CN102275065B - Cold extruding forming process for automobile fastening decollation bolt - Google Patents
Cold extruding forming process for automobile fastening decollation bolt Download PDFInfo
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- CN102275065B CN102275065B CN 201110161458 CN201110161458A CN102275065B CN 102275065 B CN102275065 B CN 102275065B CN 201110161458 CN201110161458 CN 201110161458 CN 201110161458 A CN201110161458 A CN 201110161458A CN 102275065 B CN102275065 B CN 102275065B
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Abstract
The invention relates to a cold extruding forming process for an automobile fastening decollation bolt, which comprises the following steps of: (1) cutting a material; (2) performing cold heading formation on the cut material by using a cold heading apparatus, thereby forming the head portion, the middle portion and the tail portion of the bolt through three-die formation, and directly forming the head portion of the bolt through triple-punching formation; (3) directly forming a chute at the middle portion of the bolt by means of a die in a cold press moulding manner; and (4) performing thread rolling on the tail portion of the bolt. In the invention, the cold extruding forming process is directly added to perform groove cutting on the middle portion of the bolt after the cold heading formation, so that the chute formed in such a manner can be directly formed through the die; and the material is not needed to be further cut so that the material is saved.
Description
Technical field
The present invention relates to decollation bolt manufacturing technology field, particularly relate to a kind of cold extruding formation process for the fastening decollation bolt of automobile.
Background technology
In traditional automobile industry, the big and small bolt in the securing member is the most common, most common standard part, particularly decollation bolt, and use amount is very big.The manufacturing technology steps of existing decollation bolt is as follows: at first material is cut material, follow cold-heading molding, then bolt head is carried out trimming for forming (being hexagonal forming), again turning is carried out at the bolt middle part and formed recessing, at last bolt tail is carried out thread rolling and form screw thread.When bolt head being carried out trimming for forming and bolt middle part carried out turning, can produce a large amount of waste materials in the whole manufacturing process, thereby cause the waste of material to make cost improve.
Summary of the invention
Technical problem to be solved by this invention provides a kind of cold extruding formation process for the fastening decollation bolt of automobile, makes material can not cause waste.
The technical solution adopted for the present invention to solve the technical problems is: a kind of cold extruding formation process for the fastening decollation bolt of automobile is provided, may further comprise the steps:
(1) material is cut material;
(2) material that will cut utilizes cold-heading equipment to carry out cold-heading molding, and head, middle part and afterbody by three mold formings formation bolt are washed into the head that type directly forms bolt by three;
(3) utilize mould directly to form skewed slot at the bolt middle part by the mode of cold moudling;
(4) bolt tail is carried out thread rolling.
Described step (2) also comprises following substep:
(a) mold forming: the material that utilizes cold-heading equipment to cut is shaped to two sections continuous cylinders, wherein, as the cylindrical diameter at bolt head and middle part liken to into the cylindrical diameter of bolt tail big;
(b) two mold formings: the position of revising bolt head and middle part;
(c) three mold formings: the cylinder as bolt head and middle part after utilizing cold-heading equipment to a mold forming carries out moulding, make the cylinder as bolt head and middle part be divided into two sections cylinders that link to each other, wherein, as the cylindrical diameter of bolt head liken to into the cylindrical diameter at bolt middle part little;
(d) by three types that are washed into bolt head is carried out moulding.
Beneficial effect
Owing to adopted above-mentioned technical scheme, the present invention compared with prior art, have following advantage and good effect: the present invention directly increases cold extruding formation process groove is cut at the middle part of bolt behind cold-heading molding, the skewed slot of Xing Chenging can be need not material to be cut by the mould straight forming again like this, thereby has saved material, and adopt one-time formed mode to process, improve the efficient of producing greatly, and made product more stable, improved the quality of product.
Description of drawings
Fig. 1 is the present invention through a structural representation that is washed into behind the type;
Fig. 2 is the present invention through two structural representations that are washed into behind the type;
Fig. 3 is that the present invention is through the structural representation behind the cold-heading molding;
Fig. 4 is that the present invention is through the structural representation after the cold moudling;
Fig. 5 is that the present invention is through the structural representation after the thread rolling;
Used mould schematic diagram when Fig. 6 is the present invention's three mold formings;
Fig. 7 is the present invention three used mould schematic diagram when being washed into type;
Fig. 8 is used mould schematic diagram during cold moudling among the present invention.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used for explanation the present invention and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiments of the present invention relate to a kind of cold extruding formation process for the fastening decollation bolt of automobile, may further comprise the steps:
(1) material is cut material.
(2) material that will cut utilizes cold-heading equipment to carry out cold-heading molding, is washed into the head that type directly forms bolt by three.This three type of being washed into may further comprise the steps: (a) mold forming: the material that utilizes cold-heading equipment to cut is shaped to two sections continuous cylinders, wherein, liken cylindrical diameter big (as Fig. 1) into bolt tail to as the cylindrical diameter at bolt head and middle part; (b) two mold formings: the position of revising bolt head and middle part; (c) three mold formings: the cylinder as bolt head and middle part after utilizing cold-heading equipment to a mold forming carries out moulding, make the cylinder as bolt head and middle part be divided into two sections cylinders that link to each other, wherein, likening to as the cylindrical diameter of bolt head is the cylindrical diameter little (as Fig. 2) at bolt middle part, adopt mould as shown in Figure 6 that it is carried out moulding when carrying out three mold formings, this mould has been divided into three parts with bolt; (d) by three types that are washed into bolt head is carried out moulding (as Fig. 3), namely utilize the mould of cold-heading equipment by as shown in Figure 7 that bolt head is carried out moulding, among Fig. 7 mould be shaped as hexagonal diel, be washed into type through three after, bolt head can form hexagonal configuration.As shown in Figure 3, because to the bolt head straight forming, so need not bolt head is carried out trimming for forming, thus material saved.
(3) utilize mould as shown in Figure 8 directly to form skewed slot at the bolt middle part by the mode of cold moudling, mould among Fig. 8 is provided with the denation wedge angle, just can form skewed slot to the bolt middle part during moulding, as shown in Figure 4, because by the skewed slot straight forming of mould to the bolt middle part, need not by lathe it to be carried out turning, thereby saved material.
(4) bolt tail is carried out thread rolling, as shown in Figure 5.
Be not difficult to find, the present invention directly increases cold extruding formation process groove is cut at the middle part of bolt behind cold-heading molding, the skewed slot of Xing Chenging can be by the mould straight forming like this, need not again material to be cut, thereby saved material, and adopted one-time formed mode to process, improved the efficient of producing greatly, and make product more stable, improved the quality of product.
Claims (1)
1. a cold extruding formation process that is used for the fastening decollation bolt of automobile is characterized in that, may further comprise the steps:
(1) material is cut material;
(2) material that will cut utilizes cold-heading equipment to carry out cold-heading molding, forms head, middle part and the afterbody of bolt by three mold formings, is washed into the head that type directly forms bolt by three, and described three mold formings comprise following substep:
A) mold forming: the material that utilizes cold-heading equipment to cut is shaped to two sections continuous cylinders, wherein, as the cylindrical diameter at bolt head and middle part liken to into the cylindrical diameter of bolt tail big;
B) two mold formings: the position of revising bolt head and middle part;
C) three mold formings: the cylinder as bolt head and middle part after utilizing cold-heading equipment to a mold forming carries out moulding, make the cylinder as bolt head and middle part be divided into two sections cylinders that link to each other, wherein, as the cylindrical diameter of bolt head liken to into the cylindrical diameter at bolt middle part little;
D) by three types that are washed into bolt head is carried out moulding;
(3) utilize mould directly to form skewed slot at the bolt middle part by the mode of cold moudling;
(4) bolt tail is carried out thread rolling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110161458 CN102275065B (en) | 2011-06-15 | 2011-06-15 | Cold extruding forming process for automobile fastening decollation bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110161458 CN102275065B (en) | 2011-06-15 | 2011-06-15 | Cold extruding forming process for automobile fastening decollation bolt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102275065A CN102275065A (en) | 2011-12-14 |
| CN102275065B true CN102275065B (en) | 2013-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110161458 Active CN102275065B (en) | 2011-06-15 | 2011-06-15 | Cold extruding forming process for automobile fastening decollation bolt |
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| CN (1) | CN102275065B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104117624B (en) * | 2014-05-07 | 2017-04-19 | 卓越紧固系统（上海）有限公司 | Cold heading manufacturing method for connection bolt of ignition switch and die |
| CN108296382A (en) * | 2018-01-30 | 2018-07-20 | 成都博瑞特金属制品有限公司 | A kind of production technology and eccentric connector of irony eccentric connector |
| CN110052788A (en) * | 2019-04-30 | 2019-07-26 | 海盐猛凌汽车配件有限公司 | A kind of contact bolt processing technic featuring |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08309472A (en) * | 1995-05-11 | 1996-11-26 | Daido Steel Co Ltd | Manufacture of precipitation hardening type stainless steel bolt |
| ITVR20030108A1 (en) * | 2003-09-09 | 2005-03-10 | Amafa Service S R L | PROCEDURE FOR COLD EXTRUSION OF SCREWS, IN PARTICULAR FOR |
| CN1954962A (en) * | 2005-10-25 | 2007-05-02 | 包凤鸣 | Cold upset extrusion shaping method for twisted steel roofbolt post bolt |
| CN101549449B (en) * | 2008-03-31 | 2011-01-19 | 江都狮鹤高强度螺栓有限公司 | Processing technology for high-strength large hexagon head bolt used for steel structure |
| CN101537472A (en) * | 2009-04-10 | 2009-09-23 | 日泰（上海）汽车标准件有限公司 | Bolt processing technic featuring one-step molding |
| CN101890618B (en) * | 2010-06-17 | 2012-05-30 | 鹏驰五金制品有限公司 | Processing method of high-strength bolts |
| CN101961829B (en) * | 2010-10-10 | 2012-05-16 | 浙江明泰标准件有限公司 | Bolt molding process requiring chamfering and milling multiple grooves |
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| CN102275065A (en) | 2011-12-14 |
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Owner name: NINGBO MINDA ELECTROMECHANICAL CO., LTD. Free format text: FORMER OWNER: NINGBO DAFENG MACHINERY CO., LTD. Effective date: 20140721 |
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Free format text: CORRECT: ADDRESS; FROM: 315821 NINGBO, ZHEJIANG PROVINCE TO: 315800 NINGBO, ZHEJIANG PROVINCE |
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Effective date of registration: 20140721 Address after: 315800, No. seven, No. 7, Beilun District, Zhejiang, Ningbo Patentee after: Ningbo Minda Electromechanical Co., Ltd. Address before: 315821 No. 98 Jiangnan Middle Road, Beilun District, Zhejiang, Ningbo Patentee before: Ningbo Dafeng Machinery Co.,Ltd. |
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| CP03 | Change of name, title or address |
Address after: 315800 No. 7, Jingqi Road, Beilun District, Ningbo City, Zhejiang Province Patentee after: Ningbo Minda Automobile Technology Co.,Ltd. Address before: 315800 No. 7, Jingqi Road, Beilun District, Zhejiang Province Patentee before: NINGBO ZHENHAI MINDA ELECTROMECHANICAL CO.,LTD. |
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