Fabrication process of hexagonal flange toothed bolt

A manufacturing process and flange surface technology, applied in the field of hexagonal flange surface toothed bolt manufacturing process, can solve the problems of raw material waste, unstable quality, difficult processing, etc., and achieve reasonable metal volume deformation, reasonable metal flow, and hardness. uniform effect

Inactive Publication Date: 2012-07-18
苏州新凌电炉有限公司
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  • Abstract
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Problems solved by technology

[0002] The toothed bolt with hexagonal flange surface includes a bolt head, a flange and a bolt shank; the flange bearing surface is provided with teeth, and the bolt shank is provided with threads; after the traditional process is formed into a conical shape by cold heading, it is used Punch stamping, trimming and forming, not only has many procedures, but also is difficult to process and low in efficiency, resulting in a great waste of raw materials, high cost, and unstable quality, which is easy to be broken during use

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  • Fabrication process of hexagonal flange toothed bolt
  • Fabrication process of hexagonal flange toothed bolt
  • Fabrication process of hexagonal flange toothed bolt

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Embodiment Construction

[0024] The present invention is described below in conjunction with accompanying drawing.

[0025] as attached figure 1 Shown is a hexagonal flange surface toothed bolt manufacturing process according to the present invention, which adopts medium carbon cold heading steel wire rod, and it mainly includes the following steps:

[0026] (1) Shearing and blanking: At the cutting station of the multi-station cold forging machine, cut the round material to the workpiece A with the same length, see figure 1 ;

[0027] (2) Pre-upsetting workpiece B: send the workpiece A obtained in step (1) to the first station of the cold forging machine to pre-upset the conical head 1, the height of the conical head 1 is controlled to 17mm, The included angle of the cone is controlled to be 15°, and the workpiece B is obtained, see figure 2 ;

[0028] (3) After pressing the dome, the workpiece C is obtained: send the workpiece B obtained in step (2) to the second station of the cold forging mac...

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Abstract

The invention discloses a fabrication process of hexagonal flange toothed bolt. In the fabrication process, medium carbon cold heading steel wires are used. The fabrication process mainly comprises the steps of: (1) shearing blanking; (2) preliminarily heading; (3) pressing to form a circular top; (4) pulling to produce a hexagonal product; (5) molding; (6) thread rolling; (7) heating; and (8) electroplating. In the fabrication process of hexagonal flange toothed bolt disclosed by the invention, the cold heading forming technology is adopted to carry out processing, thus the material utilization rate is over 98%, the material is saved, the cost is reduced; by the use of multi-position extrusion, the volumetric deformation and metal flow are more reasonable, fins produced in deformation process are removed, and the resistance to deformation is reduced; by undergoing thermal processing, the bolt has uniform grain and hardness, and is free of cracks; the qualification rate is up to 100%; by electroplating cadmium and titanium, the strength of the bolt is greatly improved, as well as the safety in use.

Description

technical field [0001] The invention relates to a bolt processing technology, in particular to a hexagonal flange surface toothed bolt manufacturing technology. Background technique [0002] The toothed bolt with hexagonal flange surface includes a bolt head, a flange, and a bolt shank; teeth are provided on the flange bearing surface, and threads are provided on the bolt shank; the traditional process is formed into a conical shape by cold heading, and then used Punch stamping, edge trimming and forming not only have many procedures, but also are difficult to process and low in efficiency, resulting in a great waste of raw materials and high cost. At the same time, the quality is not stable and it is easy to be broken during use. Contents of the invention [0003] In view of the above-mentioned technical problems, the object of the present invention is to propose a manufacturing process for hexagonal flange toothed bolts with stable quality, high strength and reasonable m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21J5/00
Inventor 孙丁
Owner 苏州新凌电炉有限公司
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