WO2016043098A1 - ドリル - Google Patents
ドリル Download PDFInfo
- Publication number
- WO2016043098A1 WO2016043098A1 PCT/JP2015/075543 JP2015075543W WO2016043098A1 WO 2016043098 A1 WO2016043098 A1 WO 2016043098A1 JP 2015075543 W JP2015075543 W JP 2015075543W WO 2016043098 A1 WO2016043098 A1 WO 2016043098A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ridge line
- negative land
- flank
- drill
- margin
- Prior art date
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
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/04—Coating on selected surface areas, e.g. using masks
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
-
- 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
- B23B2228/08—Properties of materials of tools or workpieces, materials of tools or workpieces applied in a specific manner applied by physical vapour deposition [PVD]
-
- 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
- B23B2251/00—Details of tools for drilling machines
- B23B2251/08—Side or plan views of cutting edges
- B23B2251/082—Curved cutting edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/12—Cross sectional views of the cutting edges
- B23B2251/122—Bevelled cutting edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/12—Cross sectional views of the cutting edges
- B23B2251/125—Rounded cutting edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/14—Configuration of the cutting part, i.e. the main cutting edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/40—Flutes, i.e. chip conveying grooves
- B23B2251/408—Spiral grooves
-
- 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
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/228—Gas flow assisted PVD deposition
-
- 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
- Y10T408/905—Having stepped cutting edges
- Y10T408/906—Axially spaced
-
- 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
- This invention relates to a drill with improved lifespan by devising a cutting edge treatment.
- the cutting edge is strengthened by applying a cutting edge treatment as a measure for improving the life.
- the scissors cutting edge can be strengthened by eliminating the sharp part of the cutting edge by chamfering or honing.
- Patent Document 1 As a cutting edge processing for strengthening, for example, Patent Document 1 below performs chamfering that combines a face with a curved surface or a chamfered surface of a curved surface of a twist drill. Then, the curved surface portion of the chamfered portion is made into a mirror surface shape or a satin shape, thereby suppressing the floating of the hard particles on the surface of the curved surface portion.
- the cutting edge is generally reinforced by cutting the rake face and the flank face along the cutting edge so that the cutting edge is blunted. It is difficult to suppress damage to parts.
- the outermost peripheral part of the cutting edge with the highest cutting speed especially the chipping performance of the ridgeline at the position where the flank and chamfered surface intersect, and the position where the flank and margin intersect. not enough.
- This invention aims to improve the life of a drill compared to a conventional drill that has been subjected to a general cutting edge process, by making it difficult to cause wear and damage to the outer peripheral portion of the cutting edge of the drill.
- a drill according to an aspect of the present invention provided as a solution to the above-described problem includes a negative land for reinforcing the cutting edge on a rake face, and the negative land and the flank face, the flank face and the margin, and the position where the negative land and the margin intersect.
- Each ridge line is a convex curved surface in a longitudinally perpendicular cross section, and when the curvature radius of the convex curved surface of the first ridge line at the position where the flank and the negative land intersect is 1, the first position at the position where the flank and the margin intersect.
- the drill had a radius of curvature of the convex surface of the two ridges of 0.8 to 1.5 times, and a radius of curvature of the convex surface of the fourth ridge line at the position where the negative land and the margin intersected 1.5 to 3.0 times.
- the drill according to one aspect of the present invention is less prone to minute chipping on the outer peripheral portion of the cutting edge, and early wear caused by the minute chipping is suppressed, thereby greatly extending the life.
- a drill according to one aspect of the present invention includes a negative land for reinforcing a cutting edge on a rake face, and each ridge line at a position where the negative land and the flank, the flank and the margin, and the negative land and the margin intersect with each other is a convex curved surface Where the radius of curvature of the convex surface of the first ridge line at the position where the flank and the negative land intersect is 1, the radius of curvature of the convex surface of the second ridge line at the position where the flank and the margin intersect is 1.
- the drill had a radius of curvature of the convex curved surface of the fourth ridge line at a position where the negative land intersected with the margin 0.8 to 1.5 times and the radius of curvature 1.5 to 3.0 times.
- each ridgeline at the position where the negative land and flank, the flank and margin, and the negative land and the margin intersect is formed on the convex curved surface, and the radius of curvature of the convex surface of the first ridge line at the position where the flank and negative land intersect is determined.
- the radius of curvature of the convex surface of the second ridge line at the position where the flank and the margin intersect is 0.8 to 1.5 times
- the radius of curvature of the convex surface of the fourth ridge line at the position where the negative land and the margin intersect is less likely to cause minute chipping on the outer peripheral portion of the cutting edge, and the early wear caused by the minute chipping is suppressed, thereby greatly extending the life.
- the illustrated drill 1 is a two-blade twist drill.
- the groove surface in the vicinity of the tip of the twisted groove 3 provided on the outer periphery of the main body 2 is a rake surface 4.
- the cutting edge 6 is formed by the ridge line at the position where the rake face 4 and the flank 5 at the tip intersect, and the ridge line at the position where the groove face of the thinning portion 7 formed at the center of the tip of the main body 2 and the flank 5 intersect.
- Reference numeral 8 denotes a margin
- reference numeral 9 denotes a shank connected to the rear of the main body 2.
- This drill 1 has a negative land 10 for reinforcing the cutting edge on the rake face 4.
- the negative land 10 provided in the illustrated drill is inclined by a predetermined angle ⁇ with respect to the axis of the drill in a negative direction (a direction opposite to the twist direction of the twist groove 3).
- the heel angle ⁇ is set to about ⁇ 15 ° to ⁇ 35 ° in consideration of the balance between the sharpness of the cutting edge and the strengthening of the cutting edge.
- the width w (see FIG. 4) of the negative land 10 when viewed perpendicular to the axis is set to about 0.03 mm to 0.15 mm.
- This invention examined a measure for effectively suppressing wear and damage on the outer peripheral portion of the cutting edge. Then, it is effective to form the first ridge line RL1, the second ridge line RL2, and the fourth ridge line RL4 at a position where the three surfaces of the flank 5, the margin 8 and the negative land 10 intersect with each other in a convex curved surface in the longitudinal cross section. I found it. These ridge lines are rounded to form a convex curved surface.
- the first ridge line RL1 is the ridge line at the position where the flank 5 and the negative land 10 intersect
- the second ridge line RL2 is the ridge line at the position where the flank 5 and the margin 8 intersect
- the fourth ridge line RL4 is the negative land 10 The ridgeline at the position where the margin 8 intersects.
- the third ridge line RL3 at the position where the rake face 4 and the margin 8 intersect and the fifth ridge line RL5 at the position where the negative land 10 and the rake face 4 intersect also are the same as the first ridge line RL1, the second ridge line RL2, and the fourth ridge line RL4. May be rounded.
- the fifth ridge line RL5 is also strengthened by the rounding process.
- the curvature radius of the convex curved surface in the longitudinal cross section of each of the first ridge line RL1 to the fourth ridge line RL4 is preferably 0.01 mm or more.
- the curvature radius of the convex curved surface of each ridge line is a ratio when the curvature radius of the first ridge line RL1 is 1, and the curvature radii of the second ridge line RL2 and the third ridge line RL3 are 0.8 to 1.5 times,
- the radius of curvature of the fourth ridgeline RL4 should be 1.5 to 3.0 times.
- the appropriate radius of curvature of the first ridge line RL1 is 0.015 mm to 0.035 mm.
- the radius of curvature of the first ridgeline RL1 was more preferably 0.021 to 0.035 mm. By this range, minute chipping on the outer peripheral portion of the cutting edge is difficult to occur, early wear that triggers minute chipping is suppressed, and the life is greatly extended.
- the first ridge line RL1 preferably has a larger curvature radius on the outer peripheral side than the curvature radius on the rotation center side. Decreasing the sharpness of the cutting edge can be suppressed by reducing the radius of curvature on the rotation center side. The effect of strengthening the corner C can be enhanced by increasing the radius of curvature on the outer peripheral side.
- the radius of curvature of the second ridgeline RL2 was preferably 0.020 to 0.040 mm, and the radius of curvature of the fourth ridgeline RL4 was preferably 0.040 to 0.075 mm.
- each ridge line between the negative land and the flank, between the negative land and the margin, and between the flank and the margin is rounded.
- it is formed in a convex curved surface in the longitudinal cross section.
- each ridge line was performed by inserting the tip of a drill into a powdered abrasive media and rotating the drill in this state to move in a direction perpendicular to the axis.
- the third ridge line RL3 and the fifth ridge line RL5 are also convex curved surfaces with rounded longitudinal cross sections.
- the curvature radii of the convex curved surfaces of the first ridge line RL1, the second ridge line RL2, and the fourth ridge line RL4 are about 0.025 mm for the first ridge line RL1, about 0.03 mm for the second ridge line RL2, and 0.060 mm for the fourth ridge line RL4. It is about.
- TiAl coating film was formed on the surface of the drill by the PVD method after the edge-strengthening treatment.
- This prototype drill and a comparative drill in which a negative land similar to the prototype drill is formed on the rake face and the ridgeline between the negativeland and the flank surface is rounded by honing (only the method of processing the ridgeline differs from the prototype drill) The workpiece was drilled under the following cutting conditions.
- the wear point of the prototype drill is slightly separated from the corner C tip. This is because the corner C is also rounded by rounding the three ridgelines of the first ridgeline RL1, the second ridgeline RL2 and the fourth ridgeline RL4, and thereby the contact point of the outer edge of the cutting edge with respect to the work material retreats. Because.
- the part where wrinkle wear has occurred is less likely to be chipped than the corner tip.
- the spread of minute chipping is suppressed, and the progress of wear at the corner portion where the negative land, the flank surface, and the margin surface intersect each other is delayed as compared with the conventional product.
- the drill used in the performance evaluation test is a two-blade coated twist drill having a hard coating on the surface.
- the present invention is applicable to a drill without a hard coating, the number of blades is 3 or more.
- the above drills and straight drills in which the chip discharge grooves are not twisted are also included.
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- 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
本発明の一態様にかかるドリルは、すくい面に刃先強化用のネガランドを備え、そのネガランドと逃げ面、逃げ面とマージン、及びネガランドとマージンが交差した位置の各稜線が長手直角断面において凸曲面としたものであって、逃げ面とネガランドが交差した位置の第1稜線の凸曲面の曲率半径を1としたとき、逃げ面とマージンが交差した位置の第2稜線の凸曲面の曲率半径を0.8~1.5倍、ネガランドとマージンが交差した位置の第4稜線の凸曲面の曲率半径を1.5~3.0倍にしたドリルとした。
以下、この発明の実施形態にかかるドリルの具体例を以下に添付図面の図1~図5を参照しつつ説明する。なお、本発明はこれ等の例示に限定されるものではなく、特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。
被削材 :S50C(HB230)
切削速度Vc=80m/min
送りf =0.25mm/rev
加工穴深さH=38mm
総切削長 :36m
内部給油の湿式切削
2 本体部
3 ねじれ溝
4 すくい面
5 逃げ面
6 切れ刃
7 シンニング部
8 マージン
9 シャンク
10 ネガランド
RL1 逃げ面とネガランドが交差した位置の第1稜線
RL2 逃げ面とマージンが交差した位置の第2稜線
RL3 すくい面とマージンが交差した位置の第3稜線
RL4 ネガランドとマージンが交差した位置の第4稜線
RL5 ネガランドとすくい面が交差した位置の第5稜線
α ネガランドの傾き角
w ネガランドの軸直角視における幅
C ネガランドと逃げ面とマージンの3面が交わったコーナ
Claims (7)
- すくい面にネガランドを備え、前記ネガランドと逃げ面、逃げ面とマージン、及び前記ネガランドと前記マージンが交差した各稜線が長手直角断面において凸曲面としたドリルであって、
前記逃げ面と前記ネガランドが交差した位置の第1稜線の凸曲面の曲率半径を1としたとき、前記逃げ面と前記マージンが交差した位置の第2稜線の凸曲面の曲率半径を0.8~1.5倍、前記ネガランドと前記マージンが交差した位置の第4稜線の凸曲面の曲率半径を1.5~3.0倍にしたドリル。 - 前記逃げ面と前記ネガランドが交差した位置の前記第1稜線の凸曲面の曲率半径が0.015mm~0.035mmである請求項1に記載のドリル。
- 前記逃げ面と前記ネガランドが交差した位置の前記第1稜線の凸曲面の曲率半径が0.021mm~0.035mmである請求項1に記載のドリル。
- 前記逃げ面と前記ネガランドが交差した位置の前記第1稜線の凸曲面は、回転中心側の曲率半径よりも外周側の曲率半径が大きくなっている請求項1~請求項3のいずれか1項に記載のドリル。
- 前記ネガランドの軸直角視における幅が0.03mm~0.15mmに設定された請求項1~請求項4のいずれか1項に記載のドリル。
- 前記すくい面と前記マージンが交差した位置の第3稜線が長手直角断面において凸曲面に形成された請求項1~請求項5のいずれか1項に記載のドリル。
- 表面に耐摩耗性に優れる硬質被膜が施された請求項1~請求項6のいずれか1項に記載のドリル。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/504,970 US10155269B2 (en) | 2014-09-19 | 2015-09-09 | Drill |
EP15841373.2A EP3195967B1 (en) | 2014-09-19 | 2015-09-09 | Drill |
CN201580044289.XA CN106573317B (zh) | 2014-09-19 | 2015-09-09 | 钻头 |
JP2016506924A JP6611260B2 (ja) | 2014-09-19 | 2015-09-09 | ドリル |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014191156 | 2014-09-19 | ||
JP2014-191156 | 2014-09-19 |
Publications (1)
Publication Number | Publication Date |
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WO2016043098A1 true WO2016043098A1 (ja) | 2016-03-24 |
Family
ID=55533137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/075543 WO2016043098A1 (ja) | 2014-09-19 | 2015-09-09 | ドリル |
Country Status (5)
Country | Link |
---|---|
US (1) | US10155269B2 (ja) |
EP (1) | EP3195967B1 (ja) |
JP (1) | JP6611260B2 (ja) |
CN (1) | CN106573317B (ja) |
WO (1) | WO2016043098A1 (ja) |
Cited By (3)
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WO2019131177A1 (ja) | 2017-12-26 | 2019-07-04 | 三菱日立ツール株式会社 | ドリル |
JP2019209439A (ja) * | 2018-06-06 | 2019-12-12 | 株式会社タンガロイ | ドリル |
WO2020075698A1 (ja) * | 2018-10-11 | 2020-04-16 | 株式会社不二越 | 硬質皮膜被覆ドリル |
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US11376675B2 (en) * | 2014-04-23 | 2022-07-05 | Korloy Inc. | Cutting tool having partially-removed film formed thereon |
JP1568741S (ja) * | 2016-09-09 | 2017-02-06 | ||
JP1581012S (ja) * | 2016-11-17 | 2017-07-10 | ||
USD840449S1 (en) * | 2017-06-28 | 2019-02-12 | Gino Development, Inc. | Twisted drill bit tip |
WO2019021785A1 (ja) * | 2017-07-27 | 2019-01-31 | 住友電工ハードメタル株式会社 | ドリル |
US11407040B2 (en) * | 2018-05-21 | 2022-08-09 | Osg Corporation | Drill |
USD878437S1 (en) * | 2018-08-06 | 2020-03-17 | Peter L. Bono | Helical fluted forward and reverse rotation cutting tool |
USD878438S1 (en) * | 2018-08-06 | 2020-03-17 | Peter L. Bono | Helical fluted forward and reverse rotation cutting tool |
JP1622531S (ja) * | 2018-08-07 | 2019-01-21 | ||
DE102019102334A1 (de) * | 2019-01-30 | 2020-07-30 | Kennametal Inc. | Verfahren zur Herstellung eines Schneidwerkzeugs sowie Schneidwerkzeug |
USD958856S1 (en) * | 2020-05-21 | 2022-07-26 | Korloy Inc. | Drill bit |
USD983850S1 (en) * | 2021-10-13 | 2023-04-18 | Seoul Fastening Co., Ltd. | Drill bit |
USD976293S1 (en) * | 2021-10-13 | 2023-01-24 | Seoul Fastening Co., Ltd. | Drill bit |
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WO2020075698A1 (ja) * | 2018-10-11 | 2020-04-16 | 株式会社不二越 | 硬質皮膜被覆ドリル |
JPWO2020075698A1 (ja) * | 2018-10-11 | 2021-10-07 | 株式会社不二越 | 硬質皮膜被覆ドリル |
JP2022119891A (ja) * | 2018-10-11 | 2022-08-17 | 株式会社不二越 | 硬質皮膜被覆ドリル |
JP7256947B2 (ja) | 2018-10-11 | 2023-04-13 | 株式会社不二越 | 硬質皮膜被覆ドリル |
JP7274090B2 (ja) | 2018-10-11 | 2023-05-16 | 株式会社不二越 | 硬質皮膜被覆ドリル |
Also Published As
Publication number | Publication date |
---|---|
CN106573317B (zh) | 2018-10-16 |
EP3195967B1 (en) | 2018-08-01 |
CN106573317A (zh) | 2017-04-19 |
EP3195967A1 (en) | 2017-07-26 |
JP6611260B2 (ja) | 2019-11-27 |
US20170274460A1 (en) | 2017-09-28 |
US10155269B2 (en) | 2018-12-18 |
EP3195967A4 (en) | 2017-09-06 |
JPWO2016043098A1 (ja) | 2017-07-06 |
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