Laser honing process

Abstract

The invention discloses a laser honing process. Through laser honing, grooves with certain densities and depths are formed in the surface of a workpiece, so as to be convenient for lubricating oil storage and flowing, therefore, the abrasive resistance of a part is enhanced. The laser honing process comprises steps of roughening mechanically, determining a laser grinding track according to the process requirements of the part, determining the parameters of a laser, and carrying out laser honing and quality inspection. The surface roughness of the part mechanically processed is 2 to 3 mum. For determining the laser grinding track, the linear motion speed and the workpiece rotating speed of the laser are determined according to the sizes of the grooves. The grooves are 10 to 30 mum in width and 8 to 12 mum in depths, and the distance between two adjacent grooves is 1 mm. The power of the laser is 500W to 4KW, the spot diameter is 5 to 9 mum, the defocusing amount is 0 mm, the pulse frequency is 5 kHz to 10 kHz, and the protective gas flow is 4L/min to 5 L/min. According to the laser honing process, the grooves with different grains and different intensities are formed in the surface of the part, the processing quality is stable, and the processing accuracy is high, therefore, the service life of the part can be effectively prolonged.

Description

technical field [0001] The invention relates to a laser honing process. Background technique [0002] The technical indicators to measure engine performance include: power indicators, economical indicators, compactness indicators, strengthening indicators, reliability indicators, wear resistance indicators, etc. Among them, the power index, compactness index, strengthening index, etc. are determined by the design process, and other indexes are almost all determined by the manufacturing process performance of the parts. Cylinder liners and piston rings are the most important parts in the engine. Important indicators such as engine fuel consumption, engine oil consumption, and particulate emissions all depend on the manufacturing process of the cylinder liner-piston ring friction pair system. On the one hand, the friction pair is not well sealed. Or excessive wear will lead to increased gas leakage, increased oil consumption, increased noise and vibration, and increased exhau...

AI Technical Summary

Problems solved by technology

[0010] The superiority of laser honing technology can be seen from the principle and the existing research results. The economic and social benefits are very considerable. However, there are very few researchers and institutions currently participating in the research. There are only German GEHRJNG companies abroad, and only Jiangsu University in China. In the publish