specifically, this disclosure relates to a cutting tool used in turning.
  • Milling cutters and the like are known cutting tools used when cutting workpieces such as metals.
  • cutting tools include those described in International Publication No. 2016/121870 (Patent Document 1) and JP 2018-86716 A (Patent Document 2).
  • the cutting tool described in Patent Document 1 includes a holder and an insert.
  • the holder has a pocket, a first flow passage located therein, and an outlet located in the pocket. Coolant flows through the first flow passage. The coolant flows through the first flow passage toward the outlet.
  • the pocket also has a mounting portion where the insert is located, and a cutout portion adjacent to the mounting portion and located forward of the mounting portion in the direction of rotation. The cutout portion has a recess. The coolant is sprayed toward the recess.
  • the cutting tool described in Patent Document 2 includes a holder and an insert.
  • the holder has a pocket in which the insert is located, and an outlet located in the pocket.
  • the pocket has a first surface that faces the side surface of the insert on the outer periphery of the holder.
  • the first surface has a first groove through which the coolant flows.
  • the non-limiting one-sided holder of the present disclosure comprises a cylindrical body extending from a first end to a second end along a rotation axis.
  • the body comprises an end face located on the side of the first end, an outer circumferential surface, a plurality of pockets opening to the end face and the outer circumferential surface, and a flow path through which coolant flows.
  • the flow path comprises a first flow path having a linear shape extending toward the outer circumferential surface, and a second flow path having a linear shape extending from the first flow path toward the outer circumferential surface.
  • the flow path comprises a protrusion located at the connection portion of the first flow path and the second flow path, protruding from the second flow path toward the central axis of the first flow path.
  • FIG. 2 is a perspective view showing a non-limiting one-sided holder (cutting tool) of the present disclosure.
  • FIG. 2 is an enlarged view of a region II shown in FIG. 1 .
  • 2 is an enlarged view of a pocket in the holder (cutting tool) shown in FIG. 1 and its surroundings, with a flow path and the like seen through;
  • FIG. FIG. 2 is a plan view of the holder (cutting tool) shown in FIG. 1 as viewed from a first end side.
  • FIG. 5 is the same plan view as FIG. 4, but showing the flow paths in a transparent manner.
  • FIG. 5 is an enlarged view of region VI shown in FIG. 4 .
  • FIG. 6 is an enlarged view of a portion of the holder (cutting tool) shown in FIG. 5 .
  • FIG. 8 is a cross-sectional view of the holder (cutting tool) shown in FIG. 7 along section VIII, the cross-sectional view including the central axis of the first flow passage.
  • 9 is a cross-sectional view of the holder (cutting tool) shown in FIG. 7 along cross section IX, the cross section including the central axis of the second flow passage.
  • 2 is a perspective view of the holder (cutting tool) shown in FIG. 1 as viewed from a different direction, with a part of the holder being enlarged and a flow path being seen through the perspective view.
  • FIG. 11 is a cross-sectional view of the holder (cutting tool) shown in FIG.
  • FIG. 2 is a plan view of the holder shown in FIG. 1 as seen from a first end side, with a flow path seen through;
  • FIG. 13 is an enlarged view of region XIII shown in FIG. 12 .
  • FIG. 2 is a perspective view of a cutting insert in the cutting tool shown in FIG. 1 .
  • FIG. 15 is a perspective view of the cutting insert shown in FIG. 14 as viewed from another direction.
  • FIG. 12 is a cross-sectional view showing a non-limiting one-sided holder (cutting tool) of the present disclosure, corresponding to FIG. 11 .
  • FIG. 2 is a schematic diagram showing a step in a non-limiting method of manufacturing a one-sided machined product according to the present disclosure.
  • FIG. 2 is a schematic diagram showing a step in a non-limiting method of manufacturing a one-sided machined product according to the present disclosure.
  • FIG. 2 is a schematic diagram showing a step in a non-limiting method of manufacturing a one-sided machined product according to the present disclosure.
  • the non-limiting one-sided holder 1 of the present disclosure will be described in detail with reference to the drawings.
  • the holder 1 may include any component member not shown in each of the drawings referred to.
  • the dimensions of the components in each drawing do not faithfully represent the dimensions of the actual components and the dimensional ratios of each component.
  • the holder 1 may include a main body 3, as shown in the non-limiting example in Figs. 1 to 13.
  • the main body 3 may be a columnar body extending from a first end 3a to a second end 3b along the rotation axis O1, as shown in the non-limiting example in Fig. 1.
  • the first end 3a is called the "tip” and the second end 3b is called the "rear end.”
  • the main body 3 can rotate around the rotation axis O1.
  • the arrow Y1 in FIG. 1 and other figures may indicate the direction of rotation of the rotation axis O1, or may indicate the direction of rotation of the main body 3 around the rotation axis O1.
  • the main body 3 may be a cylindrical body. Note that the cylindrical body may be generally cylindrical, and does not have to be cylindrical in the strict sense.
  • the body 3 is not limited to a specific size.
  • the length of the body 3 in the direction along the rotation axis O1 may be set to approximately 30 to 80 mm.
  • the width (diameter) of the body 3 in the direction perpendicular to the rotation axis O1 may be set to approximately 20 to 400 mm.
  • the main body 3 may have an end face 5 located on the side of the first end 3a and an outer peripheral surface 7, as shown in a non-limiting example in FIG. 2.
  • the main body 3 may also have a plurality of pockets 9. Each of the plurality of pockets 9 may open to the end face 5 and the outer peripheral surface 7.
  • a cutting insert can be attached to each of the plurality of pockets 9.
  • the multiple pockets 9 may be positioned at equal intervals around the rotation axis O1, or may be positioned at unequal intervals.
  • the number of pockets 9 may be approximately 2 to 40.
  • the main body 3 may have a flow path 11 through which the coolant flows, as shown in a non-limiting example in FIG. 5.
  • the flow path 11 may be located inside the main body 3.
  • the flow path 11 may also be, for example, circular, elliptical, or polygonal in a cross section perpendicular to the direction in which the coolant flows.
  • the inner diameter of the flow path 11 may be set to, for example, about 0.5 to 5 mm.
  • the flow path 11 may include a first flow path 13 and a second flow path 15, as shown in a non-limiting example in FIG. 5.
  • the first flow path 13 may extend toward the outer circumferential surface 7.
  • the first flow path 13 may also be linear.
  • the second flow path 15 may extend from the first flow path 13 toward the outer peripheral surface 7.
  • the second flow path 15 may branch off from the first flow path 13 and extend toward the outer peripheral surface 7.
  • a portion of the coolant flowing through the first flow path 13 may flow into the second flow path 15.
  • the second flow path 15 may also be linear.
  • the flow path 11 may have a protrusion 17, as in a non-limiting example shown in FIG. 11.
  • the protrusion 17 may be located at the connection portion 19 of the first flow path 13 and the second flow path 15.
  • the protrusion 17 may also protrude from the second flow path 15 toward the central axis O2 of the first flow path 13. In these cases, the protrusion 17 makes it possible to increase the amount of coolant flowing into the second flow path 15. Therefore, according to the holder 1, when the flow paths 11 through which the coolant flows formed within the holder 1 branch off, it is possible to adjust the amount of coolant flowing into each of the flow paths 11.
  • the protrusion 17 in a cross section including the central axis O2 of the first flow passage 13 and the central axis O3 of the second flow passage 15, at least a part of the protrusion 17 may be located outside the connection portion 19. In other words, in the above cross section, at least a part of the protrusion 17 may be located at the outermost part of the connection portion 19. In this case, the protrusion 17 makes it easier to increase the amount of coolant flowing into the second flow passage 15.
  • the outer side may mean the side away from the rotation axis O1.
  • the central axis O2 of the first flow passage 13 may be referred to as the first central axis O2
  • the central axis O3 of the second flow passage 15 may be referred to as the second central axis O3.
  • the protruding portion 17 may be referred to as a projection. Furthermore, the protruding portion 17 does not have to protrude beyond the central axis O2 of the first flow path 13. In other words, the tip 17a of the protruding portion 17 may be located closer to the connection portion 19 than the central axis O2 of the first flow path 13. In this case, it is easy to avoid an excessive amount of coolant flowing into the second flow path 15.
  • the protrusion 17 may protrude along the direction in which the second flow path 15 extends. In other words, the protrusion 17 may protrude along the central axis O3 of the second flow path 15.
  • the protrusion 17 may be formed integrally with the main body 3. Note that, in the non-limiting example shown in FIG. 11, the protrusion 17 is hatched differently from the main body 3 to facilitate visual understanding. This is also true in FIG. 16, which will be described later.
  • connection portion 19 may be referred to as a branch port.
  • the connection portion 19 may be ring-shaped.
  • the protrusion 17 may be located around the entire circumference of the ring-shaped connection portion 19, or may be located partially around it.
  • the method for processing the flow channel 11 is not particularly limited. For example, it may be a method using a tool such as a drill or a method using a 3D printer.
  • the pocket 9 may have a first pocket 21 and a second pocket 23, as shown in a non-limiting example in FIG. 7 and FIG. 13.
  • the first flow passage 13 may open at the first pocket 21.
  • the second flow passage 15 may open at the second pocket 23.
  • the openings of the first flow passage 13 and the second flow passage 15 at the pocket 9 may function as outlets for allowing the coolant to flow out.
  • the first flow passage 13 may extend from the second end 3b toward the first pocket 21, as in a non-limiting example shown in FIG. 8.
  • the first flow passage 13 may also be inclined so as to approach the first end 3a as it approaches the first pocket 21 (outer peripheral surface 7).
  • the first flow passage 13 may also open on the side of the rotation axis O1 of the main body 3, as in a non-limiting example shown in FIG. 8. This opening may function as an inlet for allowing coolant to flow into the inside of the first flow passage 13.
  • the position of this opening is not particularly limited.
  • the inner diameter of the second flow passage 15 may be the same as the inner diameter of the first flow passage 13. In this case, it is possible to adjust the amount of coolant using only the protrusion 17. In addition, the first flow passage 13 and the second flow passage 15 can be machined using the same tool, making it easy to manufacture the holder 1.
  • the inner diameter of the second flow path 15 being the same as the inner diameter of the first flow path 13 does not necessarily mean that the two values are exactly the same. For example, there may be a difference of about 10% between the two values. Furthermore, the inner diameters of the two are not necessarily the same. They may be different. The inner diameters of the first flow path 13 and the second flow path 15 may be constant.
  • the second pocket 23 may be adjacent to the first pocket 21 at the rear of the rotation direction Y1 of the rotation axis O1, as in a non-limiting example shown in Figures 7 and 13. In this case, it is easy to shorten the length of the second flow path 15. Therefore, it is easy to ensure the thickness of the main body 3 between the first pocket 21 and the second pocket 23. Therefore, the durability of the holder 1 is high.
  • Materials for the main body 3 include, for example, aluminum alloy, steel, and cast iron. If the main body 3 is made of steel, the main body 3 has high toughness.
  • Coolants may include, for example, water-insoluble oils and water-soluble oils.
  • Water-insoluble oils may include, for example, cutting oils such as oil-based, inactive extreme pressure, and active extreme pressure.
  • Water-soluble oils may include, for example, cutting oils such as emulsions, solubles, and solutions.
  • Coolants are not limited to liquids, and may be gases such as inert gases. Coolants may also be referred to as cooling fluids. Coolants may be appropriately selected and used depending on the material of the workpiece.
  • holder 1A of the present disclosure will be described with reference to the drawings.
  • the differences between holder 1A and holder 1 will be mainly described, and detailed descriptions of the same configuration as holder 1 may be omitted. Therefore, the description of holder 1 may be used to understand the configuration of holder 1A.
  • the protrusion 17 in a cross section including the central axis O2 of the first flow path 13 and the central axis O3 of the second flow path 15, at least a part of the protrusion 17 may be located inside the connection portion 19.
  • at least a part of the protrusion 17 may be located at the innermost part of the connection portion 19.
  • the protrusion 17 makes it easier to increase the amount of coolant flowing into the second flow path 15.
  • the inside may mean the side closer to the rotation axis O1.
  • the cutting tool 101 may include a holder 1 and a cutting insert 103, as shown in the non-limiting example in Figures 1 to 15.
  • a holder 1 When the cutting tool 101 includes a holder 1, it is possible to adjust the amount of coolant flowing into the branched flow passage 11, and therefore excellent cutting performance can be achieved.
  • the cutting tool 101 may also be used for milling.
  • the cutting insert 103 may simply be called the insert 103.
  • the insert 103 can be used to cut a workpiece in a cutting process.
  • the number of inserts 103 may be multiple. That is, the cutting tool 101 may include multiple inserts 103. The multiple inserts 103 may be located in multiple pockets 9. The number of inserts 103 may be the same as the number of pockets 9.
  • the insert 103 may be a columnar body, as shown in a non-limiting example in FIG. 14 and FIG. 15.
  • the insert 103 may also have a cutting edge 105.
  • the cutting tool 101 can perform cutting by bringing the cutting edge 105 of the insert 103 into contact with the workpiece.
  • the insert 103 may be positioned in the pocket 9 such that at least a portion of the cutting edge 105 protrudes from the holder 1, as in a non-limiting example shown in FIG. 2.
  • the cutting edge 105 may have a first cutting edge 107 located on the first end 3a side and a second cutting edge 109 located on the outer periphery side. Note that the outer periphery side may mean the side away from the rotation axis O1.
  • the insert 103 may include a first insert 111 and a second insert 113, as shown in a non-limiting example in FIG. 7.
  • the first insert 111 may be located in the first pocket 21.
  • the second insert 113 may be located in the second pocket 23.
  • the first flow passage 13 may extend toward the side surface 115 of the first insert 111 that faces the main body 3, as shown in a non-limiting example in FIG. 8.
  • the second flow passage 15 may extend toward the cutting edge 105 of the second insert 113, as shown in a non-limiting example in FIG. 9. In these cases, it becomes possible to appropriately supply coolant to the required location.
  • Materials for the insert 103 may include, for example, cemented carbide, cermet, ceramics, PCD (polycrystalline diamond), and cBN (cubic boron nitride).
  • Cemented carbide compositions may include, for example, WC-Co, WC-TiC-Co, and WC-TiC-TaC-Co, where WC, TiC, and TaC may be hard particles, and Co may be a binder phase.
  • the cermet may be a sintered composite material in which a ceramic component is combined with a metal.
  • a cermet is a titanium compound whose main component is titanium carbide (TiC) or titanium nitride (TiN). It goes without saying that the material of the insert 103 is not limited to the above composition.
  • the insert 103 may be made of only one member, or may be made of multiple members.
  • the member where the cutting edge 105 is located may be made of a material with a relatively high hardness, such as PCD and cBN.
  • the member where the cutting edge 105 is not located may be made of, for example, cemented carbide, cermet, ceramics, etc.
  • the surface of the insert 103 may be coated with a coating using a chemical vapor deposition (CVD) or physical vapor deposition ( PVD ) method, the composition of the coating may include, for example, titanium carbide (TiC), titanium nitride (TiN), titanium carbonitride (TiCN), and alumina ( Al2O3 ).
  • CVD chemical vapor deposition
  • PVD physical vapor deposition
  • the composition of the coating may include, for example, titanium carbide (TiC), titanium nitride (TiN), titanium carbonitride (TiCN), and alumina ( Al2O3 ).
  • the cutting tool 101 may include a fixing member 117, as shown in a non-limiting example in FIG. 1.
  • the fixing member 117 may be a member for fixing the insert 103 to the holder 1.
  • the number of fixing members 117 may be the same as the number of inserts 103.
  • the fixing member 117 may be a screw, as shown in a non-limiting example in FIG. 1. Note that the fixing member 117 is not limited to a screw.
  • the cutting tool 101 includes a holder 1, but is not limited to this form.
  • the cutting tool may be a 101A including a holder 1A.
  • the machined product 201 may be produced by cutting the workpiece 203.
  • a manufacturing method of the machined product 201 may include the following steps. (1) rotating a cutting tool 101, such as that represented by the non-limiting embodiment described above; (2) contacting a rotating cutting tool 101 with a workpiece 203; (3) removing the cutting tool 101 from the workpiece 203;
  • the present invention may also include:
  • the cutting tool 101 may be rotated around the rotation axis O1 and brought relatively close to the workpiece 203.
  • the cutting edge 105 of the insert 103 in the cutting tool 101 may be brought into contact with the workpiece 203 to cut the workpiece 203.
  • the cutting tool 101 may be moved in a direction relatively away from the workpiece 203.
  • step (1) the workpiece 203 may be brought closer to the cutting tool 101. Also, in step (3), the workpiece 203 may be moved away from the cutting tool 101. If cutting is to be continued, the cutting tool 101 may be kept rotating and the step of bringing the cutting tool 101 into contact with different locations of the workpiece 203 may be repeated.
  • Examples of the material of the workpiece 203 include aluminum alloys, carbon steel, alloy steel, stainless steel, cast iron, and non-ferrous metals.
  • a cutting tool 101 equipped with a holder 1 is used, but the present invention is not limited to this form.
  • a cutting tool 101A equipped with a holder 1A may be used.
  • the first flow path 13 opens in the first pocket 21, and the second flow path 15 opens in the second pocket 23, but the first flow path 13 and the second flow path 15 are not limited to opening in the pocket 9.
  • the first flow path 13 and/or the second flow path 15 may open in an area of the outer circumferential surface 7 other than the pocket 9, for example.
  • the manufacturing method of the holder 1, 1A, the cutting tool 101, 101A, and the machined product 201 may be configured as follows.
  • the holder has a cylindrical main body extending from a first end to a second end along a rotation axis, the main body having an end face located on the side of the first end, an outer circumferential surface, a plurality of pockets opening to the end face and the outer circumferential surface, and a flow path through which a coolant flows, the flow path having a first flow path having a linear shape extending toward the outer circumferential surface, and a second flow path having a linear shape extending from the first flow path toward the outer circumferential surface, the flow path having a protrusion located at a connection portion between the first flow path and the second flow path and protruding from the second flow path toward a central axis of the first flow path.
  • the protrusion may be located outside the connection portion in a cross section including the central axis of the first flow path and the central axis of the second flow path.
  • the pocket may have a first pocket and a second pocket, the first flow path may open in the first pocket, and the second flow path may open in the second pocket.
  • the cutting tool may include a holder according to any one of (1) to (4) above, and a plurality of cutting inserts positioned in the plurality of pockets.
  • the pocket has a first pocket and a second pocket
  • the first flow path opens in the first pocket and the second flow path opens in the second pocket
  • the cutting insert comprises a first cutting insert positioned in the first pocket and a second cutting insert positioned in the second pocket
  • the first flow path extends toward a side of the first cutting insert opposite the body
  • the second flow path extends toward a cutting edge of the second cutting insert.
  • a method for manufacturing a machined product can include the steps of rotating the cutting tool described above in (5) or (6), bringing the rotating cutting tool into contact with a workpiece, and removing the cutting tool from the workpiece.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
PCT/JP2024/002153 2023-03-20 2024-01-25 ホルダ、切削工具及び切削加工物の製造方法 Ceased WO2024195286A1 (ja)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0717401U (ja) * 1993-09-06 1995-03-28 三菱マテリアル株式会社 切削工具
JPH0839387A (ja) * 1994-07-29 1996-02-13 Mitsubishi Materials Corp スローアウェイチップおよびこれを用いたフライスカッタ
JP2003053621A (ja) * 2001-06-28 2003-02-26 Camozzi Holding Spa 流体冷却された硬質材料のインサートを有する高速度回転ツール
CN103737091A (zh) * 2013-12-30 2014-04-23 株洲钻石切削刀具股份有限公司 具有冷却结构的切削刀具
WO2016121870A1 (ja) * 2015-01-29 2016-08-04 京セラ株式会社 切削工具及び切削加工物の製造方法
JP2018534158A (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 溝穴フライス加工ディスク、溝穴フライス加工ディスクを含む溝穴フライス工具、および溝穴フライス加工ディスク用のディスク
JP2021098242A (ja) * 2019-12-20 2021-07-01 三菱マテリアル株式会社 クーラント穴付きカッターおよびそのカッター本体

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0717401U (ja) * 1993-09-06 1995-03-28 三菱マテリアル株式会社 切削工具
JPH0839387A (ja) * 1994-07-29 1996-02-13 Mitsubishi Materials Corp スローアウェイチップおよびこれを用いたフライスカッタ
JP2003053621A (ja) * 2001-06-28 2003-02-26 Camozzi Holding Spa 流体冷却された硬質材料のインサートを有する高速度回転ツール
CN103737091A (zh) * 2013-12-30 2014-04-23 株洲钻石切削刀具股份有限公司 具有冷却结构的切削刀具
WO2016121870A1 (ja) * 2015-01-29 2016-08-04 京セラ株式会社 切削工具及び切削加工物の製造方法
JP2018534158A (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 溝穴フライス加工ディスク、溝穴フライス加工ディスクを含む溝穴フライス工具、および溝穴フライス加工ディスク用のディスク
JP2021098242A (ja) * 2019-12-20 2021-07-01 三菱マテリアル株式会社 クーラント穴付きカッターおよびそのカッター本体

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DE112024001320T5 (de) 2025-12-31

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