Method for repairing and strengthening gear through laser compound microtexture

A laser shock-strengthening and micro-texturing technology, applied in the field of laser composite micro-texture repairing and strengthening gears, can solve the problems of reduced gear tooth thickness, high cost, transmission failure, etc., and achieve uniform thickness, uniform steps, and uniform hardness distribution. Effect

Inactive Publication Date: 2013-04-24
WENZHOU UNIVERSITY +2
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Problems solved by technology

The main forms of gear failure produced by the existing method are tooth surface wear failure, pitting, and gluing, mainly due to the wear of the surface matrix of the gear teeth, and the reduction of the thickness of the gear teeth, which eventually leads to transmission failure and end of life
If many large gears fail to be replaced with new ones, the cost is too high

Method used

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  • Method for repairing and strengthening gear through laser compound microtexture
  • Method for repairing and strengthening gear through laser compound microtexture
  • Method for repairing and strengthening gear through laser compound microtexture

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Embodiment Construction

[0023] like Figure 1-2 As shown, the present invention provides a method for repairing and strengthening gears with laser composite microtexture, comprising the following steps:

[0024] (1) Carry out laser coating modeling treatment on the meshing surface of gear parts; specifically, include:

[0025] (1.1) Grind the meshing surface of the worn gear body 1 again with a grinder, and the thickness of the gear tooth 2 is required to be reduced by about 2mm compared to the original design value;

[0026] (1.2) Using the laser coating method, make a nickel-based wear-resistant alloy powder coating layer 3 on the surface of the polished gear; the output power of the laser is 5kw, the scanning speed is 400mm / min, the powder feeding rate is 18g / min, and the melting rate is 18g / min. The thickness of the cladding is 1.5-2mm, and multiple cladding can be carried out; and a grinding allowance is reserved.

[0027] (1.3) The working surface after laser coating is processed close to its...

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Abstract

The invention provides a method for repairing and strengthening a gear through laser compound microtexture. The method comprises the following steps of (1) modeling through laser coating on a meshing surface of a gear; and (2) carrying out laser shock peening on a coating layer, so as to obtain the gear repaired and strengthened through compound microtexture. According to the method for repairing and strengthening the gear through laser compound microtexture, the gear is processed into the original size through a laser coating method, and the gear is strengthened through laser, so that the hardness and abrasion resistance of the gear are greatly improved. Through detection on the gear repaired and strengthened by the method, the wearing layer thickness is even, the distribution of hardness is uniform, the rockwell hardness of a strengthening layer is HRC65, and the abrasion resistance is three times more than that of a common gear.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to gear parts used in various types of mechanical equipment, suitable for speed change devices and transmission devices, and in particular to a method for repairing and strengthening gears with laser composite micro-texture. Background technique [0002] Gears are wheel-shaped mechanical parts that transmit torque by the meshing of teeth. Through transmission with other toothed mechanical parts, the gear can change the speed and torque, change the direction of motion, and change the form of motion. The main forms of gear failure produced by the existing method are tooth surface wear failure, pitting, and gluing, mainly due to the wear of the surface matrix of the gear teeth and the reduction of the thickness of the gear teeth, which eventually leads to transmission failure and end of life. After many large gears fail, it will cost too much to replace them with new ones. Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C21D1/09
Inventor 冯爱新裴绍虎薛伟顾永玉
Owner WENZHOU UNIVERSITY
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