Processing and assembling process for large thin-wall sleeve

Abstract

The invention belongs to the technical field of mechanical part processing, an relates to a processing and assembling process for a large thin-wall sleeve, and the processing and assembling process isused for repairing abrasion of a shaft neck of a cam shaft. The processing and assembling process for the large thin-wall sleeve comprises the following steps of: processing the outer diameter of theoriginal shaft neck to a specified dimension; uniformly processing out a section in the axial direction of the peripheral side of the processed shaft neck; processing out a sleeve; performing thermalrefining after the outer diameter of the sleeve and the inner diameter of the sleeve are processed; assembling the processed sleeve with the processed shaft neck; adopting an interference hot-assembly matching process for assembling in step IV; and processing the matched sleeve, and processing the outer diameter and the sleeve until the outer diameter is a drawing size, thereby completing processing and assembling of the sleeve. The fixing structure of the sleeve is improved, and the assembling and processing way of the sleeve for repairing a shaft end has a good structural stability and highstrength.

Description

technical field [0001] The invention belongs to the technical field of mechanical parts processing, and in particular relates to a processing and assembly process of a large-size thin-walled sleeve used for camshaft journal wear repair. Background technique [0002] The processing and use of sleeves is very common in the machinery industry. When the outer diameter exceeds 100mm, the minimum wall thickness is 3mm. However, even if we process the sleeve according to this standard, when it is assembled with the corresponding shaft, the sleeve is still easily deformed, and it is difficult to meet the assembly accuracy requirements. [0003] Generally speaking, for crankshafts with a diameter of less than 80mm and a roundness and cylindricity error of more than 0.025mm, or a crankshaft with a diameter of more than 80mm and a roundness and cylindricity error of more than 0.040mm, when the journal is severely worn, repair and then grind Cut to the specified size or repair the size...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a processing and assembly process for a large thin-walled sleeve. By removing the amount of wear on the shaft end, a sleeve is placed on the position of the removed amount through the process of interference thermal assembly, and the sleeve is installed again. Processing is carried out so that the outer diameter of the sleeve is consistent with the outer diameter of the shaft diameter, that is, the assembly and processing of the sleeve is completed, and the problem that the existing large-diameter journal cannot be repaired after wear is solved