A processing method for a high-precision thin stepped shaft and a grinding chuck

Abstract

The invention provides a processing method for a high-precision thin step shaft and a grinding chuck for the processing method. The processing method mainly comprises the following steps: (1) preparing materials; (2) performing heat treatment; (3) performing end face and excircle turning and center drilling; (4) performing the heat treatment; (5) performing surface treatment; (6) performing abrasive machining on center holes in both ends of the thin step shaft; (7) grinding a step excircle and a step end face; (8) performing precision grinding; the grinding chuck comprises a clamping disk and a deflector rod arranged on the clamping disk; a chuck hole is formed in the middle part of the clamping disk; three inclined holes are evenly distributed, along the peripheral direction of the chuck hole, in the clamping disk; a lifting pin is arranged in each oblique hole, and is locked through an inner hexagon cone point set screw. According to the processing method and the grinding chuck provided by the invention, the thin step shaft is clamped through the grinding chuck to perform grinding on the excircle and the end face, and the processing quality is stable; meanwhile, traditional processes for cutting the thin step shaft into two pieces, performing abrasive cut-off on a rear end face and removing burrs are reduced in the processing technology of the processing method provided by the invention, so that the raw materials are greatly saved, and meanwhile, the processing efficiency is improved.

Description

technical field [0001] The invention relates to a processing method for a high-precision thin stepped shaft and a grinding chuck, belonging to the technical field of processing shaft parts. Background technique [0002] The step shaft is the most widely used shaft part at present, and the choice of its processing method directly affects the processing quality of the shaft and affects the performance of the shaft. There are many existing processing methods for shafts, but there is no relatively mature processing method for processing thin stepped shafts, such as figure 1 As shown, when grinding the stepped shaft outer circle 55 and the stepped end face 51 of the thin stepped shaft 5, if the stepped outer circle 52 of the thin stepped shaft 5 is clamped with a universal chicken heart chuck, the stepped shaft of the thin stepped shaft 5 cannot be ground The end of the outer circle 55 and the step end face 51, in order to be able to grind the end of the step shaft outer circle ...

AI Technical Summary

Problems solved by technology

However, this processing technology uses centerless grinding. First, the stepped shaft is ground into a cylindrical shaft with a large diameter, and then the outer circle with a small diameter is ground. This processing method is difficult to achieve thin-walled stepped shafts with centerless grinding. The grinding of the step end face of the step shaft, especially when there is a high position tolerance between the step end face and the outer circle, centerless grinding cannot be realized; at the same time, the above processing technology can only be used for the large outer diameter and small outer diameter size difference of about 0.5mm, long The difference between the shaft length and the short shaft length is 80-120mm, and its use is limited by the difference in outer diameter and length

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