Method for controlling strengthening shot blasting deformation of large-end inner hole of connecting rod of marine diesel engine

Abstract

The invention provides a method for controlling strengthening shot blasting deformation of a large-end inner hole of a connecting rod of a marine diesel engine, belongs to the technical field of diesel engine processing, and aims to solve the problem of deformation after strengthening shot blasting of the large-end inner hole of the connecting rod of the diesel engine. On the premise that the equipment cost is not increased and the production efficiency and the processing quality are ensured, the structure of a part, the performance of a material, the mechanism of strengthening shot blasting and the like are comprehensively analyzed, and honing treatment is added before shot blasting and after fine boring of an inner hole at the large end of a connecting rod of a diesel engine by controlling a processing mode, a processing size and shot blasting parameters before shot blasting, so as to improve the dimensional stability and the surface roughness of the surface of the inner hole, and the problem of deformation of the large-end inner hole of the connecting rod after strengthening shot blasting is well solved.

Description

technical field [0001] The invention belongs to the technical field of diesel engine manufacturing, and in particular relates to a method for controlling the deformation of the inner hole of the large end of the connecting rod of the marine diesel engine through enhanced shot peening. Background technique [0002] The connecting rod is a key part of the marine diesel engine. It is composed of a connecting rod shaft, a large end cover, a bearing bush, a bushing, and a connecting rod bolt. The effect of the pressure load is very complicated, and the reliability and service life of the connecting rod determine the reliability and service life of the diesel engine to a large extent. [0003] Intensified shot peening is to use compressed air to drive the projectile to hit the surface of the part at high speed through the shot blaster. The mechanical energy generated by the projectile impact will cause a strong plastic deformation on the surface of the part, forming a tissue stren...

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is to provide a method for controlling the deformation of the large-end inner hole of the connecting rod of a marine diesel engine through enhanced shot peening. Under the premise of equipment cost and guaranteed production efficiency and processing quality, a comprehensive analysis of the structure of parts, material properties, and the mechanism of shot peening is carried out. By controlling the processing method, processing size, and shot peening parameters before shot peening, it is very easy Good solution to the problem of deformation of the inner hole of the large end of the connecting rod after strengthening the shot peening

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