Female die structure of bolt assembly

A technology of bolts and dies, applied in the direction of manufacturing tools, forging/pressing/hammer devices, forging/pressing/hammering machinery, etc., can solve the problems of groove failure, short service life, cracking, etc., and achieve simple and convenient processing and assembly , The effect of improving the service life and eliminating stress concentration

Inactive Publication Date: 2012-12-05
SUZHOU DONGLI MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new type of bolt used for casting concrete structures improves their durability over time due to its unique combination of materials that reduces stress concentrations during manufacturing processes. Additionally, this method simplifies the process of assembling these components into castings without requiring expensive tools or equipment like drilling holes at specific locations on them. Overall, it provides more precise and stable products than previous methods.

Problems solved by technology

The technical problem addressed by this patented technology relates to cracks that occur when producing cold-headed bolts due to severe stresses from repeated use or other factors such as temperature changes over time. This can lead to premature failures at both ends of the thread pathway where it connects two parts together.

Method used

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  • Female die structure of bolt assembly

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Embodiment Construction

[0010] The present invention is described below in conjunction with accompanying drawing.

[0011] as attached figure 1 Shown is a bolt combination die structure according to the present invention, which includes an outer mold cover 1, and the outer mold cover 1 is provided with a middle mold cover 2, a front cushion 3, and a rear seat cushion 4 sequentially from top to bottom; The mold ring 5 and the mold core 6 are sequentially arranged in the middle mold cover 2 from top to bottom; the bolt head cavity 8 is arranged in the mold ring 5; the mold core 6, the front pad 3, and the rear seat pad 4 is provided with a connected rod cavity 9; the rear seat cushion 4 is provided with a push rod 7 in the rod cavity. The mold core 6 can be made of hard alloy material with high hardness and high wear resistance, and the mold ring and the middle mold sleeve 2 are made of 60Si2Mn steel.

[0012] The above-mentioned embodiments are only to illustrate the technical conception and characteri

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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

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Claims

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Application Information

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Owner SUZHOU DONGLI MACHINERY
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