Depth-of-cut Errors in Research on Elastic Deformation of Process System in Camshaft High Speed Grinding

Abstract

To address the issues related to the elastic deformation of non-circular profiles during high-speed grinding, this study proposes a novel mathematical model for predicting the deviation between preset and actual grinding depths in multi-pass operations. The model establishes a correlation between the feed displacement of the high-speed grinding wheel frame and the rotational angle of the camshaft’s non-circular contour. A series of experiments were conducted on a dedicated high-speed grinding platform to examine the influence of grinding depth, number of grinding passes, and grinding wheel speed on the elastic deformation and the dynamic stiffness of the grinding system. The results show that the discrepancy between the theoretical and measured displacements remains within 5.56 %, confirming the accuracy and robustness of the proposed model. Increasing the number of grinding passes significantly reduces feed errors induced by the elastic concession of non-circular profile, with the maximum elastic deformation displacement decreasing markedly from 68.9 % to approximately 1 % of the preset depth after five passes. This study pioneers the incorporation of the elastic concession characteristics of non-circular profiles into grinding deformation analysis, providing both a theoretical basis and practical guidance for compensating elastic deformation in camshaft grinding, thereby effectively improving machining accuracy and process stability.