Method for saturated shot blasting of stainless steel spring

A technology of stainless steel and shot peening, which is applied to heat treatment equipment, furnaces, heat treatment furnaces, etc. It can solve the problems of unclear shot peening time of stainless steel springs and unstable outer diameter expansion, so as to reduce sorting hours, improve production efficiency, The effect of improving stability

Active Publication Date: 2013-02-13
WUXI WEIFU PRECISION MACHINERY MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantages of this method are: the shot peening time of stainless steel springs is not clear, the shot peening time is generally 5 to 10 minutes, the expansion of the outer diameter is unstable, and the outer d

Method used

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  • Method for saturated shot blasting of stainless steel spring
  • Method for saturated shot blasting of stainless steel spring
  • Method for saturated shot blasting of stainless steel spring

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0015] Embodiments 1-15: A method for saturated shot peening of stainless steel springs, including the following steps:

[0016] (1) Add 25kg steel shot with an outer diameter of 0.4mm into the shot blasting machine, and shot blast the stainless steel spring with a specification of 1.7×16.5×26.5mm;

[0017] (2) Use a vernier caliper to measure the outer diameter of the stainless steel spring every 5 minutes (the specific outer diameter measurement values ​​of Examples 1-15 within 70 minutes are shown in Table 1), when the outer diameter change value measured twice is Within the range of 0~0.02mm, the stainless steel spring reaches saturation shot peening, and the shot peening process is completed; after 30 minutes of shot peening, the surface coverage rate of the stainless steel spring 10 times magnifying glass is> 90%, the coverage rate increases, and the spring life With the improvement, the outer diameter of the stainless steel spring tends to be saturated, eliminating the need ...

Example Embodiment

[0023] Embodiments 16-30: A method for saturated shot peening of stainless steel springs, including the following steps:

[0024] (1) Add 30kg steel shot with an outer diameter of 0.4mm into the shot blasting machine, and blast a stainless steel spring with a specification of 1.4×11.5×16.72mm;

[0025] (2) Use a vernier caliper to measure the outer diameter of the stainless steel spring every 5 minutes (the specific outer diameter measurement values ​​in 70 minutes in Examples 16 to 30 are shown in Table 2), when the outer diameter change value measured twice is Within the range of 0~0.02mm, the stainless steel spring reaches saturation shot peening, and the shot peening process is completed; after 30 minutes of shot peening, the surface coverage rate of the stainless steel spring 10 times magnifying glass is> 90%, the coverage rate increases, and the spring life With the improvement, the outer diameter of the stainless steel spring tends to be saturated, eliminating the need for o...

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Abstract

The invention relates to a method for saturated shot blasting of a stainless steel spring. The method is characterized by comprising the steps as follows: (1), steel shots are added in a shot blasting machine, and shot blasting is carried out on the stainless steel spring; and (2), the external diameter of the stainless steel spring is measured every five minutes, and when the variation values of the external diameters measured twice are within the range of 0 to 0.02 mm, the stainless steel spring reaches the saturated shot blasting to finish the shot blasting process. The external diameter of the steel shots is 0.4 mm. The method has the advantages that (1), the stability of the external diameter of the spring can be improved; (2), the surface coverage rate of the spring is higher, and the fatigue life is prolonged; and (3), the separation working hours can be reduced, the mounting is more facilitated, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a shot peening method, in particular to a saturated shot peening method for stainless steel springs. Background technique [0002] Springs are widely used in all walks of life, and the materials used are also very wide. However, in general, springs are mainly carbon steel wires and alloy steel wires. There are few studies on stainless steel materials, especially the relationship between shot peening process and stainless steel springs. . [0003] Shot peening treatment is also called shot peening strengthening, which is one of the effective methods to reduce fatigue of parts and improve service life. Shot peening treatment is to spray high-speed projectile flow onto the surface of the spring, so that the surface layer of the spring is plastically deformed, and a strengthening layer with a certain thickness is formed. Higher residual stress is formed in the strengthening layer. Due to the existence of compressive stress on the ...

Claims

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Application Information

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IPC IPC(8): C21D7/06C21D9/02
Inventor 孙寿元
Owner WUXI WEIFU PRECISION MACHINERY MFG
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