High-kinetic-energy micro-particle composite shot blasting surface strengthening process

A surface-strengthening, micro-particle technology, used in manufacturing tools, metal processing equipment, used abrasive processing devices, etc. It can improve the grain size of the workpiece surface, improve the protection and decoration, and reduce the surface hardness.

Active Publication Date: 2021-04-30
ZHEJIANG LAIFUAL HARMONIC DRIVE COMPANY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the actual operation, it is found that in the process of shot peening with 0.1mm particles, due to the high hardness and high strength of the processed workpiece, it is difficult to form a satisfact...

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  • High-kinetic-energy micro-particle composite shot blasting surface strengthening process
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  • High-kinetic-energy micro-particle composite shot blasting surface strengthening process

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Embodiment Construction

[0037] In conjunction with the above-mentioned accompanying drawings, a kind of high kinetic energy particle composite shot peening surface strengthening process of the present invention is described in detail:

[0038] A high kinetic energy particle composite shot peening surface strengthening process is characterized in that it includes the following steps:

[0039] (1) Shot peening parameter setting: determine the shot type, air pressure, shot flow rate, spray angle, spray time, spray gun type, surface distance between the nozzle and the workpiece according to the technical requirements; determine the shot type by testing;

[0040] The test for determining the type of shot includes: taking the test workpiece and performing shot peening with steel shot, glass shot and ceramic shot respectively. The shot peening parameters are consistent, and the particle size of each type of shot is consistent; and residual stress, determine the projectile type according to the test results,...

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Abstract

The invention discloses a high-kinetic-energy micro-particle composite shot blasting surface strengthening process. The process comprises the following steps of (1) setting shot blasting parameters; (2) shot treatment; (3) preparing shots; (4) placing a workpiece in place; (5) front shot blasting; and (6) reverse shot blasting. According to the process, aiming at the defects in the prior art, medium-frequency induction heating is used while micro-particles are subjected to shot blasting, micro-particles are heated to a certain temperature and ejected out through medium-frequency induction heating while shots generate kinetic energy under pushing of compressed air, after heated micro-particles make contact with the surface of the workpiece, a high heat conduction effect is generated, the surface of the workpiece is heated, surface hardness is reduced, high-kinetic-energy particles can further refine metal grains on the surface layer of the workpiece, while a strong surface pressure layer is generated, a grain size of the surface of the workpiece is improved, a surface contact stress of the workpiece is improved, and the fatigue life of the workpiece is prolonged.

Description

technical field [0001] The invention belongs to the field of shot peening treatment, and in particular relates to a high kinetic energy particle composite shot peening surface strengthening process. Background technique [0002] Conventional shot peening treatment is to spray steel shot, glass shot and ceramic shot onto the surface of the workpiece to cause plastic deformation of the workpiece to form a certain compressive stress strengthening layer, and a high residual stress is formed in the strengthening layer. The existence of the workpiece can offset part of the stress when the workpiece is under load, thereby improving the fatigue strength of the workpiece. The advantages of shot peening are that the equipment is simple, the cost is low, it is not limited by the shape and position of the workpiece, and it is easy to operate. The disadvantage is that the working environment is poor, the unit output is low, and the efficiency is lower than shot blasting. The types of sh...

Claims

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Application Information

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IPC IPC(8): B24C1/00B24C11/00B24C9/00B24C7/00
CPCB24C1/00B24C11/00B24C9/00B24C7/00B24C7/0046
Inventor 杨燃张杰俞城双张雷洪
Owner ZHEJIANG LAIFUAL HARMONIC DRIVE COMPANY
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