Novel spring pre-strengthening finishing composite shot blasting method

A shot peening and finishing technology, which is applied in the direction of abrasives, metal processing equipment, manufacturing tools, etc., can solve the problems of reducing surface roughness and large surface roughness of spring steel, so as to improve mechanical properties, large residual compressive stress, and hardness high effect

Inactive Publication Date: 2013-02-27
SHANGHAI JIAO TONG UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to overcome the shortcomings of the large surface roughness of the spring steel surface treated by traditional shot peening technology, and provide a new shot peening technology that can not only significantly reduce the surface roughness, but also effectively enhance the mechanical properties of the material surface

Method used

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  • Novel spring pre-strengthening finishing composite shot blasting method
  • Novel spring pre-strengthening finishing composite shot blasting method
  • Novel spring pre-strengthening finishing composite shot blasting method

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Embodiment 1

[0040] Pre-strengthening and finishing composite shot peening

[0041] A shot peening machine is used to carry out pre-strengthening and finishing compound shot peening treatment on the spring. The pre-strengthening and finishing compound shot peening treatment includes three processes: the shot peening intensity of the first process is 0.23Amm, the shot peening intensity of the second process is 0.45Amm, and the second process is 0.45Amm. The shot peening intensity of the three processes is 0.15Amm, and the shot medium of the three shots is the same, and the third 0.15Amm finishing shot peening can further reduce the surface roughness of the shot peening to obtain a processed spring product.

[0042] The shot blasting machine is a pneumatic shot blasting machine, the shot medium used in the pneumatic shot blasting machine is G3 steel wire cut shot, the shot diameter is 0.6mm, and the shot hardness is 55HRC.

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Abstract

The invention relates to a novel spring pre-strengthening finishing composite shot blasting method. The method includes that a spring is subjected to pre-strengthening finishing composite shot blasting by a shot blasting machine, the pre-strengthening finishing composite shot blasting includes three processes, the shot blasting strength is 0.23Amm in the first process, the shot blasting strength is 0.45Amm in the second process, the shot blasting strength is 0.15Amm in the third process, and shot blasting mediums of three-time shot blasting are same to obtain a processed spring product. Compared with shot blasting methods in prior art, the novel spring pre-strengthening finishing composite shot blasting method has the advantages that the beneficial effect of residual compressive stress is increased, and negative influences caused by surface roughness of a part can be avoided to greatest degree.

Description

technical field [0001] The invention relates to a pre-strengthening and finishing composite shot-peening process for carrying out shot-peening strengthening treatment on a spring test piece. It is used in the technical field of spring materials or parts surface strengthening. Background technique [0002] Surface shot peening technology is a key manufacturing process to improve fatigue resistance, stress corrosion resistance and prolong service life of parts such as springs. It is currently widely used in the spring processing industry. The surface layer changes caused by shot peening include the introduction of residual compressive stress field, the generation of deformation and refinement structure, and the change of surface roughness. The service life of the component, although the increase of the surface roughness slightly reduces some properties of the material surface, but it is possible to avoid some adverse effects caused by the change of the surface roughness of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24C1/10B24C11/00
Inventor 姜传海付鹏詹科
Owner SHANGHAI JIAO TONG UNIV
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