Stability Modeling and Analysis of Non-circular High-speed Grinding with Consideration of Dynamic Grinding Depth

doi:10.3901/JME.2021.15.264

Abstract

Abstract: Grinding chatter seriously affects the surface quality and reduces production efficiency of non-circular parts. Based on the analysis of geometric and kinematics characteristics of non-circular grinding, by simplified the workpiece-wheel system as a multiple degree of freedom spring damping system, and transformed the interaction between the workpiece and the grinding wheel into a physical model, dynamic grinding depth calculation method is proposed with considering regeneration effect and dynamic geometric characteristics of the non-circular grinding, the multi-factor coupling dynamic model of non-circular grinding is established. The camshaft as a sample, the modal parameters and contact stiffness of the grinding process system are obtained based on the experimental and theoretical methods, the stability lobe diagram was drawn considering the nonlinear characteristics of contact stiffness. Finally, the experiments are conducted to verified the proposed model and method, and the chatter stability mechanism of non-circular grinding was revealed. The results demonstrated that the stability lobes diagram considering the contact stiffness could predict the stability of the grinding process system accurately, high-speed grinding can effectively increase the non-circular profile shaft parts processing quality in the stable area, and vibrational state in different contour position is varied.

Key words: non-circular grinding, chatter stability, dynamical model, dynamic grinding depth, contact stiffness, camshaft

CLC Number:

TG156

LIU Tao, DENG Zhaohui, LUO Chengyao, Lü Lishu, LI Zhongyang, WAN Linlin. Stability Modeling and Analysis of Non-circular High-speed Grinding with Consideration of Dynamic Grinding Depth[J]. Journal of Mechanical Engineering, 2021, 57(15): 264-274.

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