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Manufacturing process of inner-hexagon cylindrical head shoulder screw

A manufacturing process, cylindrical head technology, applied in the field of hexagonal socket head shoulder screw manufacturing technology, can solve the problems of size, concentricity, brightness, parallelism, high raw material rate of processing loss, affecting product quality and output, etc. Achieve the effect of simple and convenient processing technology, improve production efficiency and convenient processing

Inactive Publication Date: 2012-07-11
苏州新凌高强度紧固件有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of processing has high man-hours, high rate of processing loss of raw materials, and has the disadvantages of inconsistency in size, concentricity, brightness, and parallelism. The scrap rate accounts for more than 5% and the processing cost is high, which affects the quality and output of products.

Method used

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  • Manufacturing process of inner-hexagon cylindrical head shoulder screw
  • Manufacturing process of inner-hexagon cylindrical head shoulder screw
  • Manufacturing process of inner-hexagon cylindrical head shoulder screw

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Embodiment Construction

[0021] The present invention is described below in conjunction with accompanying drawing.

[0022] as attached figure 1 , 2 As shown, in this implementation, the hexagon socket head head shoulder screw manufacturing process of the present invention mainly completes the processing of the hexagon socket head head shoulder screw through the following steps:

[0023] (1) Cutting material: In the cutting station of the multi-station cold forging machine, the workpiece A with a diameter of ∮7.85mm and a length of 60mm is cut by a cutting die, and the two ends of the workpiece A are evenly formed, without burrs, scratches, Defects such as tearing, see figure 1 ;

[0024] (2), cold extrusion production of the first mold workpiece B: put the workpiece A obtained in step (1) into the mold 1 and force it (cold extrusion) to produce a threaded rod with a shaft shoulder; The diameter is ∮5.2mm, the length is 10.8mm; the size of the rest of the rod is ∮7.9mm, and it is formed into workp...

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Abstract

The invention discloses a manufacturing process of an inner-hexagon cylindrical head shoulder screw. The manufacturing process comprises the following steps: cutting materials; intensively bunching; pre-upsetting; upsetting again and chamfering inside and outside; punching an inner hexagonal hole and molding; carrying out thread rolling; and carrying out heat treatment. By adopting the manufacturing process of an inner-hexagon cylindrical head shoulder screw, provided by the invention, the processing technology is simple and convenient; and a mould component is used for processing, so that the processing is convenient, the production efficiency is greatly improved, the concentricity, the parallelism and the luminance of each element of the processed screw are consistent, the size and precision requirements of the product are strictly ensured, and the screw strength is improved.

Description

technical field [0001] The invention relates to a screw manufacturing process, in particular to a hexagon socket head cylindrical head shoulder screw manufacturing process. Background technique [0002] The manufacturing process of this invention is mainly aimed at the hexagon socket head cap shoulder screw. The hexagon socket head shoulder screw includes a screw head, a shank and a threaded shank, and there is a shoulder between the threaded shank and the shank; before the processing of this type of hexagon socket head shoulder screw, generally select the appropriate size first The blank, through turning, processes the screw head, shank, threaded shank and the shoulder between the threaded shank and the shank, and then processes the external thread on the threaded shank. This kind of processing time is relatively high, the rate of processing loss of raw materials is high, and there are disadvantages of inconsistent size, concentricity, brightness, and parallelism. The scra...

Claims

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Application Information

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IPC IPC(8): B23P15/00C21D1/18C21D9/00
Inventor 孙丁
Owner 苏州新凌高强度紧固件有限公司
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