CN102806296A - Female die structure of bolt assembly - Google Patents
Female die structure of bolt assembly Download PDFInfo
- Publication number
- CN102806296A CN102806296A CN 201210261721 CN201210261721A CN102806296A CN 102806296 A CN102806296 A CN 102806296A CN 201210261721 CN201210261721 CN 201210261721 CN 201210261721 A CN201210261721 A CN 201210261721A CN 102806296 A CN102806296 A CN 102806296A
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- China
- Prior art keywords
- die
- female die
- bolt
- sleeve
- die structure
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- 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.)
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Abstract
The invention discloses a female die structure of a bolt assembly. The female die structure comprises an outer die sleeve, wherein a middle die sleeve, a front cushion and a rear seat cushion are arranged in the outer die sleeve sequentially from top to bottom; a die ring and a die core are arranged in the middle die sleeve sequentially from top to bottom; a bolt head cavity is formed in the die ring; rod cavities which are communicated with one another are formed in the die core, the front cushion and the rear seat cushion; and an ejector rod is arranged in the rod cavity of the rear seat cushion. According to the female die structure of the bolt assembly, stress concentration is eliminated through a structural design of the middle die sleeve, the die ring and the die core in the outer die sleeve, so that the female die structure is easy and convenient to machine and assemble; during cold upsetting of a bolt round head, the average service life of a female die can reach 200,000 to 300,000 pieces/pair, so that the service life of the female die structure is prolonged by 40 to 60 times; and the female die structure is high and stable in product accuracy.
Description
Technical field
The present invention relates to a kind of bolt die, be specifically related to a kind of bolt combination die structure.。
Background technology
In the production process of header bolt, cold-heading round end die is the crucial mould in the cold-heading.This bolt die comprises die sleeve in the prior art, is provided with bolt head shape chamber in the die sleeve successively, bolt shank shape chamber; In bolt head shape chamber and junction, bar portion shape chamber; In the cold-heading process, serious stress concentration takes place, working chamber (bolt head shape chamber and bolt shank shape chamber) is burst apart, working chamber bursts apart and accounts for the 80%-90% of whole failure mode; Cause groove initial failure, service life is shorter.
Summary of the invention
Technical problem to above-mentioned existence the objective of the invention is: proposed a kind of minimizing stress and concentrated, increased substantially the die bolt combination die structure in service life.
Technical solution of the present invention is achieved in that a kind of bolt combination die structure, comprises outer die casing, die sleeve, foremast, back seat cushion under last, being provided with successively in the said outer die casing; Under last, be provided with mould circle, core rod successively in the die sleeve in said; Be provided with bolt head shape chamber in the said mould circle; Be provided with the bar portion shape chamber that communicates in said core rod, foremast, the back seat cushion; Be provided with the top rod in the said back seat lining bar portion shape chamber.
Because the utilization of technique scheme, the present invention compared with prior art has advantage:
A kind of bolt combination die structure of the present invention; Having eliminated stress through the structural design of middle die sleeve mould circle core rod in the outer die casing concentrates; Process and assemble is simple and convenient, and when the header bolt round end, die can reach 200,000/pair～300,000/pair average life; Make the die structure improve 40 times～60 times service life, the product precision is high and stable.
Description of drawings
Below in conjunction with accompanying drawing technical scheme of the present invention is described further:
Accompanying drawing 1 is the structural representation of a kind of bolt combination die structure of the present invention;
Wherein: 1, outer die casing; 2, middle die sleeve; 3, foremast; 4, back seat cushion; 5, mould circle; 6, core rod; 7, top rod; 8, bolt head shape chamber; 9, bar portion shape chamber.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described.
Be depicted as a kind of bolt combination die structure of the present invention like accompanying drawing 1, comprise outer die casing 1, die sleeve 2, foremast 3, back seat cushion 4 under last, being provided with successively in the said outer die casing 1; Under last, be provided with mould circle 5, core rod 6 successively in the die sleeve 2 in said; Be provided with bolt head shape chamber 8 in the said mould circle 5; Be provided with the bar portion shape chamber 9 that communicates in said core rod 6, foremast 3, the back seat cushion 4; Said back is provided with top rod 7 in the seat cushion 4 bar portion shape chambeies.Said core rod 6 can use the Hardmetal materials of hard high-wearing feature, and mould circle, middle die sleeve 2 adopt the 60Si2Mn steel to process.
The foregoing description only is explanation technical conceive of the present invention and characteristics; Its purpose is to let the personage that is familiar with this technology can understand content of the present invention and implements; Can not limit protection scope of the present invention with this; All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (1)
1. a bolt combination die structure comprises outer die casing, it is characterized in that: die sleeve, foremast, back seat cushion under last, being provided with successively in the said outer die casing; Under last, be provided with mould circle, core rod successively in the die sleeve in said; Be provided with bolt head shape chamber in the said mould circle; Be provided with the bar portion shape chamber that communicates in said core rod, foremast, the back seat cushion; Be provided with the top rod in the said back seat lining bar portion shape chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210261721 CN102806296A (en) | 2012-07-27 | 2012-07-27 | Female die structure of bolt assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210261721 CN102806296A (en) | 2012-07-27 | 2012-07-27 | Female die structure of bolt assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102806296A true CN102806296A (en) | 2012-12-05 |
Family
ID=47230265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210261721 Pending CN102806296A (en) | 2012-07-27 | 2012-07-27 | Female die structure of bolt assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102806296A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104707928A (en) * | 2015-04-01 | 2015-06-17 | 航天精工股份有限公司 | Cold heading die for manufacturing product chamfers with different length specifications and machining method of cold heading die |
| CN108380681A (en) * | 2018-03-07 | 2018-08-10 | 浙江三基钢管有限公司 | A kind of production method of cold-drawn external mold |
| CN108941416A (en) * | 2018-09-27 | 2018-12-07 | 舟山市7412工厂 | A kind of cold upsetting die of car structure |
| CN109014003A (en) * | 2018-09-27 | 2018-12-18 | 舟山市7412工厂 | A kind of production method of cold upsetting die of car |
-
2012
- 2012-07-27 CN CN 201210261721 patent/CN102806296A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104707928A (en) * | 2015-04-01 | 2015-06-17 | 航天精工股份有限公司 | Cold heading die for manufacturing product chamfers with different length specifications and machining method of cold heading die |
| CN108380681A (en) * | 2018-03-07 | 2018-08-10 | 浙江三基钢管有限公司 | A kind of production method of cold-drawn external mold |
| CN108941416A (en) * | 2018-09-27 | 2018-12-07 | 舟山市7412工厂 | A kind of cold upsetting die of car structure |
| CN109014003A (en) * | 2018-09-27 | 2018-12-18 | 舟山市7412工厂 | A kind of production method of cold upsetting die of car |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121205 |