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Investigation of crucial geometric errors of screw grinder for ball screw profile parameters
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Investigation of crucial geometric errors of screw grinder for ball screw profile parameters
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Journal Article
Investigation of crucial geometric errors of screw grinder for ball screw profile parameters
2022
Overview
Based on the topology analysis of a screw grinder mapping the dressing error of the grinding wheel (DEGW) to the geometric errors of the virtual axis, an improved accuracy model of the screw grinder with 36 geometric errors is established, and an error model of ball screw profile parameters is established according to the forming principle. Then, the Sobol method is performed to analyze the error sensitivity and obtain the crucial geometric errors affecting the profile parameters by considering the individual and intercoupling effect. It is worth mentioning that the overall change of the global sensitivity sum of the crucial geometric errors for lead error (EL) and pitch diameter error (EPD) is 22.9% and 30.2%, respectively, which indicates that the model considering the DEGW has a stronger ability to identify the geometric errors. Lastly, the grinding experiments of ball screw under the adjustment of four grinder geometric errors are conducted. The results show that the crucial geometric error corresponding to the EL and EPD is consistent with the calculation results of the Sobol method, which verifies the effectiveness of the proposed method, and provides a way to trace the machining errors.
Publisher
Springer London,Springer Nature B.V
