WO2006109347A1 - ドリル - Google Patents
ドリル Download PDFInfo
- Publication number
- WO2006109347A1 WO2006109347A1 PCT/JP2005/006603 JP2005006603W WO2006109347A1 WO 2006109347 A1 WO2006109347 A1 WO 2006109347A1 JP 2005006603 W JP2005006603 W JP 2005006603W WO 2006109347 A1 WO2006109347 A1 WO 2006109347A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- drill
- cutting edge
- less
- thickness dimension
- range
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
- C23C30/005—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process on hard metal substrates
-
- 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
- B23B2224/00—Materials of tools or workpieces composed of a compound including a metal
- B23B2224/24—Titanium aluminium nitride
-
- 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
- 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
- B23B2228/105—Coatings with specified thickness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/24—Overall form of drilling tools
- B23B2251/241—Cross sections of the diameter of the drill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/44—Margins, i.e. the narrow portion of the land which is not cut away to provide clearance on the circumferential surface
- B23B2251/443—Double margin drills
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/909—Having peripherally spaced cutting edges
- Y10T408/9095—Having peripherally spaced cutting edges with axially extending relief channel
- Y10T408/9097—Spiral channel
Definitions
- the present invention relates to a drill, and more particularly to a drill capable of extending the tool life while ensuring wear resistance.
- a drill is a drilling tool for cutting a workpiece with a cutting edge formed at a tip portion.
- the surface of a drill is coated with a hard compound such as TiN, T1A1N, or TiCN. Such a coating hardens the surface of the drill, thereby improving wear resistance and extending the tool life.
- Japanese Patent Application Laid-Open No. 2003-251503 describes a technique for setting the film thickness dimension within a range of 0.05 m or more and 3.0 m or less. According to this technology, since the film thickness is set to 0.05 m or more, the wear resistance of the drill can be ensured. In addition, since the film thickness is set to 3.0 m or less, it is possible to prevent the cutting edge from being rounded and to prevent clogging of chips.
- Patent Document 1 Japanese Patent Laid-Open No. 2003-251503 (paragraph [0028], FIG. 1, etc.)
- the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a drill capable of extending the tool life while ensuring wear resistance. Means for solving the problem
- the drill according to claim 1 has a drill body that is rotated about its axis, and a spiral or substantially straight line on the outer peripheral surface portion toward the tip force shank of the drill body.
- a groove portion formed in a shape, a leading edge formed at a ridge line portion between a wall surface facing the rotation direction of the groove portion and the outer peripheral surface portion, and a cutting edge formed at a tip portion of the drill body, It is composed of a cemented carbide containing tungsten, and at least the cutting edge is composed of a surface coated with a hard compound, and the film thickness dimension of the hard compound is 0.
- the thickness of the core thickness that is set within the range of 1.0 m or less and is formed by the groove bottom of the groove is 0.15 D or more and 0.25 D with respect to the outer diameter D of the cutting edge. It is set within the following range.
- the drill according to claim 2 is the drill according to claim 1, wherein the average particle size of the tungsten carbide is set to 0.5 m or less.
- the surface of the cutting edge is formed by coating with a hard compound, and the film thickness dimension of the hard compound is 0.1 111 or more and 1. O / zm. It is set within the following range.
- the film thickness of the hard compound is smaller than 0.1 ⁇ m, the surface of the cutting edge cannot be sufficiently cured, and the wear resistance cannot be ensured.
- the film thickness of the hard compound is larger than 1.0 m, the cutting edge is rounded and the sharpness is lowered. As a result, the cutting performance of the chips deteriorates, resulting in poor hole accuracy due to chip clogging and breakage of the drill.
- the film thickness dimension of the hard compound within the range of not less than 0 and not more than 1.0 m, it is possible to secure wear resistance, prevent poor drilling accuracy, and prevent breakage of the drill. There is an effect that can be.
- the thickness dimension of the core thickness formed by the groove bottom of the groove portion is set in the range of 0.15D or more and 0.25D or less with respect to the outer diameter D of the cutting edge.
- the thickness of the heart thickness If the method is less than 0.15D, the strength of the drill will decrease and the drill will break.
- the thickness of the core thickness is larger than 0.25D, the groove portion becomes shallow, and chip evacuation performance decreases. As a result, chip welding is induced, causing deterioration of drilling hole accuracy and drill breakage. From the above, by setting the thickness of the core thickness within the range of 0.15D or more and 0.25D or less, it is possible to secure the drill strength, deteriorate the drilling hole accuracy, and prevent drill breakage. If you can, it has a positive effect.
- the chip discharge property can be synergistically improved.
- chip welding can be prevented and the life of the drill can be synergistically improved.
- the tungsten carbide constituting the drill has an average particle size set to 0.5 m or less. As a result, the hardness of the drill can be ensured and the life of the drill can be extended.
- a drill with an average particle size set to 0.5 ⁇ m or less ensures toughness compared to a drill with an average particle size set to more than 0.5 m. Thus, it is possible to prevent chipping.
- FIG. 1 is a front view of a drill according to an embodiment of the present invention.
- FIG. 2 is a front view of the drill.
- FIG. 1 is a front view of a drill 1 according to an embodiment of the present invention.
- the axial length of the shank 2 is not shown.
- the drill 1 is a small-diameter cutting tool that uses a rotational force transmitted from a processing machine (such as a drilling machine) to drill a hole in a stainless steel workpiece such as a shaft part, a nozzle part, or a medical part.
- a processing machine such as a drilling machine
- the shank 2 held by the processing machine and a drill body 3 for cutting a work are mainly provided.
- the drill 1 has a surface coated with TiAlN, which is a hard composite, and has a thickness dimensional force of TiA IN set within a range of 0 .: m to 1.0 m. Has been.
- the film thickness of T1A1N is less than 0.1 ⁇ m, the surface of drill 1 cannot be cured sufficiently and wear resistance cannot be ensured! /.
- the hard composite in the present embodiment is a force using TiAlN.
- the hard composite such as TiN, TiC, TiCn and the like is not necessarily limited thereto.
- the entire surface of the drill 1 is coated with a hard composite, but the surface of the cutting edge 5 is not necessarily limited to this, and it is sufficient that the surface of the drill 1 is coated.
- the outer diameter D of the cutting edge 5 is set to 3. Omm or less in order to perform a small-diameter drilling force. Therefore, when the drill 1 is coated with a hard compound, the cutting edge 5 is noticeably rounded by the coating and sharply decreases. From the above, as described above, setting the film thickness dimension of the hard compound to 1. O / zm or less results in deterioration of the drilling hole accuracy when the drill 1 in the present embodiment is used. This is very effective in preventing breakage of the drill 1.
- the shank 2 and the drill body 3 are integrally formed to form tungsten carbide (hereinafter referred to as WC).
- WC tungsten carbide
- the cemented carbide is press-sintered by adding cobalt as a binder to fine powder.
- the average particle size of WC is set to 0.5 m or less. As a result, the hardness of the drill 1 can be secured and the life of the drill 1 can be extended.
- the outer diameter D of the cutting edge 5 is 3.
- drill 1 with an average particle size set to 0.5 ⁇ m or less is tougher than a drill with an average particle size set to more than 0.5 m. Can be secured to prevent chipping.
- the shank 2 is a part held by the processing machine.
- the outer diameter dimension is set to be larger than the outer diameter D of the cutting edge 5, and the shaft O is substantially parallel to the shaft O. It is configured in a straight shape.
- the drill body 3 includes a groove portion 4 formed in a spiral shape on the outer peripheral surface portion thereof, a cutting edge 5 formed on a tip portion of the drill main body 3, a wall surface facing the rotation direction of the groove portion 4 and an outer peripheral surface portion. It consists mainly of a leading edge 6 formed at the ridgeline.
- the connecting portion between the drill body 3 and the shank 2 is configured to have a tapered shape that expands toward the shank 2 side (right side in FIG. 1).
- the groove 4 is a groove that is recessed in the outer peripheral surface of the drill body 3 in order to discharge chips.
- the leading edge 6 is disposed on the ridge line portion between the wall surface facing the rotation direction and the outer peripheral surface portion.
- the groove 4 in the present embodiment is formed in a spiral shape toward the tip side (left side in FIG. 1) force shank 2, but is not necessarily limited to this and is substantially parallel to the axis O. A straight line may be formed.
- the torsion angle which is an angle formed by the leading edge 6 and the straight line parallel to the axis O, is set within a range of 15 degrees or more and 35 degrees or less. As a result, both the rigidity of the drill main body 3 and the chip discharge performance can be achieved.
- the cutting edge 5 is for performing a drilling force of the workpiece by the rotational force of the processing machine.
- the drill body 3 is disposed at the tip portion.
- the tip angle of the cutting edge 5 is a force that is set to 120 degrees.
- the present invention is not limited to this. If it is set within a range of 110 degrees or more and 140 degrees or less, good. As a result, the strength and biting property of the cutting edge 5 can be secured, the hole accuracy can be secured, and the drill 1 can have a long life.
- the relief surface 7 is a surface that is escaped to reduce friction during cutting, and is connected to the rear of the cutting edge 5 in the rotation direction.
- FIG. 2 is a front end view of the drill 1.
- the margin 8 is for polishing the inner wall surface of the processing hole, and is continuously provided behind the cutting edge 5 in the rotation direction (clockwise in FIG. 2).
- the force composed of one margin 8 is not necessarily limited to this, and a second margin may be arranged behind the margin 8 in the rotation direction.
- the thickness X of the core thickness formed by the groove bottom of the groove 4 is within the range of 0.15D or more and 0.25D or less with respect to the outer diameter D of the cutting edge 5. Is set to Here, when the thickness X of the core thickness is smaller than 0.15D, the strength of the drill 1 is lowered and the drill 1 is easily broken.
- the thickness dimension X of the core thickness is larger than 0.25D, the groove portion 4 becomes shallow, and the chip discharge performance decreases. As a result, welding due to chip accumulation is induced, resulting in poor drilling accuracy and breakage of the drill 1. From the above, by setting the thickness X of the core thickness within the range of 0.15 D or more and 0.25 D or less, ensuring the strength of the drill 1, preventing poor drilling accuracy, and preventing breakage of the drill 1. Can be achieved.
- the durability test is a test for examining the influence of the film thickness dimension of the hard compound, the thickness dimension X of the core thickness, and the average particle diameter of WC on the tool life.
- the film thickness dimension, the thickness dimension, and the average particle diameter. is fixed to a predetermined value and compared with a conventional drill.
- the hole depth 7. Continuously perform a drilling force of 2 mm, and compare tool life based on the cutting length calculated by the product of the number of holes drilled and the hole depth of 7.2 mm.
- the drill 1 in the present embodiment has a film thickness dimension of 0.8 m and a thickness dimension X of 0.18.
- the number of processed force holes is 53000 holes (cut length: 380m), and after that, machining cannot be continued due to breakage of drill 1. It became Noh.
- the thickness dimension X of the core thickness within the range of 0.15D or more and 0.25D or less, the strength of the drill 1 is secured and the chip discharge performance is prevented from being lowered. It is thought that the life could be extended.
- the chip discharge property can be synergistically improved.
- chip welding can be prevented and the life of the drill 1 can be synergistically improved.
- the drill 1 in the present embodiment is configured by a drill whose tip end portion of the drill body 3 is an ultrafine small-diameter drill, but the tip end portion of the drill body 3 is configured with a diameter substantially the same as that of the shank 2. Also good.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Drilling Tools (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2005/006603 WO2006109347A1 (ja) | 2005-04-04 | 2005-04-04 | ドリル |
US11/886,707 US20090191016A1 (en) | 2005-04-04 | 2005-04-04 | Drill |
JP2007512392A JPWO2006109347A1 (ja) | 2005-04-04 | 2005-04-04 | ドリル |
DE112005003529T DE112005003529T5 (de) | 2005-04-04 | 2005-04-04 | Bohrer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2005/006603 WO2006109347A1 (ja) | 2005-04-04 | 2005-04-04 | ドリル |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006109347A1 true WO2006109347A1 (ja) | 2006-10-19 |
Family
ID=37086645
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/006603 WO2006109347A1 (ja) | 2005-04-04 | 2005-04-04 | ドリル |
Country Status (4)
Country | Link |
---|---|
US (1) | US20090191016A1 (ja) |
JP (1) | JPWO2006109347A1 (ja) |
DE (1) | DE112005003529T5 (ja) |
WO (1) | WO2006109347A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017145699A1 (ja) * | 2016-02-24 | 2017-08-31 | 株式会社神戸製鋼所 | 穿孔方法及び穿孔装置 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007010601A1 (ja) * | 2005-07-20 | 2007-01-25 | Osg Corporation | ドリル |
KR101898989B1 (ko) * | 2018-04-03 | 2018-09-14 | 코리아에프에이(주) | 복합소재단열재 패널용 롱홀쏘 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01306112A (ja) * | 1988-06-03 | 1989-12-11 | Toshiba Tungaloy Co Ltd | プリント基板加工用の小径ドリル |
JP2002172506A (ja) * | 2000-12-05 | 2002-06-18 | Hitachi Tool Engineering Ltd | 被覆ツイストドリル |
JP2003251503A (ja) * | 2001-12-26 | 2003-09-09 | Sumitomo Electric Ind Ltd | 表面被覆切削工具 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5981010A (ja) * | 1982-10-29 | 1984-05-10 | Nippon Oil & Fats Co Ltd | 穴明け工具 |
US4605347A (en) * | 1982-12-27 | 1986-08-12 | Lockheed Missiles & Space Company, Inc. | High speed drill reamer |
US4898503A (en) * | 1988-07-05 | 1990-02-06 | Lockheed Corporation | Twist drill |
FR2698809B1 (fr) * | 1992-12-09 | 1995-02-24 | Recoules Fils Ets | Foret hélicoïdal de précision. |
JPH06344212A (ja) * | 1993-06-04 | 1994-12-20 | Toshiba Tungaloy Co Ltd | プリント配線基板用の極小径ドリル |
GB9606370D0 (en) * | 1996-03-26 | 1996-06-05 | Dormer Tools Sheffield Ltd | Improvements in or relating to twist drills |
US5846035A (en) * | 1997-07-11 | 1998-12-08 | General Electric Company | Damage resistant drill |
JP2002144125A (ja) * | 2000-08-31 | 2002-05-21 | Mitsubishi Materials Corp | 穴明け工具 |
US6881475B2 (en) * | 2001-06-13 | 2005-04-19 | Sumitomo Electric Industries, Ltd | Amorphous carbon coated tool and fabrication method thereof |
US6843824B2 (en) * | 2001-11-06 | 2005-01-18 | Cerbide | Method of making a ceramic body of densified tungsten carbide |
US20030185640A1 (en) * | 2002-03-27 | 2003-10-02 | Eiji Ito | Multiple rake drill bits |
JP4453270B2 (ja) * | 2003-04-21 | 2010-04-21 | 住友電気工業株式会社 | プリント基板加工用小径ドリル |
WO2007010601A1 (ja) * | 2005-07-20 | 2007-01-25 | Osg Corporation | ドリル |
GB2428611B (en) * | 2005-08-02 | 2007-10-03 | Dormer Tools | Twist drill |
-
2005
- 2005-04-04 JP JP2007512392A patent/JPWO2006109347A1/ja active Pending
- 2005-04-04 US US11/886,707 patent/US20090191016A1/en not_active Abandoned
- 2005-04-04 WO PCT/JP2005/006603 patent/WO2006109347A1/ja not_active Application Discontinuation
- 2005-04-04 DE DE112005003529T patent/DE112005003529T5/de not_active Ceased
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01306112A (ja) * | 1988-06-03 | 1989-12-11 | Toshiba Tungaloy Co Ltd | プリント基板加工用の小径ドリル |
JP2002172506A (ja) * | 2000-12-05 | 2002-06-18 | Hitachi Tool Engineering Ltd | 被覆ツイストドリル |
JP2003251503A (ja) * | 2001-12-26 | 2003-09-09 | Sumitomo Electric Ind Ltd | 表面被覆切削工具 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017145699A1 (ja) * | 2016-02-24 | 2017-08-31 | 株式会社神戸製鋼所 | 穿孔方法及び穿孔装置 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2006109347A1 (ja) | 2008-10-02 |
US20090191016A1 (en) | 2009-07-30 |
DE112005003529T5 (de) | 2008-05-15 |
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