[go: up one dir, main page]

WO2010086988A1 - Foret isocèle - Google Patents

Foret isocèle Download PDF

Info

Publication number
WO2010086988A1
WO2010086988A1 PCT/JP2009/051509 JP2009051509W WO2010086988A1 WO 2010086988 A1 WO2010086988 A1 WO 2010086988A1 JP 2009051509 W JP2009051509 W JP 2009051509W WO 2010086988 A1 WO2010086988 A1 WO 2010086988A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting edge
angle
drill
double
diameter
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/JP2009/051509
Other languages
English (en)
Japanese (ja)
Inventor
義寛 滝川
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.)
OSG Corp
Original Assignee
OSG 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 OSG Corp filed Critical OSG Corp
Priority to PCT/JP2009/051509 priority Critical patent/WO2010086988A1/fr
Publication of WO2010086988A1 publication Critical patent/WO2010086988A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/02—Twist drills
    • 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
    • B23B2226/27—Composites
    • 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
    • B23B2226/27—Composites
    • B23B2226/275—Carbon fibre reinforced carbon composites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/04—Angles, e.g. cutting angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/18—Configuration of the drill point

Definitions

  • the present invention relates to a double-angle drill having a two-pointed tip angle, and particularly to a technique for obtaining an excellent tool life even for difficult-to-cut materials such as FRP (fiber reinforced plastic).
  • FRP fiber reinforced plastic
  • a first cutting edge is provided at the tool tip with a predetermined first tip angle ⁇ 1, and a second cutting edge is continuously formed on the outer peripheral side of the first cutting edge with a second tip angle ⁇ 2 smaller than the first tip angle ⁇ 1.
  • a double-angle drill provided with a blade is known (see Patent Documents 1 and 2). In such a double angle drill, the second cutting edge is provided on the outer peripheral portion, so that the hole quality is improved, for example, the generation of burrs is suppressed.
  • JP 2001-328016 A Utility Model Registration No. 2602032
  • the present invention has been made against the background of the above circumstances, and its object is to provide an excellent tool life even for difficult-to-cut materials such as FRP.
  • a first cutting edge is provided at a predetermined first tip angle ⁇ 1 at a tool tip, and the first tip angle is continuously provided on an outer peripheral side of the first cutting edge.
  • the radial rake ⁇ of the leading edge provided continuously at the outer end portion of the second cutting edge is 18 ° to 38. It is within the range of °.
  • the 2nd invention is the double angle drill of 1st invention,
  • the 1st cutting edge diameter D1 which is a diameter of the outer end part of the said 1st cutting edge is a drill diameter which is a diameter of the outer end part of the said 2nd cutting edge It is characterized by being 70% or more of Dd and 0.3 mm or more smaller than the drill diameter Dd.
  • the third invention is characterized in that, in the double angle drill of the first invention or the second invention, the second tip angle ⁇ 2 is in the range of 10 ° to 40 °.
  • the fourth invention is characterized in that, in the double angle drill according to any one of the first invention to the third invention, an outer clearance angle of the second cutting edge is 10 ° or more.
  • a fifth invention is the double-angle drill according to any one of the first to fourth inventions, wherein at least the first cutting edge and the second cutting edge are made of cemented carbide or a high-hardness sintered body. It is characterized by that.
  • the sixth invention is characterized in that, in the double angle drill of the fifth invention, the entire drill including the first cutting edge and the second cutting edge is made of a cemented carbide, and the surface thereof is coated with a diamond film.
  • the leading edge radial rake ⁇ is in the range of 18 ° to 38 °, which is sufficiently larger than that of conventional drills (usually about 10 ° or less). Finishing by burnishing or cutting is performed by the edge, and hole diameter accuracy defects are suppressed regardless of wear of the second cutting edge. Further, by increasing the radial rake ⁇ of the leading edge, the rake angle of the second cutting edge is also increased, so that the sharpness of the second cutting edge is improved and a further excellent hole quality can be obtained. As a result, even in the drilling of difficult-to-cut materials such as FRP, a further excellent hole quality is obtained and the tool life is improved.
  • the first cutting edge diameter D1 is 70% or more of the drill diameter Dd and within a range smaller than the drill diameter Dd by 0.3 mm or more, that is, within a range of 0.7Dd ⁇ D1 ⁇ Dd ⁇ 0.3 mm.
  • the second tip angle ⁇ 2 is in the range of 10 ° to 40 °, any of the above-mentioned effects of improving the hole quality such as prevention of burrs by providing the second cutting edge. Is obtained appropriately.
  • the outer clearance angle of the second cutting edge is 10 ° or more, the wear of the second cutting edge is suppressed, and the radial rake ⁇ of the leading edge is within the range of 18 ° to 38 °. Combined with the fact that the burnishing or cutting action is obtained, the hole diameter accuracy defect is more effectively suppressed and the tool life is improved.
  • Double angle drill 18a First cutting edge 18b: Second cutting edge 28: Leading edge ⁇ 1: First tip angle ⁇ 2: Second tip angle Dd: Drill diameter D1: First cutting edge diameter ⁇ : Radial rake
  • the double angle drill of the present invention is suitably applied to a twist drill having a twist groove that is twisted around an axis and in which the first and second cutting edges are provided in a portion where the twist groove opens at the tip of the tool.
  • a twist drill having a twist groove that is twisted around an axis and in which the first and second cutting edges are provided in a portion where the twist groove opens at the tip of the tool.
  • it can also be applied to a straight blade drill having a straight groove parallel to the axis.
  • the drill of 2 blades provided with a pair of 1st cutting blade and 2nd cutting blade symmetrically with respect to an axial center, it can be applied also to a drill of 3 blades or more.
  • the radial rake ⁇ of the leading edge is less than 18 °, a sufficient life improvement effect cannot be obtained compared to the conventional drill, and if it is greater than 38 °, chipping tends to occur and the tool life is reduced. , Within a range of 18 ° to 38 °. A range of 25 ° to 34 ° is particularly desirable.
  • the double-angle drill of the present invention can provide an excellent life improvement effect in drilling processing for FRP such as CFRP (carbon fiber reinforced plastic), but drills for non-ferrous light metals such as silicon-containing aluminum castings with remarkable cutting edge wear.
  • FRP such as CFRP (carbon fiber reinforced plastic)
  • drills for non-ferrous light metals such as silicon-containing aluminum castings with remarkable cutting edge wear.
  • the same effect of improving the life can be obtained in the processing.
  • it can also be used for drilling for other work materials such as steel materials.
  • the first cutting edge diameter D1 is preferably within the range of 0.7Dd ⁇ D1 ⁇ Dd ⁇ 0.3 mm, but it is also possible to set the first cutting edge diameter D1 outside this range.
  • the second tip angle ⁇ 2 is preferably within a range of 10 ° to 40 °, but it is also possible to set the second tip angle ⁇ 2 outside this range.
  • the first tip angle ⁇ 1 is appropriately determined within a range of about 80 ° to 150 °, for example, as in a normal drill, but is preferably within a range of about 110 ° to 130 °.
  • the outer peripheral clearance angle of the second cutting edge In order to suppress wear of the second cutting edge, it is desirable to set the outer peripheral clearance angle of the second cutting edge to 10 ° or more.
  • the upper limit is to prevent chipping or to reduce the processing cost of flank machining. In this case, about 22 ° or less is appropriate.
  • a cemented carbide or a high-hardness sintered body is preferably employed, but other hard tool materials such as high-speed tool steel can also be employed.
  • a cemented carbide is used as the tool base material, it is desirable to coat the surface with a diamond coating.
  • a high-hardness sintered body for example, a high-pressure sintered body of polycrystalline diamond (PCD) is preferably used, but it is also possible to use a high-pressure sintered body of single-crystal diamond, polycrystalline CBN, or single-crystal CBN. . It is also possible to construct only the first cutting edge and the second cutting edge portion from a high-hardness sintered body and integrally fix the tool main body such as cemented carbide by brazing or the like.
  • the double-angle drill of the present invention is preferably a double margin drill having a margin of approximately the same diameter as the drill diameter Dd on both the leading edge side and the heel side, but at least if a margin is provided on the leading edge side. good. Since the radial rake ⁇ of the leading edge is relatively large and finishing is performed, a back taper that gradually decreases the diameter size toward the shank side is not always necessary, but the back taper may be applied to the entire region or from the middle as necessary. Can also be provided.
  • FIG. 1A and 1B are diagrams showing a double angle drill 10 according to an embodiment of the present invention, in which FIG. c) is a front end view of (b) viewed from the front end side, and (d) is an enlarged view of the ID-ID cross section in (a).
  • This double-angle drill 10 is a two-blade twist drill, and is provided with a cylindrical shank 12 and a body 14 which are coaxially integrated. 16 is formed symmetrically with respect to the axis O.
  • a pair of cutting edges 18 are provided symmetrically at the tip of the body 14 along the opening edge of the torsion groove 16 and are rotated clockwise around the axis O as viewed from the shank 12 side. A hole is cut by these cutting edges 18, and chips are discharged to the shank 12 side through the twisted groove 16.
  • the double-angle drill 10 is made of a cemented carbide, and the body 14 is coated with a diamond film with a film thickness of 12 ⁇ m to 20 ⁇ m.
  • the twist angle of the twist groove 16 is about 12 ° in this embodiment.
  • FIG. 1 is not necessarily shown with exact dimensional ratios or angles.
  • the cutting edge 18 includes a first cutting edge 18a provided on a conical surface having a first tip angle ⁇ 1, and a second cutting edge 18b provided continuously on the outer peripheral side of the first cutting edge 18a.
  • the second cutting edge 18b is provided on a conical surface having a second tip angle ⁇ 2 smaller than the first tip angle ⁇ 1.
  • the first tip angle ⁇ 1 is in the range of 110 ° to 130 ° and about 120 ° in the present embodiment
  • the second tip angle ⁇ 2 is in the range of 10 ° to 40 ° and is about 20 ° in the present embodiment.
  • the first cutting edge diameter D1, which is the diameter of the outer end portion of the first cutting edge 18a, is 0.7Dd ⁇ D1 ⁇ Dd-0.
  • Dd which is the diameter of the outer end portion of the second cutting edge 18b.
  • Dd is the diameter of the outer end portion of the second cutting edge 18b.
  • the second cutting edge 18b is formed by processing the flank face in the circumferential direction, and the flank clearance angle in a cross section perpendicular to the axis O of the flank face 20 is 10 ° or more, which is about approximately in this embodiment. 14 °.
  • a thinning 22 is provided at the tip of the drill, and a thinning blade 24 reaching the vicinity of the axis O is formed continuously with the first cutting edge 18a.
  • the margins 32, 34 having a diameter dimension substantially equal to the drill diameter Dd on the leading edge 28 side and the heel 30 side of the pair of lands 26 divided by the twist groove 16, respectively.
  • the margin 34 on the heel 30 side is provided with a chamfer 36.
  • the leading edge 28 is continuously provided at the outer end of the second cutting edge 18b, and its radial rake (the rake angle of the cross section perpendicular to the axis O) ⁇ is in the range of 18 ° to 38 °. In this embodiment, it is about 28 °.
  • the cross-sectional shape of the torsion groove 16 is set so as to obtain such a radial rake ⁇ , and the rake angle of the second cutting edge 18b provided continuously to the leading edge 28 also corresponds to the radial rake ⁇ . It becomes the size. Note that the back taper whose diameter is reduced toward the shank 12 is substantially zero in this embodiment, and the diameter of the leading edge 28 is substantially the same as the drill diameter Dd over the entire length.
  • the radial rake ⁇ of the leading edge 28 is within a range of 18 ° to 38 °, which is sufficiently larger than the radial rake of a conventional drill (usually about 10 ° or less).
  • the leading edge 28 finishing by burnishing or cutting is performed, and hole diameter accuracy failure (reduction of hole diameter) is suppressed regardless of wear of the second cutting edge 18b.
  • the rake angle of the second cutting edge 18b is increased by increasing the radial rake ⁇ of the leading edge 28, the sharpness of the second cutting edge 18b is improved, and a further excellent hole quality can be obtained. become. As a result, even in the drilling of difficult-to-cut materials such as FRP, a further excellent hole quality is obtained and the tool life is improved.
  • the first cutting edge diameter D1 is in the range of 0.7Dd ⁇ D1 ⁇ Dd ⁇ 0.3 mm
  • the second tip angle ⁇ 2 is in the range of 10 ° to 40 °.
  • the outer peripheral clearance angle of the second cutting edge 18b is 10 ° or more, the wear of the second cutting edge 18b is suppressed, and the radial rake ⁇ of the leading edge 28 is 18 ° to 38 °. Combined with being within the range and obtaining the burnishing or cutting action, the hole diameter accuracy defect is more effectively suppressed, and the tool life is improved.
  • the outer clearance angle of the second cutting edge 18b is 8 respectively.
  • a total of 18 kinds of test products with angles of 14 °, 20 °, and 14 ° were prepared, and the tool life was examined by drilling under the following processing conditions. The result shown in FIG. 2 was obtained.
  • the product of the present invention having a radial rake ⁇ of 20 ° to 36 ° causes wear on the second cutting edge 18b in the same manner as the conventional product having a radial rake ⁇ of 10 °, but is burned or cut by the leading edge 28.
  • the hole diameter accuracy defect reduction of the hole diameter
  • the number of processed holes is increased accordingly, and the tool life is improved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)

Abstract

L'invention porte sur un foret isocèle (10) qui possède un double point d'origine, l'angle de coupe latéral ? d'un bord d'attaque du profil (28) étant compris entre 18 et 38°C tout en étant suffisamment élevé par comparaison avec l'angle de coupe latéral d'un foret traditionnel (normalement 10° ou moins), ce qui permet au bord d'attaque (28) d'exécuter un traitement de finition, d'un brunissage à un découpage, avec limitation d'une mauvaise précision de diamètre de l'alésage, indépendamment de l'usure d'une deuxième arête tranchante (18b). Étant donné que l'angle de coupe de la deuxième arête tranchante (18) devient élevé du fait de l'augmentation de l'angle de coupe latéral ? du bord d'attaque (28), l'efficacité de coupe de la deuxième arête tranchante (18b) est améliorée et une excellente qualité de l'alésage traité peut être obtenue. Par conséquent, une excellente qualité de l'alésage traité est obtenue, même dans le cas du forage d'un trou dans un matériau difficile à couper, tel que du plastique renforcé par des fibres, la durée de vie d'un outil étant améliorée.
PCT/JP2009/051509 2009-01-29 2009-01-29 Foret isocèle Ceased WO2010086988A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/051509 WO2010086988A1 (fr) 2009-01-29 2009-01-29 Foret isocèle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/051509 WO2010086988A1 (fr) 2009-01-29 2009-01-29 Foret isocèle

Publications (1)

Publication Number Publication Date
WO2010086988A1 true WO2010086988A1 (fr) 2010-08-05

Family

ID=42395258

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/051509 Ceased WO2010086988A1 (fr) 2009-01-29 2009-01-29 Foret isocèle

Country Status (1)

Country Link
WO (1) WO2010086988A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012213848A (ja) * 2011-03-30 2012-11-08 Fuji Heavy Ind Ltd 切削工具
CN104028812A (zh) * 2014-06-16 2014-09-10 同济大学 碳纤维复合材料专用钻头
JP2015142950A (ja) * 2014-01-31 2015-08-06 旭ダイヤモンド工業株式会社 ドリル
EP2946861A1 (fr) * 2014-05-22 2015-11-25 Fuji Jukogyo Kabushiki Kaisha Foret et procédé de fabrication d'un foret
EP2659998A4 (fr) * 2010-12-28 2016-12-28 Toyota Motor Co Ltd Foret
EP3175943A4 (fr) * 2014-07-29 2018-03-14 KYOCERA Corporation Foret et procédé de fabrication d'un produit de coupe l'utilisant
US20220241873A1 (en) * 2019-06-26 2022-08-04 Bic Tool Co., Ltd. Drill for carbon-fiber composite material
DE112021002713T5 (de) 2020-05-11 2023-02-23 Kyocera Corporation Bohrer und verfahren zur herstellung eines maschinell bearbeiteten produkts
EP4414110A1 (fr) * 2023-02-13 2024-08-14 AB Sandvik Coromant Perceuse

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63306812A (ja) * 1987-06-05 1988-12-14 Fuji Heavy Ind Ltd 複合材穿孔用ドリル
JPH02126710U (fr) * 1989-03-24 1990-10-18
JPH0675612U (ja) * 1993-04-06 1994-10-25 富士重工業株式会社 ダブルアングルドリル
JP2001328016A (ja) * 2000-05-19 2001-11-27 Hitachi Tool Engineering Ltd ツイスト用ドリル
JP2007260843A (ja) * 2006-03-29 2007-10-11 Mitsubishi Materials Corp ドリル
JP2008036759A (ja) * 2006-08-04 2008-02-21 Fuji Heavy Ind Ltd ドリル

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63306812A (ja) * 1987-06-05 1988-12-14 Fuji Heavy Ind Ltd 複合材穿孔用ドリル
JPH02126710U (fr) * 1989-03-24 1990-10-18
JPH0675612U (ja) * 1993-04-06 1994-10-25 富士重工業株式会社 ダブルアングルドリル
JP2001328016A (ja) * 2000-05-19 2001-11-27 Hitachi Tool Engineering Ltd ツイスト用ドリル
JP2007260843A (ja) * 2006-03-29 2007-10-11 Mitsubishi Materials Corp ドリル
JP2008036759A (ja) * 2006-08-04 2008-02-21 Fuji Heavy Ind Ltd ドリル

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2659998A4 (fr) * 2010-12-28 2016-12-28 Toyota Motor Co Ltd Foret
US9656328B2 (en) 2011-03-30 2017-05-23 Fuji Jukogyo Kabushiki Kaisha Cutting tool
EP2505287B1 (fr) * 2011-03-30 2021-04-21 Subaru Corporation Outil de coupe
JP2012213848A (ja) * 2011-03-30 2012-11-08 Fuji Heavy Ind Ltd 切削工具
JP2015142950A (ja) * 2014-01-31 2015-08-06 旭ダイヤモンド工業株式会社 ドリル
EP2946861A1 (fr) * 2014-05-22 2015-11-25 Fuji Jukogyo Kabushiki Kaisha Foret et procédé de fabrication d'un foret
US9827617B2 (en) 2014-05-22 2017-11-28 Subaru Corporation Drill and method of manufacturing drill
CN104028812A (zh) * 2014-06-16 2014-09-10 同济大学 碳纤维复合材料专用钻头
EP3175943A4 (fr) * 2014-07-29 2018-03-14 KYOCERA Corporation Foret et procédé de fabrication d'un produit de coupe l'utilisant
US10259050B2 (en) 2014-07-29 2019-04-16 Kyocera Corporation Drill and method of manufacturing machined product using the same
US20220241873A1 (en) * 2019-06-26 2022-08-04 Bic Tool Co., Ltd. Drill for carbon-fiber composite material
US12285810B2 (en) * 2019-06-26 2025-04-29 Bic Tool Co., Ltd. Drill for carbon-fiber composite material
DE112021002713T5 (de) 2020-05-11 2023-02-23 Kyocera Corporation Bohrer und verfahren zur herstellung eines maschinell bearbeiteten produkts
EP4414110A1 (fr) * 2023-02-13 2024-08-14 AB Sandvik Coromant Perceuse
WO2024170402A1 (fr) * 2023-02-13 2024-08-22 Ab Sandvik Coromant Foret

Similar Documents

Publication Publication Date Title
KR102399372B1 (ko) 드릴
WO2010086988A1 (fr) Foret isocèle
US9511424B2 (en) Drill
EP1926567B2 (fr) Foret hélicoïdal
EP2286945B1 (fr) Foret hélicoïdal
US9492877B2 (en) Drill
EP2698219A1 (fr) Foret
JPWO2010038279A1 (ja) ドリル
CN106132607B (zh) 带聚晶金刚石烧结体的旋转切削工具
WO2011049095A1 (fr) Foret pour matériau composite ainsi que procédé d'usinage utilisant ce foret et appareil d'usinage utilisant ce foret
US20020044843A1 (en) Hole forming tool
JP2011073129A (ja) 穴あけ用ドリル
WO2014206716A1 (fr) Foret hélicoïdal pour usinage du métal
GB2417447A (en) A twist drill bit
JP5258677B2 (ja) トリプルアングルドリル
EP3812069B1 (fr) Fraise conique
JP6212863B2 (ja) ラジアスエンドミル
JP2007007809A (ja) 低加工硬化超硬ドリル
WO2012053090A1 (fr) Foret à trois lames
JP4053295B2 (ja) 穴明け工具
JP2008142834A (ja) ドリル
JP6127341B2 (ja) ３枚刃ツイストドリル
JP2005205526A (ja) 深穴用穴明け工具
JP2002028810A (ja) 小型ドリル
JP2007007808A (ja) 低加工硬化超硬ドリル

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09839180

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 09839180

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP