A Deterministic Modification Method for Outer Roundness of Shaft Parts

Abstract

The invention discloses a method for deterministically modifying the roundness of the outer circle of a shaft part, which comprises: measuring the roundness error of the surface of the shaft part to be processed; filtering the measured data; calculating the processed measured data to obtain the processed The cut-off frequency and shape characteristics of the surface shape; use the removal function generation algorithm to generate the corresponding simulation removal function; use the simulation removal function to simulate the processing and verify the effect until the roundness error meets the requirements; in the same material and diameter as the shaft part to be processed Process on the cylindrical surface and obtain the actual removal function; use the actual removal function to simulate the processing until the roundness error meets the requirements; import the NC code generated by the simulation processing software into the NC system, and use the deterministic abrasive belt grinding and polishing machine tool to process the axis Parts are processed. The invention optimizes the shape of the processed surface and customizes the removal function, which can improve the shape modification efficiency and shape modification accuracy.

Description

technical field [0001] The invention relates to the field of ultra-precision machining of the outer circle surface of shaft parts, in particular to a method for deterministically modifying the roundness of the outer circle of shaft parts. Background technique [0002] The rapid development of aerospace industry, precision optics, precision instruments, medical machinery and other fields all require the support of ultra-precision processing technology. As the most important and basic processing equipment for ultra-precision machining, the demand for ultra-precision machine tools is increasing. As one of the core components of ultra-precision machine tools, the air-bearing spindle has the advantages of small frictional resistance, high rotation accuracy, and low vibration and noise, and has been widely used in the field of ultra-precision machining and measurement. The rotation accuracy of the current air bearing spindle can reach 15-25nm, and the roundness error and cylindri...

AI Technical Summary

Problems solved by technology

However, because the axis error evaluation method is different from the traditional plane and free-form surface, the generation mechanism of the removal function is also different from other deterministic modification removal functions.

The above-mentioned deterministic modification theory of shaft parts has not yet provided a basis for the surface error processing method, and has not studied the generation mechanism and control methods of the removal function of the abrasive belt grinding and polishing, and has not achieved ultra-high-precision roundness modification at the 0.1 μm level

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