Device and method for assembling piston pin hole bushing

Abstract

The invention relates to a device and a method for assembling a piston pin hole bushing and relates to the field of machine manufacturing. The device and the method are used for assembling a bushing in a pin hole in an engine piston. The device comprises a mounting seat, a fixing device, a bushing clamping device and an angle positioning device. The mounting seat comprises a base, a supporting body a and a supporting body b, wherein the supporting body a and the supporting body b are fixed to the two ends of the base correspondingly. The fixing device comprises a clamping cylinder and an ejection tray. The piston is arranged between the supporting body a and the supporting body b, and the two end faces of the piston are attached to the supporting body a and the supporting body b correspondingly. The lining clamping device comprises a clamp and a moving device, the moving device is fixed to the supporting body a, and the clamp is connected with the moving device. The angle positioning device comprises an angle positioning rod, a limiting adjusting sleeve and a limiting pin. When the bushing with the magnitude of interference larger than or equal to 0.1 is assembled, the assembling efficiency is higher, the assembling quality is better, the defective product rate is lower under the same condition, the overall structure is simple, and safety and reliability are achieved.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to a bushing device for assembling a piston pin hole and a method for assembling the bushing. Background technique [0002] In the industry, in order to improve the bearing capacity of the piston pin hole and prevent the pin hole from cracking, copper bushings are usually embedded in the piston pin hole. At present, the piston pin hole bushing assembly of internal combustion engines usually adopts a cold installation or a combination of cold and hot installation. For pure manual assembly, there are problems of large assembly position error and low assembly efficiency; for the automatic assembly fixture method used in the industry, in the assembly process, it is also necessary to manually install the frozen bushing on the assembly fixture before assembly , in the process of installing the bushing after manual contact with the frozen bushing, the bushing will absorb heat and e...

AI Technical Summary

Problems solved by technology

For pure manual assembly, there are problems of large assembly position error and low assembly efficiency; for the automatic assembly fixture method used in the industry, in the assembly process, it is also necessary to manually install the frozen bushing on the assembly fixture before assembly , in the process of manual installation of the frozen bushing, the bushing will absorb heat and expand, resulting in a rapid reduction in the assembly gap. This method has the problem of being stuck in assembly and scrapping the bushing with a relatively large design interference. If the gap is too small and the assembly tool is forcibly pressed in, the mating surface of the bush and the pin hole will be scratched, causing the bush to fail when the engine is running

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