CN103088268B - The preparation method of fastening bolt used for automobile wheels - Google Patents
The preparation method of fastening bolt used for automobile wheels Download PDFInfo
- Publication number
- CN103088268B CN103088268B CN201210511900.3A CN201210511900A CN103088268B CN 103088268 B CN103088268 B CN 103088268B CN 201210511900 A CN201210511900 A CN 201210511900A CN 103088268 B CN103088268 B CN 103088268B
- Authority
- CN
- China
- Prior art keywords
- bolt
- bar material
- parts
- wire diameter
- preparation
- 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
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000005266 casting Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 5
- 238000005554 pickling Methods 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims abstract description 4
- 238000010791 quenching Methods 0.000 claims description 15
- 230000000171 quenching effect Effects 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000005496 tempering Methods 0.000 claims description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 8
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 239000002173 cutting fluid Substances 0.000 claims description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- MFXMOUUKFMDYLM-UHFFFAOYSA-L zinc;dihydrogen phosphate Chemical compound [Zn+2].OP(O)([O-])=O.OP(O)([O-])=O MFXMOUUKFMDYLM-UHFFFAOYSA-L 0.000 claims description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000000641 cold extrusion Methods 0.000 abstract description 2
- 230000003111 delayed effect Effects 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 210000000981 epithelium Anatomy 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The invention discloses a kind of preparation method of fastening bolt used for automobile wheels, procedure of processing comprises: a, casting bar material, control its chemical composition content percentage as follows: C? 0.27～0.34, Mn? 0.45～0.65, V? 0.05-0.15, Si? 0.15～0.35, W? 0.01-0.04, P≤0.025, S≤0.025, Ni? 1.55～2.00, Cr? 0.65～0.95, Mo? 0.20～0.30, Cu≤0.20; B, bar material after casting do pickling processes; According to the wire diameter requirement of bolt, it is taken out to line, so that described bar material is retracted to the required wire diameter of bolt; The bar material shrinking after wire diameter is cut to the required length of bolt, at normal temperatures the bar material after cutting off is put into mold cavity, make bar material form required head and the bar portion size of bolt with upset force. The preparation method of fastening bolt used for automobile wheels of the present invention, adopt the processing of cold-extrusion technology bolt, improve the intensity of bolt, reach required hardness number, the intensity level of 12.9 high-strength bolts, solve delayed fracture and the fatigue fracture of bolt under high strength, in use connected reliably not frangibility, improve bolt life, met the user demand of social upper every profession and trade to high-strength bolt.
Description
Technical field
The present invention relates to the processing method of bolt, especially a kind of preparation method of fastening bolt used for automobile wheels.
Background technology
Fastening bolt used for automobile wheels is securing member conventional in machinery industry, and current processing mode is generally the moulding of turning, and intensity is often difficult to ensure, the dangerous phenomenons such as in use generation is sometimes turned around, the fracture of bar portion are very large to industrial production harm. Therefore high-strength bolt production method is studied and improved, guaranteed the quality stability of high-strength bolt, technology and expanding economy are had to important function. In addition, bolt is in relatively moist environment time, and the corrosion that gets rusty easily, finally causes rupturing or crackle, forms potential accident source.
Given this, be necessary to provide a kind of fastening bolt used for automobile wheels, produce more corrosion resistant high-strength bolt.
Summary of the invention
The object of the invention is to avoid weak point of the prior art, and a kind of preparation method of fastening bolt used for automobile wheels is provided.
Object of the present invention is as follows by the following technical programs:
The preparation method of fastening bolt used for automobile wheels, procedure of processing comprises:
A, casting bar material, the percentage by weight of each chemical composition of control lever material should meet following requirement: C0.27～0.34, Mn0.45～0.65, V0.05-0.15, Si0.15～0.35, W0.01-0.04, P≤0.025, S≤0.025, Ni1.55～2.00, Cr0.65～0.95, Mo0.20～0.30, Cu≤0.20;
B, bar material after casting do pickling processes; According to the wire diameter requirement of bolt, it is taken out to line, so that described bar material is retracted to the required wire diameter of bolt; The bar material shrinking after wire diameter is cut to the required length of bolt, at normal temperatures the bar material after cutting off is put into mold cavity, make bar material form required head and the bar portion size of bolt with upset force; Utilize fine turning lathe to form screw thread in the outer peripheral face turning of bar material bar portion, the cutter on lathe is Sintox, and the operating rate of lathe tool ensures at 3300-3500r.P.M, and starts feed by the relative one end of disc head portions, cutting fluid employing water-base cutting fluid;
C, heat treatment
Reciprocating tooth roller is rolled over to the bolt external screw thread of making type at 940 DEG C ± 10 DEG C, quench with quenching oil, again the bolt after quenching is carried out to tempering at 500 DEG C, 100 minutes duration, by the polished rod section of bolt at 800 DEG C ± 20 DEG C, use quenching liquid quenches, again the bolt after quenching is carried out to tempering at 600 DEG C, 60 minutes duration, finally carry out Carburization Treatment, carburizer is sent in tempering furnace, Carburization Treatment 50～120min in 1100 °～1150 DEG C temperature ranges, described carburizer is by 30～50 parts of alundum (Al2O3) fine powders, 10～30 parts of granular graphites and carbonate or/and 30～50 parts of bicarbonates after being uniformly mixed, obtain,
D, phosphatization processing, it is to process 4-5min in the surface phosphorization treatment fluid of 100-120 DEG C that bolt after heat treatment is immersed to temperature, described surface phosphorization treatment fluid is by zinc dihydrogen phosphate: zinc nitrate: sodium carbonate: water forms, and its each composition weight proportioning is respectively: 11～20 parts, 15～30 parts, 5～10 parts, 200～300 parts;
E, blackening process
Bolt is carried out to blackening process, control 100 DEG C-110 DEG C of temperature; Time 25-30 minute; Clean again, air-dry, bolt gets product.
Described phosphatization processing, it is to process 4.5min in the surface phosphorization treatment fluid of 110 DEG C that bolt after heat treatment is immersed to temperature, surface phosphorization treatment fluid is by zinc dihydrogen phosphate: zinc nitrate: sodium carbonate: water forms, its each composition weight proportioning is respectively: 15 parts, 18 parts, 7 parts, 150 parts.
The preparation method of fastening bolt used for automobile wheels of the present invention, adopt the processing of cold-extrusion technology bolt, improve the intensity of bolt, reach required hardness number, the intensity level of 12.9 high-strength bolts, solve delayed fracture and the fatigue fracture of bolt under high strength, in use connected reliably not frangibility, improve bolt life, met the user demand of social upper every profession and trade to high-strength bolt.
Beneficial effect of the present invention is:
1, refinement of the present invention the shaping processing technology of material, make wire rod hardness moderate, surface has good phosphatization epithelium, greasy property is good, wire rod is without hydrogen embrittlement, plasticity is good;
2, bolt of the present invention has carried out 3-4 cold-heading extrusion modling, has improved high-strength bolt bulk strength, and bolt precision is high, and quality is good, and production efficiency is high, and without cutting, without waste material, unit cost declines greatly. Obtain bulk metal and flowed to the bolt that direction is consistent, greatly improved its tensile strength;
3, the invention of Technology for Heating Processing has broken through the limit of the alloy steel products of bolt prior heat treatment, the leading domestic Investment in fastener industry level of the characteristic of its super-strong and super-toughened property.
Detailed description of the invention
The invention will be further described with the following Examples:
The preparation method of fastening bolt used for automobile wheels, procedure of processing comprises:
A, casting bar material, the percentage by weight of each chemical composition of control lever material should meet following requirement: C0.27～0.34, Mn0.45～0.65, V0.05-0.15, Si0.15～0.35, W0.01-0.04, P≤0.025, S≤0.025, Ni1.55～2.00, Cr0.65～0.95, Mo0.20～0.30, Cu≤0.20;
B, bar material after casting do pickling processes; According to the wire diameter requirement of bolt, it is taken out to line, so that described bar material is retracted to the required wire diameter of bolt; The bar material shrinking after wire diameter is cut to the required length of bolt, at normal temperatures the bar material after cutting off is put into mold cavity, make bar material form required head and the bar portion size of bolt with upset force; Utilize fine turning lathe to form screw thread in the outer peripheral face turning of bar material bar portion, the cutter on lathe is Sintox, and the operating rate of lathe tool ensures at 3300-3500r.P.M, and starts feed by the relative one end of disc head portions, cutting fluid employing water-base cutting fluid;
C, heat treatment
Reciprocating tooth roller is rolled over to the bolt external screw thread of making type at 940 DEG C ± 10 DEG C, quench with quenching oil, again the bolt after quenching is carried out to tempering at 500 DEG C, 100 minutes duration, by the polished rod section of bolt at 800 DEG C ± 20 DEG C, use quenching liquid quenches, again the bolt after quenching is carried out to tempering at 600 DEG C, 60 minutes duration, finally carry out Carburization Treatment, carburizer is sent in tempering furnace, Carburization Treatment 50～120min in 1100 °～1150 DEG C temperature ranges, described carburizer is by 30～50 parts of alundum (Al2O3) fine powders, 10～30 parts of granular graphites and carbonate or/and 30～50 parts of bicarbonates after being uniformly mixed, obtain,
D, phosphatization processing, it is to process 4.5min in the surface phosphorization treatment fluid of 110 DEG C that bolt after heat treatment is immersed to temperature, surface phosphorization treatment fluid is by zinc dihydrogen phosphate: zinc nitrate: sodium carbonate: water forms, and its each composition weight proportioning is respectively: 15 parts, 18 parts, 7 parts, 150 parts;
E, blackening process
Bolt is carried out to blackening process, control 100 DEG C-110 DEG C of temperature; Time 25-30 minute; Clean again, air-dry, bolt gets product.
The bolt of producing according to the preparation method of fastening bolt used for automobile wheels of the present invention, as follows through detecting its mechanical performance numerical value of test, bolt centre hardness reaches 40-43HRC, tensile strength reaches 1230Mpa, yield strength reaches 1250Mpa, percentage elongation is greater than 10%, the contraction percentage of area is greater than 35%, and impact flexibility is greater than 60J/cm2, the high 10-12% of bolt that comprehensive mechanical performance produces than existing technique.
Finally should be noted that; above embodiment is only for illustrating technical scheme of the present invention but not limiting the scope of the invention; although the present invention is explained in detail with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement technical scheme of the present invention, and not depart from essence and the scope of technical solution of the present invention.
Claims (1)
1. the preparation method of fastening bolt used for automobile wheels, is characterized in that, procedure of processing comprises:
A, casting bar material, the percentage by weight of each chemical composition of control lever material should meet following requirement: C0.27～0.34, Mn0.45～0.65, V0.05-0.15, Si0.15～0.35, W0.01-0.04, P≤0.025, S≤0.025, Ni1.55～2.00, Cr0.65～0.95, Mo0.20～0.30, Cu≤0.20;
B, bar material after casting do pickling processes; According to the wire diameter requirement of bolt, it is taken out to line, so that described bar material is retracted to the required wire diameter of bolt; The bar material shrinking after wire diameter is cut to the required length of bolt, at normal temperatures the bar material after cutting off is put into mold cavity, make bar material form required head and the bar portion size of bolt with upset force; Utilize fine turning lathe to form screw thread in the outer peripheral face turning of bar material bar portion, the cutter on lathe is Sintox, and the operating rate of lathe tool ensures at 3300-3500r.p.m, and starts feed by the relative one end of disc head portions, cutting fluid employing water-base cutting fluid;
C, heat treatment by bolt at 940 DEG C ± 10 DEG C, quench with quenching oil, again the bolt after quenching is carried out to tempering at 500 DEG C, 100 minutes duration, by the polished rod section of bolt at 800 DEG C ± 20 DEG C, use quenching liquid quenches, again the bolt after quenching is carried out to tempering at 600 DEG C, 60 minutes duration, finally carry out Carburization Treatment, carburizer is sent in tempering furnace, Carburization Treatment 50～120min in 1100 DEG C～1150 DEG C temperature ranges, described carburizer is by 30～50 parts of alundum (Al2O3) fine powders, 10～30 parts of granular graphites and carbonate or/and 30～50 parts of bicarbonates after being uniformly mixed, obtain,
D, phosphatization processing, it is to process 4-5min in the surface phosphorization treatment fluid of 100-120 DEG C that bolt after heat treatment is immersed to temperature, described surface phosphorization treatment fluid is by zinc dihydrogen phosphate: zinc nitrate: sodium carbonate: water forms, and its each composition weight proportioning is respectively: 11～20 parts, 15～30 parts, 5～10 parts, 200～300 parts;
E, blackening process carry out blackening process to bolt, control 100 DEG C-110 DEG C of temperature; Time 25-30 minute; Clean again, air-dry, bolt gets product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210511900.3A CN103088268B (en) | 2012-12-04 | 2012-12-04 | The preparation method of fastening bolt used for automobile wheels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210511900.3A CN103088268B (en) | 2012-12-04 | 2012-12-04 | The preparation method of fastening bolt used for automobile wheels |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103088268A CN103088268A (en) | 2013-05-08 |
| CN103088268B true CN103088268B (en) | 2016-05-11 |
Family
ID=48201392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210511900.3A Active CN103088268B (en) | 2012-12-04 | 2012-12-04 | The preparation method of fastening bolt used for automobile wheels |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103088268B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103212957B (en) * | 2013-05-10 | 2016-02-03 | 江苏永昊高强度螺栓有限公司 | Processing method of high-strength bolts |
| CN103317313B (en) * | 2013-07-15 | 2017-02-08 | 鹏驰五金制品有限公司 | Automobile hub bolt and machining technology thereof |
| CN103522066B (en) * | 2013-10-12 | 2015-10-28 | 芜湖开瑞金属科技有限公司 | The automatic pier nose equipment of solid automobile suspension hook |
| CN103820726A (en) * | 2014-03-17 | 2014-05-28 | 河南赛诺米特种设备有限公司 | Method for manufacturing bolts with relatively high fatigue strength |
| CN105112792A (en) * | 2015-07-15 | 2015-12-02 | 江苏永昊高强度螺栓有限公司 | High-strength bolt |
| CN105112813A (en) * | 2015-07-15 | 2015-12-02 | 江苏永昊高强度螺栓有限公司 | Zinc-plating bolt |
| CN105149866A (en) * | 2015-07-16 | 2015-12-16 | 江苏永昊高强度螺栓有限公司 | Method for machining high-strength T-shaped bolt |
| CN105420588A (en) * | 2015-11-03 | 2016-03-23 | 合肥海源机械有限公司 | Preparation method of automobile hub fixed bolt |
| CN106282814A (en) * | 2016-08-15 | 2017-01-04 | 合肥万向钱潮汽车零部件有限公司 | A kind of anti abrasive automobile lathe |
| CN111842774A (en) * | 2020-07-29 | 2020-10-30 | 苏州畅利永紧固件有限公司 | Outer hexagonal cross bolt machining process |
| CN113279981A (en) * | 2021-05-25 | 2021-08-20 | 包兆平 | Centrifugal fan and machining method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1570185A (en) * | 2004-04-30 | 2005-01-26 | 石家庄铁道学院 | Shape memory alloy check nut and manufacturing technique |
| CN101890618A (en) * | 2010-06-17 | 2010-11-24 | 鹏驰五金制品有限公司 | Processing method of high-strength bolts |
| CN102260831A (en) * | 2011-07-08 | 2011-11-30 | 曾美霞 | Fastener, such as screw bolt, screw nut and the like made from high-strength steel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5167616B2 (en) * | 2005-10-31 | 2013-03-21 | Ｊｆｅスチール株式会社 | Metal bolts with excellent delayed fracture resistance |
-
2012
- 2012-12-04 CN CN201210511900.3A patent/CN103088268B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1570185A (en) * | 2004-04-30 | 2005-01-26 | 石家庄铁道学院 | Shape memory alloy check nut and manufacturing technique |
| CN101890618A (en) * | 2010-06-17 | 2010-11-24 | 鹏驰五金制品有限公司 | Processing method of high-strength bolts |
| CN102260831A (en) * | 2011-07-08 | 2011-11-30 | 曾美霞 | Fastener, such as screw bolt, screw nut and the like made from high-strength steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103088268A (en) | 2013-05-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103088268B (en) | The preparation method of fastening bolt used for automobile wheels | |
| CN103128506B (en) | The anti-preparation method of foot bolt yieldly | |
| CN101890618B (en) | Processing method of high-strength bolts | |
| CN103089781B (en) | Method for machining high-strength double end bolt | |
| CN103084532B (en) | Method for machining T-shaped bolt | |
| CN103205641A (en) | Preparation method for high-strength foundation bolt | |
| CN103088266B (en) | The forging method of foundation bolt | |
| CN103128505B (en) | The preparation method of high-strength steel cable bolt | |
| CN104400344A (en) | Bolt manufacturing technology | |
| CN103216509A (en) | High-strength bolt and processing method thereof | |
| CN103131948A (en) | Preparation method of high-strength T-shaped bolt | |
| CN103088267B (en) | The preparation method of Lengthened bolt | |
| CN103084798B (en) | high-strength bolt forging method | |
| CN103084523B (en) | High intensity U bolt processing method | |
| CN104400359A (en) | Method for preparing foundation bolts | |
| CN103028685B (en) | The processing method of high-grade bolt | |
| CN103088271B (en) | The preparation method of high-strength corrosion-resisting bolt | |
| CN103131954A (en) | Preparation method of fracture-resistant steel rope bolt | |
| CN103084525B (en) | The connecting-rod bolts processing method of diesel engine | |
| CN103131949A (en) | Preparation method of high-strength aluminum alloy flange bolt | |
| CN103084797B (en) | Crawler of excavator bolt forging method | |
| CN103133481B (en) | The preparation method of abrasion-resistant foundation bolt | |
| CN103084524B (en) | Flange bolt forging method | |
| CN103084533B (en) | Method for forging torsional shear type high-strength bolt | |
| CN103133485B (en) | The preparation method of wear-resistant U bolt |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160401 Address after: The road in Baohe District of Hefei city of Anhui Province, No. 208 230001 Applicant after: HEFEI ZHONGLAN NEW MATERIAL TECHNOLOGY CO., LTD. Address before: 241000 Anhui Province, Wuhu Yongchang City Jiujiang Road Development Zone No. 69 Applicant before: Anhui Liufang Zhonglian Mechanical Share Co.,Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yan Cunlu Inventor before: Wang Lixin |
|
| COR | Change of bibliographic data | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161118 Address after: 201300 Pudong New Area South Road, No. 168 Shanghai Patentee after: SHANGHAI AUTOCRAFT CO., LTD. Address before: The road in Baohe District of Hefei city of Anhui Province, No. 208 230001 Patentee before: HEFEI ZHONGLAN NEW MATERIAL TECHNOLOGY CO., LTD. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210312 Address after: 201499 1-2 / F, No.7 Lane 1088, Mingcheng Road, Fengxian District, Shanghai Patentee after: Shanghai Youqian Auto Parts Co.,Ltd. Address before: No. 168, Nanlu Road, Pudong New Area, Shanghai, 201300 Patentee before: Shanghai Autocraft Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210412 Address after: No. 619, Chudu Avenue, Yicheng Economic Development Zone, Xiangyang City, Hubei Province Patentee after: Hubei Youqian Auto Parts Co.,Ltd. Address before: 201499 1-2 / F, No.7 Lane 1088, Mingcheng Road, Fengxian District, Shanghai Patentee before: Shanghai Youqian Auto Parts Co.,Ltd. |