WO2023277180A1 - 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
WO2023277180A1
WO2023277180A1 PCT/JP2022/026463 JP2022026463W WO2023277180A1 WO 2023277180 A1 WO2023277180 A1 WO 2023277180A1 JP 2022026463 W JP2022026463 W JP 2022026463W WO 2023277180 A1 WO2023277180 A1 WO 2023277180A1
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WO
WIPO (PCT)
Prior art keywords
holder
slit
rear end
central axis
cutting tool
Prior art date
Application number
PCT/JP2022/026463
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English (en)
French (fr)
Japanese (ja)
Inventor
洋介 福原
えり 山口
Original Assignee
京セラ株式会社
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 京セラ株式会社 filed Critical 京セラ株式会社
Priority to CN202280041342.0A priority Critical patent/CN117500625A/zh
Priority to JP2023532088A priority patent/JPWO2023277180A1/ja
Publication of WO2023277180A1 publication Critical patent/WO2023277180A1/ja

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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
    • B23B27/04—Cutting-off tools
    • 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
    • B23B27/16—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped

Definitions

  • the present disclosure relates to a holder in a cutting tool used for cutting work material.
  • Cutting includes, for example, grooving and parting off.
  • Examples of cutting tools used for cutting work materials include the cutting tools described in Patent Documents 1 and 2.
  • the holders of the cutting tools described in Patent Documents 1 and 2 each have a pocket into which the cutting insert is inserted and a slit extending rearward from the pocket.
  • the slit described in Patent Literature 1 is inclined upward with distance from the pocket.
  • the slit described in Patent Literature 2 is inclined downward with increasing distance from the pocket.
  • a non-limiting one-sided holder of the present disclosure is a holder for a cutting tool that has a bar shape extending from a rear end toward a front end along a central axis, and includes a head positioned on the side of the front end, and and a shank located on the side of said trailing end.
  • the head has an upper jaw, a lower jaw, and a pocket located between the upper jaw and the lower jaw and into which a cutting insert can be inserted.
  • the lower jaw has a restraining surface with which the end surface of the cutting insert on the rear end side can abut.
  • the holder further has a slit extending from the restraining surface toward the rear end.
  • the slit is connected to the upper end of the restraining surface and has an ascending portion that slopes upward toward the rear end; a descending portion sloping downward toward the end.
  • the descending portion is longer than the ascending portion in the direction along the central axis.
  • FIG. 1 is a perspective view of a non-limiting embodiment cutting tool
  • FIG. 2 is an enlarged view of an area A1 shown in FIG. 1
  • FIG. FIG. 2 is a plan view of the cutting tool shown in FIG. 1 as seen from the tip side; It is the side view which looked at the cutting tool shown in FIG. 3 from B1 direction. It is the side view which looked at the cutting tool shown in FIG. 3 from B2 direction.
  • 6 is an enlarged view of an area A2 shown in FIG. 5
  • FIG. FIG. 2 is a perspective view showing a holder in the cutting tool shown in FIG. 1
  • 2 is an enlarged view of an area A3 shown in FIG. 1
  • FIG. FIG. 2 is a plan view of the holder shown in FIG.
  • FIG. 1 is a schematic diagram illustrating a step in a non-limiting embodiment of a method for manufacturing a machined workpiece;
  • FIG. 1 is a schematic diagram illustrating a step in a non-limiting embodiment of a method for manufacturing a machined workpiece;
  • FIG. 1 is a schematic diagram illustrating a step in a non-limiting embodiment of a method for manufacturing a machined workpiece;
  • FIG. 1 is a schematic diagram illustrating a step in a non-limiting embodiment of a method for manufacturing a machined workpiece;
  • FIG. 1 is a schematic diagram illustrating a step in a non-limiting embodiment of a method for manufacturing a machined workpiece;
  • FIG. 1 is a schematic diagram illustrating a step in a non-limiting embodiment of a method for manufacturing a machined workpiece;
  • FIG. 1 is a schematic diagram illustrating a step in a non-limiting embodiment of a method for manufacturing a machined workpiece;
  • Cutting tools 101 include, for example, turning tools and milling tools.
  • Turning tools include, for example, grooving tools and parting off tools.
  • the cutting tool 101 in one non-limiting example shown in FIG. 1 is a parting off tool.
  • the cutting tool 101 may comprise any components not shown in the referenced figures.
  • the dimensions of the members in each drawing do not necessarily represent the actual dimensions of the constituent members, the dimensional ratios of the respective members, and the like faithfully.
  • the cutting tool 101 may have a holder 201 and a cutting insert 301 (hereinafter simply referred to as "insert").
  • the holder 201 and the insert 301 are members separate from each other, and the holder 201 is a member for holding the insert 301 .
  • the worn insert 301 may be removed from the holder 201 and another insert 301 may be attached to the holder 201 . By replacing the insert 301, it is possible to continue cutting the work material.
  • the holder 201 has a rod shape extending from the first end 201a toward the second end 201b along the central axis O1.
  • the holder 201 may be square prism shaped.
  • the first end 201a may be referred to as the "leading edge” and the second end 201b may be referred to as the "trailing edge.”
  • the lower left end of the holder 201 may be the front end 201a, and the upper right end may be the rear end 201b.
  • the left end of the holder 201 may be the leading end 201a and the right end may be the trailing end 201b.
  • the holder 201 may have a head 1 and a shank 3.
  • the head 1 may be positioned on the tip 201 a side of the holder 201 .
  • the head 1 may include an end face on the side of the tip 201a, as in a non-limiting example shown in FIG.
  • the shank 3 may be located closer to the rear end 201b than the head 1 is.
  • the shank 3 may include an end face on the side of the rear end 201b, as in one non-limiting example shown in FIG.
  • the shank 3 may be positioned closer to the rear end 201b than the head 1.
  • the shank 3 may include a central portion of the holder 201 in a direction along the central axis O1, as a non-limiting example shown in FIG.
  • the shank 3 may be a part that is gripped by the machine tool when attaching the cutting tool 101 to the machine tool.
  • the head 1 may be a part for gripping the insert 301 .
  • the head 1 may have a pair of jaws (upper jaw 5 and lower jaw 7) facing each other.
  • the shank 3 is a part that can be gripped by a machine tool and generally has a simple cylindrical or prismatic shape. Therefore, the central axis of the shank 3 may be regarded as the central axis O1 of the holder 201. As shown in FIG.
  • the head 1 may have an upper jaw 5, a lower jaw 7 and a pocket 9.
  • the direction from the lower jaw 7 to the upper jaw 5 is set as "upward” and the direction from the upper jaw 5 to the lower jaw 7 is set as “downward” according to the positional relationship of the upper jaw 5 and the lower jaw 7 facing each other. good too.
  • Pocket 9 may be the space located between upper jaw 5 and lower jaw 7 .
  • An insert 301 can be inserted into the pocket 9 .
  • the insert 301 may be fixed to the holder 201 by holding the insert 301 between the upper jaw 5 and the lower jaw 7 .
  • the lower jaw 7 may have a restraining surface 11.
  • the restraining surface 11 may be capable of contacting the end surface of the cutting insert 301 on the rear end side. Since the insert 301 can be inserted into the pocket 9 , the restraining surface 11 may be evaluated as being located at the rear end of the pocket 9 .
  • the constraining surface 11 is not limited to a specific shape.
  • the restraint surface 11 may have, for example, a convex curved surface shape, or may have a planar shape as in a non-limiting example shown in FIG. 8 and the like.
  • the constraining surface 11 tends to surface-contact the insert 301 . Therefore, the insert 301 can be stably positioned on the restraint surface 11 .
  • the holder 201 may further have a slit 13.
  • the slit 13 may extend from the restraining surface 11 toward the rear end 201b of the holder 201. As shown in FIG.
  • the holder 201 has the slit 13 , the distance between the upper jaw 5 and the lower jaw 7 of the head 1 can be changed by deforming the head 1 . Therefore, it is possible to easily attach and detach the insert 301 to and from the pocket 9 .
  • the slit 13 may be located only within the head 1 in the direction along the central axis O1, or may be located from the head 1 to the shank 3. If the slit 13 is positioned from the head 1 to the shank 3 as in the non-limiting example shown in FIG. Therefore, durability of the holder 201 can be enhanced.
  • the slit 13 may have a first portion 15 and a second portion 17.
  • the first portion 15 is a portion located on the tip side of the slit 13 and may be connected to the restraining surface 11 . As in a non-limiting example shown in FIG. 12 , the first portion 15 may be connected to the upper end of the restraining surface 11 when the opening of the slit 13 is positioned above the restraining surface 11 .
  • the first portion 15 may extend parallel to the central axis O1, or may be inclined upward toward the rear end 201b. At least when the first portion 15 is not inclined downward, the angle formed by the restricting surface 11 and the slit 13 is not acute. Therefore, the thickness of the portion sandwiched between the restricting surface 11 and the slit 13 in the lower jaw 7 is ensured, and the risk of chipping of this portion can be reduced.
  • the first portion 15 When the first portion 15 inclines upward toward the rear end 201b in this manner, the first portion 15 may also be referred to as a "rising portion". From the viewpoint of ensuring the thickness of the portion sandwiched between the restraining surface 11 and the slit 13 in the lower jaw 7, the angle ⁇ 1 formed by the restraining surface 11 and the first portion 15 may be an obtuse angle when viewed from the side. .
  • the second part 17 is a part located on the rear end side of the slit 13 and may be connected to the first part 15 .
  • the second portion 17 may slope downward toward the rear end 201b.
  • the second portion 17 may also be called a "descending portion".
  • the slit 13 has not only the first part 15 but also the second part 17, it is possible to avoid excessive reduction in thickness of the holder 201 between the slit 13 and the upper surface of the holder 201. Therefore, durability of the holder 201 can be enhanced. For example, if the slit 13 is positioned only within the head 1 in the direction along the central axis O1, excessive reduction in thickness of the head 1 between the slit 13 and the upper surface of the upper jaw 5 can be avoided. .
  • the second portion 17 may be longer than the first portion 15.
  • the thickness of the holder 201 between the slit 13 and the upper surface of the holder 201 can be prevented from becoming excessively small, and the length of the slit 13 can be easily secured. Therefore, it is possible to easily attach and detach the insert 301 to and from the pocket 9 while increasing the durability of the holder 201 .
  • the inclination angles of these portions are not limited to specific values.
  • the inclination angle ⁇ 1 of the ascending portion 15 with respect to the central axis O1 when viewed from the side may be set to 0.2° to 3°, for example.
  • the inclination angle ⁇ 2 of the descending portion 17 with respect to the central axis O1 when viewed from the side may be set to 6° to 10°, for example.
  • the tilt angle ⁇ 2 may be larger than the tilt angle ⁇ 1. Since the inclination angles .theta.1 and .theta.2 in FIG. 12 are small, FIG. 13 shows the slit 13 emphasizing these inclination angles .theta.1 and .theta.2.
  • this angle may be evaluated as the inclination angle ⁇ 1.
  • the maximum value of the inclination angle of the ascending portion 15 may be evaluated as the inclination angle ⁇ 1.
  • this angle may be evaluated as the inclination angle ⁇ 2.
  • the maximum value of the inclination angle of the descending portion 17 may be evaluated as the inclination angle ⁇ 2.
  • the ascending portion 15 extends linearly. In this case, the load applied to the ascending portion 15 due to the deformation of the head 1 tends to be distributed over a wide range. Further, when the inclination angle of the descending portion 17 is constant in a side view, it may be said that the descending portion 17 extends linearly. In this case, the load applied to the descending portion 17 due to deformation of the head 1 is likely to be distributed over a wide range.
  • the lower end of the descending portion 17 may be positioned above the lower end of the restraining surface 11 .
  • at least a part including the lower end of the restraining surface 11 becomes a region where the slit 13 does not exist rearward in the direction along the central axis O1. Therefore, the holder 201 can stably receive a cutting load, such as a thrust force, transmitted from the insert 301 to the restraint surface 11 .
  • the upper end of the slit 13 may be positioned within the head 1 when the slit 13 is positioned from the head 1 to the shank 3 in the direction along the central axis O1. In this case, excessive reduction in the wall thickness of the holder 201 between the slit 13 and the upper surface of the holder 201 can be further avoided, and the length of the slit 13 can be more easily secured.
  • the thickness of the holder 201 between the slit 13 and the upper surface of the holder 201 becomes excessively small. can be more easily avoided.
  • the descending portion 17 in the slit 13 may have a first area 19 and a second area 21 .
  • the first region 19 is a portion located on the tip side of the descending portion 17 and may be connected to the first portion 15 .
  • the second region 21 is located closer to the rear end 201 b than the first region 19 and may be connected to the first region 19 .
  • the inclination angle of the first region 19 with respect to the central axis O1 when viewed from the side is the inclination angle ⁇ 21.
  • the inclination angle of the second region 21 with respect to the central axis O1 when viewed from the side is the inclination angle ⁇ 22.
  • the tilt angle ⁇ 21 may be larger than the tilt angle ⁇ 22.
  • this angle When the tilt angle of the first region 19 is constant, this angle may be evaluated as the tilt angle ⁇ 21. Further, when the tilt angle of the first region 19 is not constant, the maximum value of the tilt angle of the first region 19 may be evaluated as the tilt angle ⁇ 21. Similarly, when the tilt angle of the second region 21 is constant, this angle may be evaluated as the tilt angle ⁇ 22. Moreover, when the inclination angle of the second region 21 is not constant, the maximum value of the inclination angle of the second region 21 may be evaluated as the inclination angle ⁇ 22.
  • the shank 3 may have an upper surface 23 and a lower surface 25. At this time, the entire slit 13 may be positioned closer to the upper surface 23 than to the lower surface 25 .
  • a cutting load due to a principal force is applied to the lower jaw 7 .
  • the durability of the holder 201 against the cutting load due to the principal force can be increased.
  • the size of the holder 201 is not particularly limited.
  • the length in the direction along the central axis O1 can be set to approximately 80 to 200 mm.
  • the height from the top end to the bottom end, in other words, the width in the vertical direction can be set to about 10 to 30 mm.
  • Steel, cast iron, or the like may be used as the member of the holder 201 .
  • the toughness of the holder 201 is high.
  • Insert 301 can be inserted into the pocket 9 of the holder 201 .
  • Insert 301 is not limited to any particular shape.
  • the insert 301 may have, for example, an upper side 27, a lower side 29, a pair of lateral sides 31, a leading side 33, a trailing side 35 and a cutting edge 37. As shown in FIG.
  • the upper side surface 27 is the upper surface of the insert 301 and may abut the upper jaw 5 .
  • the lower surface 29 is the lower lying surface of the insert 301 and may abut the lower jaw 7 .
  • the pair of lateral sides 31 may be surfaces located between the upper side 27 and the lower side 29 .
  • the upper side surface 27, the lower side surface 29, and the pair of lateral side surfaces 31 may each extend in a direction along the central axis O1.
  • the tip surface 33 is a surface located on the tip side of the insert 301, and may protrude toward the tip 201a of the cutting tool 101.
  • the rear end surface 35 is a surface located on the rear end side of the insert 301 and may come into contact with the restraining surface 11 of the holder 201 .
  • the cutting edge 37 may be located at the intersection of the upper surface 27 and the tip surface 33. Cutting can be performed by bringing this cutting edge 37 into contact with the material to be cut.
  • the cutting edge 37 may be located at the intersection of the upper surface 27 and the rear end surface 35 in addition to the locations described above.
  • the insert 301 is called a two-corner type insert 301 or a dogbone type insert 301, which is economical.
  • the size of the insert 301 is not particularly limited.
  • the length in the direction along the central axis O1 can be set to approximately 15 to 30 mm.
  • the height from the upper side surface 27 to the lower side surface 29, in other words, the width in the vertical direction can be set to about 3 to 10 mm.
  • Examples of materials for the insert 301 include cemented carbide and cermet.
  • Cemented carbide compositions may include, for example, WC-Co, WC-TiC-Co and WC-TiC-TaC-Co.
  • WC, TiC and TaC may be hard particles and Co may be the binder phase.
  • the cermet may be a sintered composite material in which a metal is combined with a ceramic component.
  • An example of a cermet may be a titanium compound based on titanium carbide (TiC) or titanium nitride (TiN).
  • TiC titanium carbide
  • TiN titanium nitride
  • the material of the insert 301 is not limited to the above composition.
  • the surface of insert 301 may be coated with a coating using chemical vapor deposition (CVD) or physical vapor deposition (PVD) methods.
  • Coating compositions may include titanium carbide (TiC), titanium nitride (TiN), titanium carbonitride (TiCN), alumina (Al 2 O 3 ), and the like.
  • the insert 301 may be secured to the holder 201 by screws 401 .
  • the upper jaw 5 of the holder 201 may be provided with a screw hole and the lower jaw 7 of the holder 201 may be provided with a screw groove.
  • the insert 301 may be attached to the pocket 9 by inserting the screw 401 into the screw hole of the upper jaw 5 and fixing the screw 401 in the thread groove.
  • the insert 301 may be attached to the pocket 9 by a so-called self-restraining method without using the screws 401 . For these cases it can also be said that the insert 301 is located in the pocket 9 .
  • the cutting work 503 is produced by cutting the work material 501 .
  • the manufacturing method of the cut workpiece 503 in the embodiment includes the following steps. i.e. (1) a step of rotating the work material 501; (2) a step of bringing the cutting tool 101 represented by the above embodiment into contact with the rotating work material 501; (3) separating the cutting tool 101 from the work material 501; Prepare.
  • the work material 501 may be rotated around the axis O2 and the cutting tool 101 may be brought relatively close to the work material 501.
  • the cutting tool 101 may come into contact with the work material 501 to cut the work material 501 .
  • the cutting tool 101 may be kept relatively away from the work material 501 .
  • the cutting tool 101 is brought closer to the work material 501 by moving the cutting tool 101 in the Y1 direction while the work material 501 is rotated while the axis O2 is fixed.
  • the cutting tool 101 moves in the Y2 direction while at least a portion of the cutting edge 37 of the insert 301 is in contact with the rotating work 501.
  • the work material 501 may be cut.
  • the cutting tool 101 may be moved away from the work material 501 by moving the cutting tool 101 in the Y3 direction while the work material 501 is rotating.
  • the cutting tool 101 is brought into contact with the work material 501 by moving the cutting tool 101, or the cutting tool 101 is separated from the work material 501, but it is of course not limited to such a form. .
  • step (1) the work material 501 may be brought closer to the cutting tool 101 .
  • step (3) the work material 501 may be kept away from the cutting tool 101 .
  • the process of keeping the workpiece 501 rotated and at least a part of the cutting edge 37 of the insert 301 contacting a different portion of the workpiece 501 may be repeated.
  • Representative examples of the material of the work material 501 include hardened steel, carbon steel, alloy steel, stainless steel, cast iron, non-ferrous metals, and the like.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
PCT/JP2022/026463 2021-07-01 2022-07-01 ホルダ、切削工具及び切削加工物の製造方法 WO2023277180A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202280041342.0A CN117500625A (zh) 2021-07-01 2022-07-01 支架、切削工具以及切削加工物的制造方法
JP2023532088A JPWO2023277180A1 (zh) 2021-07-01 2022-07-01

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-110208 2021-07-01
JP2021110208 2021-07-01

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WO2023277180A1 true WO2023277180A1 (ja) 2023-01-05

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CN (1) CN117500625A (zh)
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007529329A (ja) * 2004-03-18 2007-10-25 イスカーリミテッド 切削工具およびそのための切削用インサート
US20160175938A1 (en) * 2014-12-19 2016-06-23 Kennametal Inc. Tool holder for a cutting insert and process for manufacturing the tool holder
JP2018527208A (ja) * 2015-09-15 2018-09-20 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 溝入れ作業のための工具本体および旋削工具
JP2019209438A (ja) * 2018-06-05 2019-12-12 日本特殊陶業株式会社 バイト用ホルダ及びバイト

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007529329A (ja) * 2004-03-18 2007-10-25 イスカーリミテッド 切削工具およびそのための切削用インサート
US20160175938A1 (en) * 2014-12-19 2016-06-23 Kennametal Inc. Tool holder for a cutting insert and process for manufacturing the tool holder
JP2018527208A (ja) * 2015-09-15 2018-09-20 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 溝入れ作業のための工具本体および旋削工具
JP2019209438A (ja) * 2018-06-05 2019-12-12 日本特殊陶業株式会社 バイト用ホルダ及びバイト

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