CN108943438A - Milling cutter - Google Patents
Milling cutter Download PDFInfo
- Publication number
- CN108943438A CN108943438A CN201811120278.7A CN201811120278A CN108943438A CN 108943438 A CN108943438 A CN 108943438A CN 201811120278 A CN201811120278 A CN 201811120278A CN 108943438 A CN108943438 A CN 108943438A
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- Prior art keywords
- cutter
- blade
- cutter head
- substrate
- knife handle
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/18—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools
- B28D1/186—Tools therefor, e.g. having exchangeable cutter bits
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Knives (AREA)
Abstract
The invention discloses a kind of milling cutters, and including cutter head and the knife handle being fixedly connected with the cutter head, the cutter head includes substrate and the polycrystalline diamond layer in the substrate；The knife handle and the material of the substrate are hard alloy, and the substrate welds together with the knife handle；The top surface that the cutter head has side and is connected with the side, the cutter head is equipped with 9-12 blade being distributed relative to the center of the top surface in emitting shape, the 9-12 blade extends on the side from the top surface, is equipped with cutter groove between every two adjacent blade.Milling cutter of the invention has many advantages, such as that long service life, the rejection rate of workpieces processing are low, processing effect is good.
Description
Technical field
The present invention relates to field of machining more particularly to a kind of milling cutters.
Background technique
Diamond cutter have extreme hardness and wearability, high heat conductance, low thermal coefficient of expansion, low-friction coefficient, with it is non-
The features such as ferrous metal affinity is small makes it obtain very high machining accuracy and processing efficiency in high-speed cutting.Diamond cutter
Processing characteristics be to be determined by the crystal structure of diamond, in diamond crystal, each carbon atom is adjacent with four
Carbon atom forms covalent bond, is spatially in positive tetrahedron structure, binding force is high between the carbon atom of this structure, macroscopically
Show high hardness.
Currently, diamond cutter mainly has single-crystal diamond (MCD) cutter, polycrystalline diamond (PCD) cutter and diamond
Coated cutting tool.Due to the characteristic of diamond lattic structure, the directionality of performance is very strong, and single-crystal diamond is easily along its cleavage facial cleft；
Polycrystalline diamond is formed by the different fine diamond of orientation is grained sintered, is shown as isotropy, is not easy along its cleavage facial cleft；
Diamond-coated tools also can get isotropic diamond coatings, so being not easy along its cleavage by controlling depositing operation
Facial cleft.
Polycrystal diamond cutter compares with diamond-coated tools, and there are diamond coatings and cement carbide substrate by the latter
Binding force is weak, between coating and the substrate difference of thermal expansion coefficients it is larger and the problems such as generate internal stress, diamond-coated tools
Disbonding easily occurs in high-speed milling, leads to coating failure；, since adhesive is added, hardness and wearability are lower than for the former
Diamond-coated tools, but the serious binding force problem of diamond-coated tools is not present in it.
However, when using common single-blade, twolip, four sword PCD knives processing glass or ceramics, due to cutter in process
It can push, be easy crushing glass or ceramics, cause rejection rate higher, in addition the service life of common PCD knife is relatively low.
Summary of the invention
The purpose of the present invention is to provide the rejection rate of a kind of milling cutter, long service life, workpieces processing is low, processing effect compared with
It is good.
To realize above goal of the invention, the present invention provides a kind of milling cutter, including cutter head and is fixedly connected with the cutter head
Knife handle, the cutter head includes substrate and the polycrystalline diamond layer in the substrate；The knife handle and the substrate
Material is hard alloy, and the substrate welds together with the knife handle；
The top surface that the cutter head has side and is connected with the side, the cutter head are equipped with relative to the top surface
Center be in emitting shape distribution 9-12 blade, the 9-12 blade extend on the side from the top surface, often
Cutter groove is equipped between two adjacent blades.
Optionally, the length of the cutter groove is 3mm-7mm；The depth of the cutter groove is 1mm-2mm.
Optionally, the tread of the blade is 0.1mm-0.8mm.
Optionally, the surface roughness Ra of the blade is 0.1 μm -0.4 μm.
Optionally, in the shape of a spiral, the helical angle of the blade is 15 ° -30 ° to the 9-12 blade.
Optionally, the anterior angle of the cutter groove is 2 ° -10 °.
Optionally, the shape of the blade is triangle or trapezoidal.
Optionally, the cutter head and knife handle are cylindrical.
Optionally, the hard alloy is tungsten carbide base carbide alloy.
Optionally, the top center region of the cutter head is equipped with groove.
Beneficial effects of the present invention: a kind of milling cutter provided by the invention is 9-12 sword PCD knife, relative to existing common
For PCD knife, the service life is longer for milling cutter of the invention, and the rejection rate of workpieces processing is lower.In addition, milling cutter of the invention is also
Have many advantages, such as that high in machining efficiency, wearability is good, coefficient of friction is small, thermal coefficient is high.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of the scope of the invention.
Fig. 1 is the schematic front view of milling cutter of the invention；
Fig. 2 is the schematic side view of milling cutter of the invention；
Fig. 3 is the stereoscopic schematic diagram of milling cutter of the invention；
Fig. 4 is the partial enlargement diagram of the milling cutter of Fig. 1.
Main element symbol description:
10- cutter head；
20- knife handle；
11- blade；
12- cutter groove；
13- groove；
The top surface 31-；
The side 32-.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
The component of embodiments of the present invention, which are generally described and illustrated herein in the accompanying drawings can be come with a variety of different configurations
Arrangement and design.Therefore, requirement is not intended to limit to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
The scope of the present invention of protection, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, this field skill
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Hereinafter, term " includes ", " having " and its cognate that can be used in various embodiments of the present invention are only
It is intended to mean that special characteristic, number, step, operation, the combination of element, component or aforementioned item, and is understood not to first
Exclude the combined presence or increase by one of one or more other features, number, step, operation, element, component or aforementioned item
A or more feature, number, step, operation, element, component or aforementioned item combination a possibility that.
In various embodiments of the present invention, statement " A or/and B " includes any combination or the institute of the text listed file names with
There is combination, it may include A, may include B or may include A and B both.
In the description of the present invention, it is to be understood that, term " longitudinal direction ", " transverse direction ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", " transverse direction ", "top", "bottom", "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to limit of the invention
System.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, it is not understood to indicate or imply relatively heavy
The property wanted.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
In the description of the present invention, unless otherwise specified and limited, it should be noted that term " installation ", " connected ",
" connection " shall be understood in a broad sense, for example, it may be mechanical connection, the connection being also possible to inside two elements, can be directly
It is connected, can also indirectly connected through an intermediary, for the ordinary skill in the art, it can be as the case may be
Understand the concrete meaning of above-mentioned term.Unless otherwise defined, otherwise all terms used herein (including technical term and section
Technics) there is meaning identical with the normally understood meaning of various embodiments of the present invention one skilled in the art.
The term (term such as limited in the dictionary generally used) be to be interpreted as with in the related technical field
The identical meaning of situational meaning and it will be interpreted as having Utopian meaning or meaning too formal, unless in this hair
It is clearly defined in bright various embodiments.
It please refers to Fig.1 to Fig.3, the present invention provides a kind of milling cutter, including cutter head 10 and is fixedly connected with the cutter head 10
Knife handle 20, the cutter head 10 include substrate and the polycrystalline diamond layer in the substrate, the knife handle 20 with it is described
The material of substrate is hard alloy, and the substrate of the cutter head 10 welds together with the knife handle 20；
The top surface 31 that the cutter head 10 has side 32 and is connected with the side 32, the cutter head 10 are equipped with opposite
In the 9-12 blade 11 that the center of the top surface 31 is in emitting shape distribution, the 9-12 blade 11 prolongs from the top surface 31
It extends on the side 32, is equipped with cutter groove 12 between every two adjacent blade 11.
Specifically, the cutter head 10 and knife handle 20 are cylindrical.
Optionally, in the shape of a spiral, the helical angle of the blade 11 is 15 ° -30 ° to the 9-12 blade 11.
Optionally, the anterior angle of the cutter groove 12 is 2 ° -10 °；The anterior angle of the cutter groove 12 fathoms as 0.1mm-
0.4mm。
Optionally, the length of the cutter groove 12 is 3mm-7mm.
Optionally, the depth of the cutter groove 12 is 1mm-2mm.
Optionally, the tread of the blade 11 is 0.1mm-0.8mm.
Optionally, the surface roughness Ra of the blade 11 is 0.1 μm -0.4 μm.
Optionally, the shape of the blade 11 is triangle or trapezoidal.
Referring to Fig. 4, on the top surface 31 of the cutter head 10, plane where the slot bottom of the cutter groove 12 be located at the knife
The angular range of the side of the blade 11 of 12 two sides of slot is 60 ° -120 °.
Specifically, the knife handle 20 needs to select suitable cemented carbide material, usually selection tungsten carbide with the substrate
Base cemented carbide, it is however generally that, when cobalt content is identical, tungsten carbide crystal grain degree is smaller, and hardness is bigger, wearability is better, still
Bending strength, toughness relative reduction, in addition, cobalt content is bigger when other conditions are constant, the toughness of material is better, but hardness
Relative reduction, specifically how to select material optionally for, heretofore described knife handle 20 is closed with the hard that the substrate is selected
Gold is tungsten carbide base carbide alloy, and wherein the quality percentage amounts of cobalt are no more than 12%, and grain size is 0.4 μm.
Specifically, the top center region of the cutter head 10 is equipped with groove 13, to avoid described in workpiece process
The top center portion of cutter head 10 point causes machining interference.
Optionally, the groove 13 is rounded.
Between the design of multiple-cutting-edge PCD knife usually requires between the shape (triangle, trapezoidal etc.) in view of blade 11, blade 11
Away from, blade 11 angle (two-point method: 11 top end point A of blade, 11 lower end of blade point B, center of circle O, angle is ∠ OAB, AB and OA
Angle), it is contemplated that (cutter groove 12 is deeper, and mechanical strength is got over for the depth of the mechanical strength of blade 11, wear resistance, cutter groove 12
It is low, and cutter groove 12 may shallowly interfere with very much processing effect).The present invention has comprehensively considered multiple design elements of multiple-cutting-edge PCD knife, mentions
A kind of milling cutter for designing reasonable, mechanical strength and wear resistance is higher and processing effect is excellent is supplied.
Using common single-blade, twolip, four sword PCD knives processing glass or ceramics when, due in process cutter can under
Pressure is easy crushing glass or ceramics, causes rejection rate higher, in addition the service life of common PCD knife is relatively low.The present invention provides
A kind of 9-12 sword PCD knife, compared with common PCD knife, the monodentate cutting output of the 9-12 sword PCD knife substantially reduces, due to chip
Amount determines blade 11 and wear of work amount, therefore processed relative to common PCD knife, 9-12 sword PCD knife of the invention
The roughness of workpiece is substantially reduced.Also, for common PCD knife, the service life of 9-12 sword PCD knife of the invention is more
Long, the service life of common PCD knife is usually ten to 20 workpiece of polishing, and the use of 9-12 sword PCD knife of the invention
Service life can reach several hundred workpiece of polishing.
Specifically, the PCD material that milling cutter of the invention uses has the advantage that
1, the hardness of PCD is 8000HV, is 80 to 120 times of hard alloy；
2, the thermal coefficient of PCD is 700W/mk, is 1.5 to 9 times of hard alloy, therefore PCD cutter heat transfer is fast
Speed；
3, the coefficient of friction of PCD is generally 0.1~0.3, and the coefficient of friction of hard alloy is 0.4~1, therefore PCD knife
Tool is significantly reduced cutting force；
4, the thermal expansion coefficient of PCD is 0.9 × 10-6To 1.18 × 10-6, it is the 1/5 of hard alloy, therefore PCD cutter is warm
Deform small, machining accuracy height.
The above advantage based on PCD material, milling cutter of the invention for long service life, workpieces processing rejection rate it is low,
High in machining efficiency, the advantages that wearability is good, coefficient of friction is small, thermal coefficient is high.It is 10000 to 20000r/ in processing revolving speed S
Min, in the case that cutter bite is 0.005mm, milling cutter of the invention is used to process the glass of 5.5 inches of mobile phone screen sizes
200-300 piece or so can be processed when profile.
Embodiment 1
A kind of milling cutter, including cutter head 10 and the knife handle 20 being fixedly connected with the cutter head 10, the cutter head 10 includes base
Bottom and the polycrystalline diamond layer in the substrate, the knife handle 20 and the material of the substrate are tungsten carbide-base hard
Alloy, the substrate of the cutter head 10 weld together with the knife handle 20；
The top surface 31 that the cutter head 10 has side 32 and is connected with the side 32, the cutter head 10 are equipped with opposite
In 9 blades 11 that the center of the top surface 31 is in emitting shape distribution, 9 blades 11 extend to institute from the top surface 31
It states on side 32, is equipped with cutter groove 12 between every two adjacent blade 11.
The cutter head 10 includes substrate and the polycrystalline diamond layer in the substrate；The substrate and the knife handle
20 material is tungsten carbide base carbide alloy, and the substrate welds together with the knife handle 20.
The cutter head 10 and knife handle 20 are cylindrical；The top center region of the cutter head 10 is equipped with groove 13, described
Groove 13 is rounded.
In the shape of a spiral, the helical angle of the blade 11 is 17 ° to 9 blades 11.
The anterior angle of the cutter groove 12 is 5 °；
The anterior angle of the cutter groove 12 fathoms as 0.2mm.
The length of the cutter groove 12 is 4mm.
The depth of the cutter groove 12 is 1.2mm.
The tread of the blade 11 is 0.2mm.
The surface roughness Ra of the blade 11 is 0.25 μm.
The shape of the blade 11 is trapezoidal.
Following table illustrates the milling cutter and existing welding type PCD profile cutter and hard alloy of the record of the embodiment of the present invention 1
The comparative situation of the performance test data of profile cutter.
Embodiment 2
A kind of milling cutter, including cutter head 10 and the knife handle 20 being fixedly connected with the cutter head 10, the cutter head 10 includes base
Bottom and the polycrystalline diamond layer in the substrate, the knife handle 20 and the material of the substrate are tungsten carbide-base hard
Alloy, the substrate of the cutter head 10 weld together with the knife handle 20；
The top surface 31 that the cutter head 10 has side 32 and is connected with the side 32, the cutter head 10 are equipped with opposite
In 10 blades 11 that the center of the top surface 31 is in emitting shape distribution, 10 blades 11 are extended to from the top surface 31
On the side 32, cutter groove 12 is equipped between every two adjacent blade 11.
The cutter head 10 includes substrate and the polycrystalline diamond layer in the substrate；The substrate and the knife handle
20 material is tungsten carbide base carbide alloy, and the substrate welds together with the knife handle 20.
The cutter head 10 and knife handle 20 are cylindrical；The top center region of the cutter head 10 is equipped with groove 13, described
Groove 13 is rounded.
In the shape of a spiral, the helical angle of the blade 11 is 22 ° to 10 blades 11.
The anterior angle of the cutter groove 12 is 6 °；
The anterior angle of the cutter groove 12 fathoms as 0.3mm.
The length of the cutter groove 12 is 6mm.
The depth of the cutter groove 12 is 1.7mm.
The tread of the blade 11 is 0.5mm.
The surface roughness Ra of the blade 11 is 0.2 μm.
The shape of the blade 11 is triangle.
Following table illustrates the milling cutter and existing welding type PCD profile cutter and hard alloy of the record of the embodiment of the present invention 2
The comparative situation of the performance test data of profile cutter.
Embodiment 3
A kind of milling cutter, including cutter head 10 and the knife handle 20 being fixedly connected with the cutter head 10, the cutter head 10 includes base
Bottom and the polycrystalline diamond layer in the substrate, the knife handle 20 and the material of the substrate are tungsten carbide-base hard
Alloy, the substrate of the cutter head 10 weld together with the knife handle 20；
The top surface 31 that the cutter head 10 has side 32 and is connected with the side 32, the cutter head 10 are equipped with opposite
In 12 blades 11 that the center of the top surface 31 is in emitting shape distribution, 12 blades 11 are extended to from the top surface 31
On the side 32, cutter groove 12 is equipped between every two adjacent blade 11.
The cutter head 10 and knife handle 20 are cylindrical；The top center region of the cutter head 10 is equipped with groove 13, described
Groove 13 is rounded.
In the shape of a spiral, the helical angle of the blade 11 is 28 ° to 12 blades 11.
The anterior angle of the cutter groove 12 is 10 °；
The anterior angle of the cutter groove 12 fathoms as 0.4mm.
The length of the cutter groove 12 is 7mm.
The depth of the cutter groove 12 is 2mm.
The tread of the blade 11 is 0.7mm.
The surface roughness Ra of the blade 11 is 0.1 μm.
The shape of the blade 11 is trapezoidal.
Following table illustrates the milling cutter and existing welding type PCD profile cutter and hard alloy of the record of the embodiment of the present invention 3
The comparative situation of the performance test data of profile cutter.
It will be appreciated by those skilled in the art that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, module in attached drawing or
Process is not necessarily implemented necessary to the present invention.
It will be appreciated by those skilled in the art that the module in device in implement scene can be described according to implement scene into
Row is distributed in the device of implement scene, can also be carried out corresponding change and is located at the one or more dresses for being different from this implement scene
In setting.The module of above-mentioned implement scene can be merged into a module, can also be further split into multiple submodule.
The foregoing is merely preferable implementation examples of the invention, are not intended to limit the invention, all of the invention
Within spirit and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of milling cutter, which is characterized in that including cutter head and the knife handle being fixedly connected with the cutter head, the cutter head includes base
Bottom and the polycrystalline diamond layer in the substrate；The knife handle and the material of the substrate are hard alloy, described
Substrate welds together with the knife handle；
The top surface that the cutter head has side and is connected with the side, the cutter head are equipped with relative in the top surface
The heart is in 9-12 blade of emitting shape distribution, and the 9-12 blade extends on the side from the top surface, every two
Cutter groove is equipped between adjacent blade.
2. milling cutter as described in claim 1, which is characterized in that the length of the cutter groove is 3mm-7mm；The depth of the cutter groove
For 1mm-2mm.
3. milling cutter as described in claim 1, which is characterized in that the tread of the blade is 0.1mm-0.8mm.
4. milling cutter as described in claim 1, which is characterized in that the surface roughness Ra of the blade is 0.1 μm -0.4 μm.
5. milling cutter as described in claim 1, which is characterized in that the 9-12 blade in the shape of a spiral, the spiral shell of the blade
Swing angle is 15 ° -30 °.
6. milling cutter as described in claim 1, which is characterized in that the anterior angle of the cutter groove is 2 ° -10 °.
7. milling cutter as described in claim 1, which is characterized in that the shape of the blade is triangle or trapezoidal.
8. milling cutter as described in claim 1, which is characterized in that the cutter head and knife handle are cylindrical.
9. milling cutter as described in claim 1, which is characterized in that the hard alloy is tungsten carbide base carbide alloy.
10. milling cutter as described in claim 1, which is characterized in that the top center region of the cutter head is equipped with groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811120278.7A CN108943438A (en) | 2018-09-25 | 2018-09-25 | Milling cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811120278.7A CN108943438A (en) | 2018-09-25 | 2018-09-25 | Milling cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108943438A true CN108943438A (en) | 2018-12-07 |
Family
ID=64472403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811120278.7A Withdrawn CN108943438A (en) | 2018-09-25 | 2018-09-25 | Milling cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108943438A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020063006A1 (en) * | 2018-09-25 | 2020-04-02 | 汇专科技集团股份有限公司 | Diamond cutting tool for hard-brittle difficult-to-machine material |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4033204A (en) * | 1975-08-12 | 1977-07-05 | Viktor Samsonovich Salukvadze | Method of making rotary cutters |
| CN101622097A (en) * | 2007-01-23 | 2010-01-06 | 劳斯莱斯有限公司 | Make the method for milling cutter |
| CN201470965U (en) * | 2009-09-14 | 2010-05-19 | 哈尔滨飞机工业集团有限责任公司 | Organic glass milling tools |
| CN104640658A (en) * | 2012-07-27 | 2015-05-20 | 日立工具股份有限公司 | Multi-edge end mill |
| CN107738077A (en) * | 2017-11-14 | 2018-02-27 | 富耐克超硬材料股份有限公司 | Whole PC BN circular rod-shaped cutting tools and preparation method thereof |
| CN107891173A (en) * | 2017-11-14 | 2018-04-10 | 富耐克超硬材料股份有限公司 | Whole PC D circular rod-shaped cutting tools and preparation method thereof |
-
2018
- 2018-09-25 CN CN201811120278.7A patent/CN108943438A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4033204A (en) * | 1975-08-12 | 1977-07-05 | Viktor Samsonovich Salukvadze | Method of making rotary cutters |
| CN101622097A (en) * | 2007-01-23 | 2010-01-06 | 劳斯莱斯有限公司 | Make the method for milling cutter |
| CN201470965U (en) * | 2009-09-14 | 2010-05-19 | 哈尔滨飞机工业集团有限责任公司 | Organic glass milling tools |
| CN104640658A (en) * | 2012-07-27 | 2015-05-20 | 日立工具股份有限公司 | Multi-edge end mill |
| CN107738077A (en) * | 2017-11-14 | 2018-02-27 | 富耐克超硬材料股份有限公司 | Whole PC BN circular rod-shaped cutting tools and preparation method thereof |
| CN107891173A (en) * | 2017-11-14 | 2018-04-10 | 富耐克超硬材料股份有限公司 | Whole PC D circular rod-shaped cutting tools and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020063006A1 (en) * | 2018-09-25 | 2020-04-02 | 汇专科技集团股份有限公司 | Diamond cutting tool for hard-brittle difficult-to-machine material |
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| CB02 | Change of applicant information |
Address after: 510000 Guangdong Guangzhou High-tech Industrial Development Zone Science City Nanyun No. 2 Road No. 8 Product Yao Electronics Industry Park Door and Machine Building (Block C) First and Second Floors Applicant after: CONPROFE TECHNOLOGY GROUP Co.,Ltd. Applicant after: CONPROFE GREEN TOOLS Co.,Ltd. Address before: 510000 Guangdong Guangzhou High-tech Industrial Development Zone Science City Nanyun No. 2 Road No. 8 Product Yao Electronics Industry Park Door and Machine Building (Block C) First and Second Floors Applicant before: CONPROFE TECHNOLOGY GROUP Co.,Ltd. Applicant before: GUANGZHOU HUIZHUAN TOOLS Co.,Ltd. |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181207 |
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| WW01 | Invention patent application withdrawn after publication |