Automatic eccentric correcting method and device for machining hollow shaft

Abstract

The invention relates to an automatic eccentric correcting method and device for machining a hollow shaft. The automatic eccentric correcting method comprises the following steps that the hollow shaft is fixed to a turning center; the X coordinate value and the Y coordinate value of the axial center of an eccentric inner hole of the hollow shaft are measured, and the eccentric amount of the eccentric inner hole is calculated; an inner hole chamfer is machined with the axial center of the eccentric inner hole as the benchmark; the hollow shaft is automatically pre-tightened to enable the axial center of the eccentric inner hole to coincide with the axial center of the turning center, and automatic eccentric correction is achieved; the outer circle of the hollow shaft is turned roughly; the inner hole of the hollow shaft is turned in a fine mode, and then eccentric correction is finished. The automatic eccentric correcting method and device for machining the hollow shaft can achieve automatic eccentric correction of the eccentric hollow shaft on the turning center, is simple in operation process and is high in efficiency, and the production efficiency is improved by 5-8 times compared with a manual method. The eccentric amount of the outer circle and the inner hole of the hollow shaft can be lowered to below 0.3mm, and the machining accuracy of the hollow shaft is largely improved.

Description

technical field [0001] The invention relates to processing equipment for a hollow shaft, in particular to an automatic deviation correction method and device for processing a hollow shaft for adjusting the concentricity of the inner hole and the outer circle of the hollow shaft, and belongs to the field of mechanical processing. Background technique [0002] The traditional axle is a solid axle, and the center hole is used as a reference for the finishing of the axle. High-speed EMUs use hollow axles. Since the length of the hollow axle is more than 2m, the eccentricity of the drilling on one side reaches 0.4~1mm. In order to meet the coaxiality requirements of the outer circle of the axle and the inner hole, the inner hole is often processed first. Process the outer circle of the axle as the reference. With the improvement of the automation of axle processing, higher requirements are put forward for the correction of inner hole eccentricity. The traditional way to solve t...

AI Technical Summary

Problems solved by technology

The traditional way to solve the eccentricity of the hollow axle is to use ordinary lathes to manually measure the meter, use the center frame to adjust the position of the axle, and manually chamfer the inner hole. The traditional manual method has low precision, cumbersome methods, and low efficiency.

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