CN107952986A - For manufacturing the blank and its manufacture method of cutting element - Google Patents
For manufacturing the blank and its manufacture method of cutting element Download PDFInfo
- Publication number
- CN107952986A CN107952986A CN201610905375.1A CN201610905375A CN107952986A CN 107952986 A CN107952986 A CN 107952986A CN 201610905375 A CN201610905375 A CN 201610905375A CN 107952986 A CN107952986 A CN 107952986A
- Authority
- CN
- China
- Prior art keywords
- blank
- manufacture
- cutting edge
- cutting element
- body layer
- 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.)
- Withdrawn
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 57
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims description 12
- 239000000463 material Substances 0.000 claims abstract description 16
- 229910003460 diamond Inorganic materials 0.000 claims description 9
- 239000010432 diamond Substances 0.000 claims description 9
- 229910001080 W alloy Inorganic materials 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- 229910052582 BN Inorganic materials 0.000 claims description 5
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 5
- 230000004323 axial length Effects 0.000 claims description 5
- 239000011195 cermet Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 11
- 238000003801 milling Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910001145 Ferrotungsten Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- MOWMLACGTDMJRV-UHFFFAOYSA-N nickel tungsten Chemical compound [Ni].[W] MOWMLACGTDMJRV-UHFFFAOYSA-N 0.000 description 1
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
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
-
- 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
- B23B27/18—Cutting tools of which the bits or tips or cutting inserts are of special material with cutting bits or tips or cutting inserts rigidly mounted, e.g. by brazing
-
- 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
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
- B23C5/18—Milling-cutters characterised by physical features other than shape with permanently-fixed cutter-bits or teeth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
- B23B2222/28—Details of hard metal, i.e. cemented carbide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
- B23B2222/84—Steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
- B23B2222/92—Tungsten
-
- 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
- B23B2226/12—Boron nitride
- B23B2226/125—Boron nitride cubic [CBN]
-
- 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
- B23B2226/18—Ceramic
-
- 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
- B23B2226/31—Diamond
- B23B2226/315—Diamond polycrystalline [PCD]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
- B23C2222/28—Details of hard metal, i.e. cemented carbide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
- B23C2222/84—Steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2226/00—Materials of tools or workpieces not comprising a metal
- B23C2226/12—Boron nitride
- B23C2226/125—Boron nitride cubic [CBN]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2226/00—Materials of tools or workpieces not comprising a metal
- B23C2226/18—Ceramic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2226/00—Materials of tools or workpieces not comprising a metal
- B23C2226/31—Diamond
- B23C2226/315—Diamond polycrystalline [PCD]
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
A kind of blank for being used to manufacture cutting element, including cutting edge forming layer and body layer, cutting edge forming layer are mutually stacked with body layer, and one end of cutting edge (also referred to as shear blade) and helicla flute is formed on cutting edge forming layer；Body layer, forms the main body of helicla flute thereon.The blank of the present invention, with the cutter of its manufacture, has helical angle and complete hard material shear blade, this causes cutter shear blade processing service life and processing effect to be all significantly improved.
Description
Technical field
It is used to manufacture cutting element, more particularly to a kind of milling cutter the present invention relates to a kind of, thereon with curve sword.
Background technology
Tool Industry largely uses man-made polycrystalline diamond composite sheet in the form of annular discs and artificial cubic boron nitride composite piece
Deng superhard material (referring to Fig. 1), the blade of cutter is processed into.Traditional handicraft is that former disk is cut into required shape
(referring to Fig. 2) simultaneously freezes (such as：The methods of vacuum freezes or high frequency freezes) arrive tool matrix (such as：Hard alloy material and steel etc.)
Above (referring to Fig. 3).
These composite sheets can only be attached in plane (referring to Fig. 3), it is impossible to applied on spiral shape cutter, with made of this
The cutting anterior angle of cutter is small not sharp enough.In this regard, designed in industry using cutting edge inclination, but anterior angle angle can only<15 degree (and it is spiral
Tool orthogonal rake is generally more than 30), cause cutter rigidly bad；Or multistage sword is used to imitate helical angle, but manufacturing process
Extremely complex, cost is also high.
Secondly, industry multiple-cutting-edge tool can only be realized on major diameter cutter, and medium-small diameter generally can only single-blade cutting.
The content of the invention
It is an object of the present invention to provide a kind of blank for being used to manufacture cutting element, to manufacture fully hard material bottom
The cutter of sword, the cutting portion outside diameter of the cutter is 0.3mm~75mm, and is made of superhard material, and has complete 2 sword
Cylinder class cutter structure above.
Be used to manufacture the blank of cutting element it is another object of the present invention to provide a kind of, outside diameter for 0.3mm~
Realized on 75mm hard materials and make skew cutting cutter.
Be used to manufacture the blank of cutting element it is yet a further object of the present invention to provide a kind of, outside diameter for 0.3mm~
The manufacture of more pieces of swords is realized on 75mm hard materials.
A further object of the present invention is the method for providing a kind of blank of manufacture for manufacturing cutting element, in order to
Blank is applied to the manufacture of cutter.
Cutter for machining field, such as：Aperture knife tool, milling cutter and boring cutter etc., its appearance is usually with overall presentation
Cylinder is relatively conventional, also with the feature such as groove body and cutting end part.From processing efficiency angle, these cutters generally have 2 pieces
Cutting edge above, cutting edge are also arranged at cutting end part more typically.
A kind of blank for being used to manufacture cutting element provided by the invention, including
Cutting edge forming layer, forms one end of cutting edge (also referred to as shear blade) and helicla flute thereon；
Body layer, forms the main body of helicla flute thereon；
Cutting edge forming layer is mutually stacked with body layer.
The material of body layer is hard alloy, steel or tungsten alloy, the tungsten alloy of more than prioritizing selection tungstenic 60w/w%.
Tungsten alloy contains one or several metals of iron, copper and mickel, is specially：Ferro-tungsten, tungsten-copper alloy and tungsten nickel
Etc. high specific gravity high density tungsten alloy.These tungsten alloys are also containing one or more of metals such as chromium, manganese and cobalt, but be not Tool Industry
In be used to process the hard alloy of blade.
The outside diameter of body is 3mm~75mm, especially 3mm~12mm.
Cutting edge forming layer is cylindric, its axial length is 0.3mm~8mm, and outside diameter is 0.3mm~75mm, and material is such as：People
Make the one or more of polycrystalline diamond, cubic boron nitride and cermet.
In order to obtain the blank for manufacturing cutting element, the present invention provides a kind of manufacture method, including：
By hard material (such as：Man-made polycrystalline diamond, hard alloy, cubic boron nitride and cermet) it is cut into multiple circles
Column grain, that is, be made cutting edge forming layer.Cylinder grain axial length is 0.3mm~8mm, and outside diameter is 0.3mm~30mm,
By the cylinder grain after processing by being combined (such as with body layer (interior cooling hole can be equipped with)：Freezed using high frequency
Or vacuum such as freezes at the mode) blank is made.
In order to increase the combination of cylinder grain and body layer, cylinder grain bottom surface is processed, increases the contact area of bottom surface,
Formed for example：V-type, convex shape and rack type, these shapes are used to increase the combination power for freezing fixed.
The beneficial effect that technical solution of the present invention is realized：
The blank for being used to manufacture cutting element of the present invention, with the cutter of its manufacture, has helical angle and complete hard
Material shear blade, this causes cutter shear blade processing service life and processing effect to be all significantly improved.
Such as：Diamond is used to carry out shear blade processing to complex fiber material for cutter made of cutting edge forming layer, can be with
The service life of about 4 times of acquisition coating diamond cutter and 3 times of processing efficiency.
Brief description of the drawings
Fig. 1 is the schematic diagram of discoid Superhard composite materials；
Fig. 2 is the schematic diagram of the patch of shape required for being obtained from discoid Superhard composite materials；
The patch obtained is is attached to the schematic diagram on tool matrix by Fig. 3；
Fig. 4 is the schematic diagram that the present invention is used to manufacture an embodiment of the blank of cutting element；
Fig. 5 is the schematic diagram that the present invention is used to manufacture another embodiment of the blank of cutting element；
Fig. 6 is the schematic diagram that the present invention is used to manufacture another embodiment of the blank of cutting element；
Fig. 7 is the schematic diagram that the present invention is used to manufacture one embodiment of cutter made of the blank of cutting element.
Embodiment
Below in conjunction with attached drawing detailed description of the present invention technical solution.The embodiment of the present invention only to illustrate the present invention skill
Art scheme and it is unrestricted, although the present invention is described in detail with reference to preferred embodiment, those of ordinary skill in the art
It should be appreciated that can be to the technical solution technical scheme is modified or replaced equivalently of invention, without departing from the essence of technical solution of the present invention
God and scope, it should all cover in scope of the presently claimed invention.
Fig. 4 is the schematic diagram that the present invention is used to manufacture an embodiment of the blank of cutting element, and Fig. 5 is used to make for the present invention
The schematic diagram of another embodiment of the blank of cutting element is made, Fig. 6 is the another of blank of the present invention for manufacturing cutting element
The schematic diagram of embodiment.As shown in Figure 4, Figure 5 and Figure 6, blank of the invention includes 100 body layer 200 of cutting edge forming layer, cutting edge
100 body layer 200 of forming layer forms the one of cutting edge (also referred to as shear blade) and helicla flute into being stacked up and down, in cutting edge forming layer 100
End forms the main body of helicla flute (referring to Fig. 7) in body layer 200.
The outside diameter of body is 3mm~75mm, especially 3mm~12mm, and material is hard alloy, steel or tungsten alloy, preferentially
Select the tungsten alloy of more than tungstenic 60w/w%.
Using laser, wire cutting either wheel grinding method by plate-like hard material be cut into multiple cylinder grains or will
Club-shaped material is cut into segment.Cylinder grain axial length is 0.3mm~8mm, and outside diameter is 0.3mm~75mm.
Cylinder grain bottom surface is processed, is formed for example：V-type (Fig. 4), convex shape (Fig. 5) and rack type (Fig. 6), these
Shape is used to increase the combination power for freezing fixed.
Cylinder grain after processing is freezed by high frequency or the modes such as vacuum freezes (can be equipped with interior cooling with body layer
Hole) it is combined blank is made.
The reconditioning of the rake face and rear knife face of normal each blade is finally carried out to blank, manufactures various cutters such as：But no
It is only limitted to right angle milling cutter, corner rounding(milling) cutter, taper milling cutter and reamer etc..
Fig. 7 is the schematic diagram that the present invention is used to manufacture one embodiment of cutter made of the blank of cutting element.Such as Fig. 7 institutes
Show, cutter includes cutting portion 300 and helicla flute 400.Cutting portion 300 includes cutting end part 310 (also referred to as shear blade) and body 320,
400 main body of helicla flute is located on body 320, and its one end is arranged on cutting end part 310.
Use diamond to carry out shear blade processing to complex fiber material for cutter made of cutting edge forming layer, can be applied
The service life of about 4 times of diamond cutter of layer and 3 times of processing efficiency.
Claims (7)
- A kind of 1. blank for being used to manufacture cutting element, it is characterised in that including：Cutting edge forming layer, forms one end of cutting edge and helicla flute thereon；Body layer, forms the main body of helicla flute thereon；Cutting edge forming layer is mutually stacked with body layer；The outside diameter of the body is 3mm~75mm；The cutting edge forming layer is cylindric, its axial length is 0.3mm~8mm, and outside diameter is 0.3mm~75mm.
- 2. according to claim 1 be used to manufacture the blank of cutting element, it is characterised in that the material of the body layer is Hard alloy, steel or tungsten alloy.
- 3. the blank according to claim 1 for being used to manufacture cutting element, it is characterised in that the blade shape composite material For the one or more of man-made polycrystalline diamond, cubic boron nitride and cermet.
- 4. the manufacture method for being used to manufacture the blank of cutting element described in a kind of claim 1, including：Hard material is cut into multiple cylinder grains, that is, is made cutting edge forming layer, the cylinder grain axial length for 0.3mm~ 8mm, outside diameter are 0.3mm~75mm,Blank is made by being combined with body layer in cylinder grain after processing；The hard material is the one or more of man-made polycrystalline diamond, hard alloy, cubic boron nitride and cermet.
- 5. manufacture method according to claim 4, it is characterised in that the cylinder grain is combined with the body layer Method freeze or vacuum freezes for high frequency.
- 6. manufacture method according to claim 4, it is characterised in that further include and be first processed to cylinder grain bottom surface, increased Contact area, then carry out the cylinder grain and be combined processing with the body layer.
- 7. manufacture method according to claim 4, it is characterised in that form V-type, convex shape in the cylinder grain bottom surface Or rack type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610905375.1A CN107952986A (en) | 2016-10-17 | 2016-10-17 | For manufacturing the blank and its manufacture method of cutting element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610905375.1A CN107952986A (en) | 2016-10-17 | 2016-10-17 | For manufacturing the blank and its manufacture method of cutting element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107952986A true CN107952986A (en) | 2018-04-24 |
Family
ID=61954033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610905375.1A Withdrawn CN107952986A (en) | 2016-10-17 | 2016-10-17 | For manufacturing the blank and its manufacture method of cutting element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107952986A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110744108A (en) * | 2019-10-15 | 2020-02-04 | 大连理工大学 | Method for machining drill bit with edge-inclined groove structure for machining composite material |
| US20220297201A1 (en) * | 2019-09-18 | 2022-09-22 | Sumitomo Electric Hardmetal Corp. | Diamond cutting tool |
| US20220355392A1 (en) * | 2019-06-20 | 2022-11-10 | Osg Corporation | Cutting tool |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4679971A (en) * | 1982-09-02 | 1987-07-14 | Hartmetallwerkzeugfabrik Andreas Maier Gmbh & Co. Kg | Rotary cutting tool and process for making same |
| US5580196A (en) * | 1991-08-08 | 1996-12-03 | Habit Diamond Limited | Wear resistant tools |
| CN1213993A (en) * | 1996-02-15 | 1999-04-14 | 哈比特钻石有限公司 | Machining tool and method for forming same |
| CN1260742A (en) * | 1997-06-13 | 2000-07-19 | 桑德维克公司 | Method of making end mills |
| CN101282806A (en) * | 2005-08-02 | 2008-10-08 | 天窗工具有限公司 | Twist drill |
| CN206215996U (en) * | 2016-10-17 | 2017-06-06 | 上海精韧激光科技有限公司 | Blank for manufacturing cutting element |
-
2016
- 2016-10-17 CN CN201610905375.1A patent/CN107952986A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4679971A (en) * | 1982-09-02 | 1987-07-14 | Hartmetallwerkzeugfabrik Andreas Maier Gmbh & Co. Kg | Rotary cutting tool and process for making same |
| US5580196A (en) * | 1991-08-08 | 1996-12-03 | Habit Diamond Limited | Wear resistant tools |
| CN1213993A (en) * | 1996-02-15 | 1999-04-14 | 哈比特钻石有限公司 | Machining tool and method for forming same |
| CN1260742A (en) * | 1997-06-13 | 2000-07-19 | 桑德维克公司 | Method of making end mills |
| CN101282806A (en) * | 2005-08-02 | 2008-10-08 | 天窗工具有限公司 | Twist drill |
| CN206215996U (en) * | 2016-10-17 | 2017-06-06 | 上海精韧激光科技有限公司 | Blank for manufacturing cutting element |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220355392A1 (en) * | 2019-06-20 | 2022-11-10 | Osg Corporation | Cutting tool |
| US20220297201A1 (en) * | 2019-09-18 | 2022-09-22 | Sumitomo Electric Hardmetal Corp. | Diamond cutting tool |
| CN110744108A (en) * | 2019-10-15 | 2020-02-04 | 大连理工大学 | Method for machining drill bit with edge-inclined groove structure for machining composite material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180424 |