A New Thermal Error Control Method for Spindle System of
  High Precision Computer Numerical Control Machine Tools

doi:10.16183/j.cnki.jsjtu.2019.031

Abstract

Abstract: In order to solve the problem of thermal errors in the spindle system of high precision computer numerical control (CNC) machine tools, a novel active control method for spindle thermal deformation was proposed. Besides, a helical coil cooler was designed, the influence of silicone grease thickness on the contact thermal resistance between a spindle and a cooler was analyzed, and a thermal resistance model was established. Based on the simplified spindle system, a thermal-fluid-solid finite element model was constructed, and the cooling parameters were simulated. The finite element model was verified by using a temperature control system. The results show that the finite element model can effectively predict the variation of thermal characteristics of the spindle system. The cooler has a high heat exchange efficiency, the thermal equilibration time is reduced by 68%, and the thermal error is reduced by 19%. This study provides a new idea for thermal error control of precision machine tool spindle.

Key words: computer numerical control (CNC) machine tool; spindle system; temperature control; thermal error; thermal-fluid-solid model

CLC Number:

ZHAO Liang,LEI Mohan,ZHU Xingxing,WANG Shuai,LING Zheng,YANG Jun,MEI Xuesong. A New Thermal Error Control Method for Spindle System of High Precision Computer Numerical Control Machine Tools[J]. Journal of Shanghai Jiaotong University, 2020, 54(11): 1165-1171.

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A New Thermal Error Control Method for Spindle System of High Precision Computer Numerical Control Machine Tools

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