CN102615326B - Milling cutter for processing flexible board and forming process thereof - Google Patents
Milling cutter for processing flexible board and forming process thereof Download PDFInfo
- Publication number
- CN102615326B CN102615326B CN201210095079.1A CN201210095079A CN102615326B CN 102615326 B CN102615326 B CN 102615326B CN 201210095079 A CN201210095079 A CN 201210095079A CN 102615326 B CN102615326 B CN 102615326B
- Authority
- CN
- China
- Prior art keywords
- milling cutter
- end tooth
- cutter head
- angle
- described milling
- 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.)
- Active
Links
Abstract
The invention discloses a milling cutter for processing a flexible board and a forming process thereof. The milling cutter comprises a cutter shank (1), wherein one end of the cutter shank (1) extends to form a milling cutter head (2), two spiral grooves (3) in the same encirclement direction are formed on the surface of the milling cutter head (2) for forming a milling blade, and a V-port cutting surface is arranged at the tail end of the milling cutter head (2); and the angles omega of the spiral angles of the spiral grooves (3) are 28-32 degrees. The invention simultaneously discloses a forming process of the milling cutter for processing the flexible board. The milling cutter can solve the problems of poor rigidity and poor cutting performance of the existing milling cutter for processing a flexible circuit board and is particularly suitable for processing aluminum base boards, copper base boards, the flexible boards, Teflon boards, polytetrafluoroethylene boards and other boards.
Description
Technical field
The invention belongs to Design Milling and manufacture field, particularly a kind of milling cutter for processing flexibility plate.
background technology
Traditional printed wiring board is mainly made up of Copper Foil, glass fibre, epoxy resin and relevant inserts etc., and sheet material hard wear resistant, adds man-hour, use the processing of water chestnut tooth milling cutter, wooden partition is smooth, and chip removal is smooth and easy, and this is because the chip breaking design of water chestnut tooth milling cutter reaches above-mentioned superperformance.But now, printed wiring board is gradually by soft substrate plate material substitutions such as aluminium bases, this sheet material is not containing glass fibre, mainly formed by Copper Foil, insulating materials, aluminium sheet, machining sheet is softer, if chip-breaker and the flat milling cutter of common 2 sword that before also using, PCB machining uses, add be difficult for forming chip breaking man-hour and be more easily attached to cutting blade form long-pending cut knurl and make rapidly to cut ecological deterioration cause normally chip removal, cause and be cut wooden partition " crude ", cannot meet the requirements of dimensional accuracy and roughness.
For solving the problems such as the sticky bits of slotting cutter easy blade when the processing aluminum materials, chip removal are not smooth, Chinese patent document CN20151979U discloses a kind of aluminium fine machining vertical milling cutter, and it is taked that several cutters tooth and chip area are to 45 ° of-50 ° of helical angles and is arranged on cutter hub.Be easy to advantage thereby there is chip removal, but this type cutter is mainly for the aluminium in technology processing, therefore ensure the sharpness of processing by being greater than the parameters such as the above helical angle of 40 degree and large anterior angle.But for printed wiring board, thickness of slab is generally in 1.6mm, self intensity can not be born excessive upwards component, and excessive helical angle can cause adding and produces larger component (being commonly called as uplift force) upwards vertically man-hour during due to Tool in Milling and cause in wiring board process excessively warpage.
For solving the processing problems of flexible printed circuit board, Chinese patent CN 201931113 U disclose a kind of milling cutter for flexible printed circuit board processing.This milling cutter comprises handle of a knife, one end of described handle of a knife extends into milling cutter head, described milling cutter head is distributed with helical groove around, the helical angle of described helical groove is 15 °-32 °, all rake angles of described helical groove are 15 °-35 °, and helical angle and anterior angle design, make to cut sharp, cutting stress is little, reduces flexible sheet distortion.But this milling cutter is single-blade milling cutter, rigidity is very poor, and it can only be suitable for for the flexible resin plate in printed wiring board, and has comparatively speaking slightly high-intensity sheet material for aluminium base etc., adds man-hour easily because of rigidity deficiency breaking.
Summary of the invention
For this reason, technical problem to be solved by this invention is the poor problem of milling cutter poor rigidity cutting ability of existing processing flexibility wiring board, and then provides a kind of rigidity better, and working (machining) efficiency is high, durability is strong, accurate to dimension and the measured milling cutter of edges of boards matter and moulding process thereof.
For solving the problems of the technologies described above, milling cutter for processing flexibility plate of the present invention, it comprises handle of a knife, one end of described handle of a knife extends into milling cutter head, the surface forming of described milling cutter head has two to form milling edge around the identical helicla flute of direction, and the end of described milling cutter head is provided with the cutting face of V mouth; The angle ω of described spiral fluted helical angle is 28-32 °.
In above-mentioned milling cutter, the external diameter φ d of described milling cutter head is 0.4-3.175mm, and the core circular diameter φ K of described milling cutter head is 50% of described milling cutter head external diameter φ d.
In above-mentioned milling cutter, described milling cutter forms both-end tooth, and one of them end tooth relief angle α 1 is 13-17 °, and another end tooth relief angle α 2 is 29-31 °.
In above-mentioned milling cutter, all rake angle γ of described milling cutter are 4-8 °, and the end tooth anterior angle γ 1 of described milling cutter is 4-8 °.
In above-mentioned milling cutter, the distance e that end tooth one sword of described milling cutter is crossed center is 3% of described milling cutter head external diameter φ d.
In above-mentioned milling cutter, the end tooth of described milling cutter is Closed grooved, and the land f length of its formation is 5% of described milling cutter head external diameter φ d.
In above-mentioned milling cutter, described milling cutter in the short sword direction of end tooth one of moulding for eliminating the groove of chisel edge.Due to milling cutter at its end tooth center because core is thick and the reason of end tooth relief angle has the generation of chisel edge, and chisel edge is large negative rake in the time of milling, this is totally unfavorable for the milling condition that adds milling cutter in man-hour, thereby a part that uses a slice emery wheel to grind off end tooth sword forms groove, eliminate too much chisel edge part, improve milling condition.
The present invention discloses a kind of moulding process of the milling cutter for processing flexibility plate simultaneously, comprises the following steps,
A. grinding of milling handle: the bar of selected material, after corase grind-half fine grinding-fine grinding, is machined to 3.175-0.001/-0.005mm, polishes smooth;
B. determine length and the end-beveling of milling cutter head;
C. the mill of milling cutter head is cut: milling cutter head is milled to after given size, carries out the thick essence of spiral fluted and be cut into type under same clamping condition;
D. the polishing of end tooth angle and grooved: the cutting face of milling cutter head end is processed to end tooth angle and grooved under same clamping condition;
E. clean, check.
In above-mentioned moulding process, in step a, described corase grind is that the external diameter of described handle of a knife is polished to 3.20+0.01/0mm, and described half fine grinding is that the external diameter of described handle of a knife is polished to 3.180+0.005/0mm, and described fine grinding is that the external diameter of described handle of a knife is polished to 3.175-0.001/-0.005.
In above-mentioned moulding process, the end tooth angle described in steps d comprises end tooth anterior angle, end tooth relief angle and all rake angles; Described grooved is Closed grooved.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) milling cutter of the present invention, mainly be applicable to the processing of the sheet materials such as aluminium base, copper base, flexible board, Teflon plate, polyfluortetraethylene plate, be particularly suitable for the processing for aluminium base, copper base, the surface forming of milling cutter head has two to form milling edge around the identical helicla flute of direction, compares the milling cutter of existing processing relative flexibility wiring board, and rigidity is better, working (machining) efficiency is high, durability is strong, and helicla flute angle is between 28-32 °, and when guarantee cutting is sharp, chip removal is smooth and easy in time.
(2) the core circular diameter of this milling cutter head is 50% of milling cutter head external diameter, and it can, in ensureing cutter hub intensity, increase chip pocket volume effectively, can ensure that chip removal is smooth and easy in time, and the heat while reducing milling, improves service life and milling quality.
(3) this milling cutter forms both-end tooth, and one of them end tooth relief angle is 13-17 °, and another end tooth relief angle is 29-31 °, can obtain best bottom land roughness and less milling drag when angular dimensions makes milling blind hole blind slot after the end tooth of above-mentioned optimization.
(4) to cross the distance at center be 3% of milling cutter head external diameter to end tooth one sword of this milling cutter.Axial force when this parameter designing can reduce to be milled into also obtains smooth bottom land plane in the time of milling blind hole blind slot, uses emery wheel along short sharpening one groove of end tooth simultaneously, eliminates chisel edge, reduces cutting resistance while making end tooth milling.
(5) tooth leaves 5% the land f that length is milling cutter head external diameter this milling cutter week, and does the clear limit of relief grinding, in ensureing that milling is sharp, strengthens the intensity of cutting edge, extends cutter life.
(6) while processing this milling cutter, when doing milling cutter head and cutting operation, CNCNP5 type 6 axle 4 interlocking equipments that use Rollomatic company of Switzerland to produce are processed and one-shot forming, CNC628 Smartgrinding 6 axle 5 interlocking equipments of selecting Rollomatic company of Switzerland to produce carry out processing the one-shot forming of grooved and end tooth, in process route before having avoided, need to cook corase grind blade and partly refine two work steps of blade completing repeatedly the error that clamping brings, improved production efficiency simultaneously.
Brief description of the drawings
For content of the present invention is more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the structural representation of the milling cutter for processing flexibility plate of the present invention;
Fig. 2 is that the A-A of Fig. 1 is to cutaway view;
Fig. 3 is that the B of Fig. 1 is to view.
In figure, Reference numeral is expressed as: 1-handle of a knife, 2-milling cutter head, 3-helicla flute, 4-groove.
Detailed description of the invention
Below with reference to accompanying drawing, use following examples to be further elaborated the present invention.
embodiment 1
Figure 1 shows that the milling cutter for processing flexibility plate of the present invention, it comprises handle of a knife 1, one end of described handle of a knife 1 extends into milling cutter head 2, the surface forming of described milling cutter head 2 has two to form milling edge around the identical helicla flute 3 of direction, and the end of described milling cutter head 2 is provided with the cutting face of V mouth; The angle ω of the helical angle of described helicla flute 3 is 30 °.
The external diameter φ D of described handle of a knife 1 is 3.175mm, and the external diameter φ d of described milling cutter head 2 is 1.8 mm, and the core circular diameter φ K of described milling cutter head 2 is 50% of described milling cutter head 2 external diameter φ d, i.e. 0.9mm.
Fig. 2 is along dissecing the A-A obtaining to view perpendicular to the edge direction of described milling cutter head, can be found out by this view, and described milling cutter forms both-end tooth, and one of them end tooth relief angle α 1 is 15 °, and another end tooth relief angle α 2 is 30 °.The end tooth anterior angle γ 1 of described milling cutter is 6 °.
Be illustrated in figure 3 the end tooth of described milling cutter, wherein, the distance e that end tooth one sword of described milling cutter is crossed center is 3%=0.054mm of described milling cutter head 2 external diameter φ d.All rake angle γ of described milling cutter are 6 °.
The end tooth of described milling cutter is Closed grooved, and the land f length of its formation is 5% of described milling cutter head 2 external diameter φ d, i.e. 0.09mm.Closed grooved of the present invention, it is a proprietary trench structure of processing wiring board milling cutter, its end tooth that refers to described milling cutter has one and exceeds the land on limit clearly, and the advantage of this grooved is that after all teeth, knife face is lower than cutting edge, thereby the drag adding after man-hour when knife face is to milling can be little.Shortcoming is too high to crushing shape and graded width requirement for ensureing margin width.
Described milling cutter in the short sword direction of end tooth one of moulding for eliminating the groove 4 of chisel edge.
The moulding process of the above-mentioned milling cutter for processing flexibility plate, it comprises the following steps:
A. grinding of milling handle: the bar of selected material, after corase grind-half fine grinding-fine grinding, is machined to 3.175-0.001/-0.005mm, polishes smooth.Wherein, described corase grind is that the external diameter of described handle of a knife is polished to 3.20+0.01/0mm, and described half fine grinding is that the external diameter of described handle of a knife is polished to 3.180+0.005/0mm, and described fine grinding is that the external diameter of described handle of a knife is polished to 3.175-0.001/-0.005.
B. determine length and the end-beveling of milling cutter head;
C. the mill of milling cutter head is cut: milling cutter head is milled to after given size, carries out the thick essence of spiral fluted and be cut into type under same clamping condition;
D. the polishing of end tooth angle and grooved: the cutting face of milling cutter head end is processed to end tooth angle and grooved under same clamping condition.Wherein, described end tooth angle comprises end tooth anterior angle, end tooth relief angle, all rake angles, and described grooved is Closed grooved.
E. clean, check.
K44UF Ultra-fine (Ultra-fine) Hardmetal materials that described milling cutter selects German Kang Nade company to produce.Grain size is below 0.4 micron, and WC content is that 88%, Co content is 12%, and bending strength is 4500Nm, and hardness reaches HRA92.5(HV30=1730), ensureing that high cutting hardness simultaneously, has again good bending strength.
When milling cutter head cuts operation, CNCNP5 type 6 axle 4 interlocking equipments that use Rollomatic company of Switzerland to produce are processed and one-shot forming, CNC628 Smartgrinding 6 axle 5 interlocking equipments of selecting Rollomatic company of Switzerland to produce carry out processing the one-shot forming of grooved and end tooth, in process route before having avoided, need to cook corase grind blade and partly refine two work steps of blade completing repeatedly the error that clamping brings, improved production efficiency simultaneously.
embodiment 2
The milling cutter embodiment 1 for processing flexibility plate of the present embodiment is basic identical, and its distinctive points is:
The angle ω of the helical angle of described helicla flute 3 is 32 °.Described milling cutter forms both-end tooth, and one of them end tooth relief angle α 1 is 13 °, and another end tooth relief angle α 2 is 29 °.All rake angle γ of described milling cutter are 4 °.The end tooth anterior angle γ 1 of described milling cutter is 4 °.The external diameter φ D of described handle of a knife is 3.175mm, and the external diameter φ d of described milling cutter head 2 is 0.4mm.The core circular diameter φ K of described milling cutter head 2 is 0.20mm.The distance e that end tooth one sword of described milling cutter is crossed center is 0.02mm.The end tooth of described milling cutter is Closed grooved, and the land f width of its formation is 0.02mm.
embodiment 3
The milling cutter embodiment 1 for processing flexibility plate of the present embodiment is basic identical, and its distinctive points is:
The angle ω of the helical angle of described helicla flute 3 is 28 °.Described milling cutter forms both-end tooth, and one of them end tooth relief angle α 1 is 17 °, and another end tooth relief angle α 2 is 31 °.All rake angle γ of described milling cutter are 8 °.The end tooth anterior angle γ 1 of described milling cutter is 8 °.The external diameter φ D of described handle of a knife is 3.175mm, and the external diameter φ d of described milling cutter head 2 is 3.175mm.The core circular diameter φ K of described milling cutter head 2 is 1.59mm.The distance e that end tooth one sword of described milling cutter is crossed center is 0.09mm.The end tooth of described milling cutter is Closed grooved, and the land f width of its formation is 0.16mm.
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all embodiments.And the apparent variation of being extended out thus or variation are still among the protection domain in the invention.
Claims (5)
1. the milling cutter for processing flexibility plate, it is characterized in that: it comprises handle of a knife (1), one end of described handle of a knife (1) extends into milling cutter head (2), the surface forming of described milling cutter head (2) has two to form milling edge around the identical helicla flute of direction (3), and the end of described milling cutter head (2) is provided with the cutting face of V mouth; The angle (ω) of the helical angle of described helicla flute (3) is 28-32 °, all rake angles (γ) of described milling cutter are 4-8 °, the end tooth anterior angle (γ 1) of described milling cutter is 4-8 °, and the distance (e) that end tooth one sword of described milling cutter is crossed center is described milling cutter head (2) external diameter
3%.
2. the milling cutter for processing flexibility plate according to claim 1, is characterized in that:
The external diameter of described milling cutter head (2)
for 0.4-3.175mm, its core circular diameter
for described milling cutter head (2) external diameter
50%.
3. the milling cutter for processing flexibility plate according to claim 1 and 2, is characterized in that:
Described milling cutter forms both-end tooth, and one of them end tooth relief angle (α 1) is 13-17 °, and another end tooth relief angle (α 2) is 29-31 °.
4. the milling cutter for processing flexibility plate according to claim 3, is characterized in that:
The end tooth of described milling cutter is Closed grooved, and land (f) length of its formation is described milling cutter head (2) external diameter
5%.
5. the milling cutter for processing flexibility plate according to claim 4, is characterized in that:
Described milling cutter in the short sword direction of end tooth one of moulding for eliminating the groove (4) of chisel edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210095079.1A CN102615326B (en) | 2012-03-31 | 2012-03-31 | Milling cutter for processing flexible board and forming process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210095079.1A CN102615326B (en) | 2012-03-31 | 2012-03-31 | Milling cutter for processing flexible board and forming process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102615326A CN102615326A (en) | 2012-08-01 |
| CN102615326B true CN102615326B (en) | 2014-11-12 |
Family
ID=46555725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210095079.1A Active CN102615326B (en) | 2012-03-31 | 2012-03-31 | Milling cutter for processing flexible board and forming process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102615326B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567520A (en) * | 2012-08-09 | 2014-02-12 | 上海工程技术大学 | Blind groove diamond coating milling cutter |
| CN103084935B (en) * | 2012-12-19 | 2015-02-18 | 西南铝业（集团）有限责任公司 | Grinding method for milling cutter degrees |
| CN112238259A (en) * | 2019-07-18 | 2021-01-19 | 上海波肯实业有限公司 | Method for processing end face of plastic-dipped part |
| CN114273877B (en) * | 2021-12-24 | 2023-04-25 | 南阳鼎泰高科有限公司 | PCB micro-drill handle processing technique |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2377329A (en) * | 1944-04-01 | 1945-06-05 | Weldon Tool Co | End mill |
| US5049009A (en) * | 1990-08-21 | 1991-09-17 | The Weldon Tool Company | Improved cutting tool |
| CN1328891A (en) * | 2000-05-30 | 2002-01-02 | 三菱综合材料株式会社 | Replaceable cutter blade and replaceable cutter |
| CN1953832A (en) * | 2004-05-28 | 2007-04-25 | 钴碳化钨硬质合金公司 | Drill, particularly a spiral drill |
| CN201324865Y (en) * | 2008-12-22 | 2009-10-14 | 中山市东泓硬质合金刀具有限公司 | Double-edged milling cutter |
| CN101708580A (en) * | 2009-12-09 | 2010-05-19 | 苏州富莱克精密工具有限公司 | Process for machining drill bit or milling cutter |
| CN102009216A (en) * | 2010-12-14 | 2011-04-13 | 株洲钻石切削刀具股份有限公司 | End milling cutter for processing nonferrous metal |
| CN202639455U (en) * | 2012-03-31 | 2013-01-02 | 浙江瑞亨精密工具有限公司 | Milling cutter used for machining flexible board |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3270999B2 (en) * | 1997-04-18 | 2002-04-02 | 日立ツール株式会社 | Indexable end mill |
-
2012
- 2012-03-31 CN CN201210095079.1A patent/CN102615326B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2377329A (en) * | 1944-04-01 | 1945-06-05 | Weldon Tool Co | End mill |
| US5049009A (en) * | 1990-08-21 | 1991-09-17 | The Weldon Tool Company | Improved cutting tool |
| CN1328891A (en) * | 2000-05-30 | 2002-01-02 | 三菱综合材料株式会社 | Replaceable cutter blade and replaceable cutter |
| CN1953832A (en) * | 2004-05-28 | 2007-04-25 | 钴碳化钨硬质合金公司 | Drill, particularly a spiral drill |
| CN201324865Y (en) * | 2008-12-22 | 2009-10-14 | 中山市东泓硬质合金刀具有限公司 | Double-edged milling cutter |
| CN101708580A (en) * | 2009-12-09 | 2010-05-19 | 苏州富莱克精密工具有限公司 | Process for machining drill bit or milling cutter |
| CN102009216A (en) * | 2010-12-14 | 2011-04-13 | 株洲钻石切削刀具股份有限公司 | End milling cutter for processing nonferrous metal |
| CN202639455U (en) * | 2012-03-31 | 2013-01-02 | 浙江瑞亨精密工具有限公司 | Milling cutter used for machining flexible board |
Non-Patent Citations (4)
| Title |
|---|
| 徐其军 等.整体硬质合金立铣刀槽形设计和生产.《江西冶金》.2006,第26卷(第4期), * |
| 整体硬质合金立铣刀槽形设计和生产;徐其军 等;《江西冶金》;20060831;第26卷(第4期);第14-17页 * |
| 整体硬质合金螺旋木工立铣刀的设计及加工工艺;文志民;《林业机械与木工设备》;20100430;第38卷(第4期);第40-42页 * |
| 文志民.整体硬质合金螺旋木工立铣刀的设计及加工工艺.《林业机械与木工设备》.2010,第38卷(第4期), * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102615326A (en) | 2012-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102615326B (en) | Milling cutter for processing flexible board and forming process thereof | |
| KR20060105746A (en) | Cutting insert for high feed face milling | |
| CN104816028A (en) | Process for strengthening milling rigidity of aluminum-alloy ultrathin-blade integral impeller | |
| CN109014258A (en) | One kind being used for the semi-finished indexable turning blade of titanium alloy | |
| CN102601437B (en) | Milling cutter for processing flexible board | |
| JP2016163910A (en) | Cutting insert, tool body and cutting tool | |
| CN202639455U (en) | Milling cutter used for machining flexible board | |
| CN202539659U (en) | Milling cutter for processing flexible boards | |
| CN202045395U (en) | Milling cutter of chip breaker groove for machining printed circuit board | |
| CN104889467B (en) | A kind of cylindrical cutter head wire rod quality of milling edge position-adjustable | |
| WO2020063006A1 (en) | Diamond cutting tool for hard-brittle difficult-to-machine material | |
| CN202427979U (en) | Boring cutter for welding polycrystalline diamond | |
| CN104416229B (en) | PCD saw blades and preparation method thereof | |
| CN201862837U (en) | Milling cutter blade with wearing groove and radiating strips | |
| CN208825653U (en) | Double-pole Slot shaping angle cutting tool | |
| CN106346030B (en) | A kind of bicircular arcs turning insert | |
| CN203018812U (en) | Integral four-blade rough refined milling cutter | |
| CN111390258A (en) | Milling cutter | |
| CN216096607U (en) | Spiral finger-shaped milling cutter with conveniently replaced blade | |
| CN215880158U (en) | double-R-angle cutting edge reamer for machining high-requirement holes | |
| CN212551931U (en) | Strong ball-end cutting tool | |
| CN215903676U (en) | Large axial angle double-section type woodworking spiral shank milling cutter | |
| CN210099056U (en) | Rough and fine integrated three-edge flat cutter for aluminum | |
| CN204397022U (en) | PCD roughing feed antivibration milling cutter | |
| CN108746683A (en) | A kind of indexable turning blade for cutting high temperature alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211118 Address after: 325612 Furong Town Industrial Zone, Yueqing City, Wenzhou City, Zhejiang Province Patentee after: ZHEJIANG DEWEI CEMENTED CARBIDE MANUFACTURING Co.,Ltd. Address before: 325600 No. 3, jingsan Road, Yueqing Central Industrial Park, Wenzhou, Zhejiang Patentee before: ZHEJIANG RICHVERTEX PRECISION TOOLS Co.,Ltd. |
|
| TR01 | Transfer of patent right |