Gear surface laser shock texturing method

Abstract

The invention discloses a gear surface laser shock texturing method. The method comprises the following steps: (1) polishing and cleaning a gear tooth surface, air-drying the gear tooth surface and uniformly spraying a black paint in the area near to 1/3 of the tooth top surface and 1/3 of tooth root surface of a pitch line; (2) mounting a gear on a workbench to position and clamp, setting parameters of a laser, allowing the laser beam to illuminate the pre-treated gear tooth surface through a focus lens and forming a micro concave pit; (3) processing a series of micro pit arrays on the gear surface by combining the numerical controlled workbench; (4) removing the black paint on the gear tooth surface by using acetone and cleaning the gear tooth surface by using ultrasonic wave. The laser shock texturing method belongs to the cold processing surface treatment and has no heat effect on the tooth surface; the size of the pit is in micro level and the strength of the gear teeth is not affected. Compared with the existing common gear, the friction coefficient of the gear tooth surface of the gear processed by the laser shock texturing is obviously reduced, and the hardness and the abrasion resistance are obviously increased.

Description

technical field [0001] The invention belongs to the gear surface strengthening treatment technology, in particular to a method for laser shock micro-modeling on the gear surface. Background technique [0002] Gear transmission is the most widely used form of transmission in mechanical transmission. Due to the advantages of precise gear transmission, high efficiency, compact structure, and reliable operation, it is widely used in aerospace, national defense, high-speed trains, microelectronics and other fields. During the gear meshing process, the tooth surface near the pitch circle is prone to tooth surface pitting, tooth surface plastic deformation, tooth surface gluing, tooth surface wear, etc., which seriously affects the stability and transmission performance of gear transmission. The quality of the gear directly affects the quality and life of the entire transmission system. Therefore, research on gear strengthening methods with high efficiency, high quality, low cost,...

AI Technical Summary

Problems solved by technology

The roughness of the gear tooth surface treated by laser shock strengthening technology is relatively poor, and may affect the strength of the gear teeth. For example, a device and method for underwater laser shock strengthening of gear pump gears by Ren Xudong of Jiangsu University (Patent No.: 201310384126.9 )

Although the surface finish of the gear obtained by ultrasonic deep rolling technology is better, the wear during processing is still difficult to control

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