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Screw stamping process

A screw and process technology, applied in the field of screw stamping technology, can solve the problems of easily damaged screw heads and high stamping pressure, and achieve the effects of smooth screw heads, improved stamping effect, and prevent damage

Active Publication Date: 2019-10-25
苏州上格五金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When stamping the screw head traditionally, the screw head is easy to be damaged due to the high stamping pressure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The specific implementation of the present invention will be further described below in conjunction with the examples. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0020] The technical scheme of concrete implementation of the present invention is:

[0021] The invention relates to a stamping process of screws, which uses a stamping die to stamp a screw blank to stamp out a screw head; and before stamping, a viscous protective layer is coated on the pressure receiving surface of the screw blank.

[0022] In parts by weight, the adhesive protective layer consists of the following components:

[0023] 7.5 parts polyvinyl alcohol,

[0024] 2.8 parts cardanol,

[0025] 1.5 parts sodium tripolyphosphate,

[0026] 2.1 parts butane 2-phospho-1,2,4-tricarboxylate,

[0027] 0.8 parts aluminum dihydrogen phosphate,

[0028] 2.2 parts of 2,6-di...

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PUM

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Abstract

The invention discloses a stamping technology of a screw. A stamping die is adopted for stamping a screw workblank to form a screw head; and before stamping is carried out, a pressure stressing face of the screw workblank is coated with a viscous protective layer. According to the stamping technology of the screw, before stamping is carried out, the pressure stressing face of the screw workblank is coated with the viscous protective layer, the viscous protective layer can play a role in buffering during stamping, and the screw head is prevented from being damaged, so that the screw head is smooth and clean. The viscous protective layer can further play a role in cooling during stamping, and the stamping effect of the screw is further improved.

Description

technical field [0001] The invention relates to a stamping process for screws. Background technique [0002] A screw generally includes a screw head, a screw rod and a screw tail. In the traditional screw processing, the screw head and the screw part are first stamped out, and then the thread part is processed on the screw part through the turning process, and finally the high and low thread is formed on the outer peripheral wall of the thread part blank diameter by the thread rolling device. When traditionally punching the screw head, the screw head is easily damaged due to the high pressure of the punching force. Contents of the invention [0003] The purpose of the present invention is to provide a screw stamping process. Before stamping, the pressure-receiving surface of the screw blank is coated with a viscous protective layer. The viscous protective layer can play a buffer role during stamping to prevent damage to the screw head. [0004] In order to achieve the ab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21K1/50
CPCB21K1/50
Inventor 张维哲
Owner 苏州上格五金有限公司