Workpiece axis positioning error compensation method for axle housing roundness and cylindricity detecting device

Abstract

The invention discloses a workpiece axis positioning error compensation method for an axle housing roundness and cylindricity detecting device and belongs to the field of detection. The method is characterized in that an axle housing positioning model is built, a first section, a second section and a third section are arranged on the model, and the second section and the third section are used tocorrect the first section step by step. The method specifically includes: a target section uses O as the benchmark to perform spatial translation on a circle contour where O1 is located, performing axis eccentricity compensation to obtain a section S1 after eccentricity correction, and an axis L and the section S1 are rotated a theta degree along a Z axis to obtain a section S2; the axis L and thesection S2 are rotated an alpha degree along a Y axis to allow the axis L to coincide with the Z axis so as to obtain a section S3; the section S3 and the axis L are reversely rotated theta degrees to obtain the section S4; error evaluation is performed on the section S4 to obtain real roundness errors with workpiece axis positioning eccentricity inclination errors being removed, and a constraintcondition beta is provided. The workpiece axis positioning error compensation method can compensate roundness errors and cylindricity errors caused by workpiece axis positioning eccentricity and workpiece axis positioning inclination, increase axle housing detection precision and meet ultra-precision machining requirements.

Description

technical field [0001] The invention relates to the technical field of detecting the roundness and cylindricity of an axle housing, in particular to a compensation method for a workpiece axis positioning error of an axle housing roundness and cylindricity detection device. Background technique [0002] The axle housing is a key component in the chassis of heavy-duty trucks, with an axial span of nearly 2m. Roundness and cylindricity have become key factors affecting product quality and reliability. In the past, in the production of the enterprise, the shape errors such as the roundness and cylindricity of the axle housing surface were mainly detected by contact with the manual dial indicator. It can only meet the sampling test in production. [0003] Based on the above problems, this research group has developed a roundness and cylindricity detection device for heavy truck axle housings. The structure is as follows: figure 1 As shown in the figure, 1 is the transmission mo...

AI Technical Summary

Problems solved by technology

Although the existing equipment such as roundness and cylindricity instruments have high precision and can limit the error caused by the eccentric tilt of the workpiece within a certain range, the mass of the axle housing is large and the axial span is large, which far exceeds the load limit of the rotary table and the measurement of the instrument itself. The range does not meet the detection conditions, and according to the current design structure of the heavy truck axle housing roundness and cylindricity detection device, the relative position of the sensor and the axle housing positioning is fixed, and the axle housing end does not have an adjustable and movable bearing platform. The existing technology of instrument and cylindricity instrument cannot be directly applied

At the same time, this kind of universal testing equipment is expensive and has high technical requirements, so it is difficult to apply to workshop testing

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