Method for measuring and compensating surface profile error of large rotary body part in real time

Abstract

The invention discloses a method for measuring and compensating a surface profile error of a rotary body part in real time. The method comprises the following steps of: (1) determining a common tangent of each carrier roller and a profile surface tangency point of the rotary body part, and thus obtaining an included angle which is formed by intersecting two tangents; (2) uniformly sampling the profile surface of the rotary body part to obtain a plurality of sampling points which are uniformly distributed on the circumferential direction, measuring a total error at each sampling point, and thus obtaining a profile error of two carrier rollers, which corresponds to each sampling point; (3) computing the surface profile error of the rotary body part at each sampling point; and (4) measuring a carrier roller radius error in real time, computing an error compensation value of each sampling point according to a real-time measurement value of a carrier roller profile error and a surface profile error value of the rotary body part, and compensating the error in real time. By adoption of the method, the surface profile error of a large rotary body can be measured and compensated in real time. The method has the advantages of convenience for measurement and accuracy in computation. The processing accuracy of a rotary body workpiece can be greatly improved.

Description

technical field [0001] The invention belongs to the processing field in the field of revolving bodies, and in particular relates to a method for measuring surface contour errors of revolving body parts and compensating errors in a cutting process in real time. Background technique [0002] In the processing of large revolving parts, since the diameter of the revolving body is generally more than two meters, the size and weight of the parts are relatively large, the supporting mechanism of the idler is usually used to support the revolving parts, relying on the friction between the idler and the revolving body Force, the idler drives the rotary body to rotate, and the milling cutter feeds in the radial direction when the rotary body rotates to process the rotary body parts. However, the external contour error of the rotating body parts and the idler roller will cause the beating of the center of rotation, resulting in machining errors. Therefore, when processing large revolv...

AI Technical Summary

Problems solved by technology

In the processing of large revolving parts, since the revolving body is supported by roller structure, milling cutter processing, there is no similar spindle structure when the revolving body rotates, and the surface contour error of the revolving body parts is not suitable for measurement, so this method cannot be measured The runout of the main shaft cannot perform online detection and error compensation for the processing of large rotary parts

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