Process for repairing piston ring groove

Abstract

The invention discloses a process for repairing a piston ring groove. The process includes the following steps of firstly, cleaning away carbon deposits and greasy dirt in the piston ring groove; secondly, roughly machining the ring groove before fusion covering so that mesh-shaped lines can be produced, and conducting measuring and grouping on the size of the ring groove in the rough machining process; thirdly, spreading fusion covering materials; fourthly, melting the fusion covering materials through a laser device, wherein a piston uniformly rotates in the process, and meanwhile lasers are controlled through programs so that the irradiation angle and the irradiation range can be ensured and the covering materials and base materials on the same plane can be evenly and effectively combined; fifthly, placing the piston in a well type electric furnace to be heated after laser melting is conducted, and conducting thermal insulation; sixthly, conducting turning on the ring groove; seventhly, conducting fine machining on the ring groove; eighthly, conducting fluorescent magnetic particle flaw detection on the repaired part of the ring groove so that the piston cracking in the fusion covering process can be prevented from being put into use. The piston ring groove which is repaired can completely replace a newly-manufactured piston, the service life of the product is prolonged, and obvious social benefits and economic benefits are achieved.

Description

technical field [0001] The invention relates to a repairing process of a piston ring groove. Background technique [0002] The life of the piston of an internal combustion engine depends on the wear of the piston ring groove. At present, there are many repairs to the piston of low-speed diesel engines at home and abroad, and the chrome plating process on the surface of the ring groove is mature and commonly used. The technology is not yet mature. The main reason is that compared with medium and high-speed machines, the piston of low-speed machines is of high value and has repair value. In addition, the size of the piston is large, the width of the ring groove is wide, and the chrome-plating process is more maneuverable. [0003] According to the experience of production practice, the unilateral wear of the ring groove is about 0.2-0.5mm after two years of use. It would be a pity if the piston or the piston top is scrapped because of this. At present, in order to advocate t...

AI Technical Summary

Problems solved by technology

[0003] According to the experience of production practice, the wear on one side of the ring groove after two years of use is about 0.2-0.5mm. It would be a pity if the piston or piston top is scrapped because of this.