Prediction Model and Compensation System of CNC Machine Tool Thermal Error
W. Zhang†*, H. M. Vollmer‡
†College of Energy and Transportation Engineering, Jiangsu Vocational Institute of Architectural Technology, Xuzhou, 221000, China,
‡Coastal Hydraulics Laboratory, U.S. Army Engineering Research and Development Center,Vicksburg, MS 39180, U.S.A.
ABSTRACT: The thermal error compensation is an economical and effective method to reduce thermal error and improve the machine tool precision. The most economic and fast way of thermal error compensation is through modeling software to compensate, the thermal error modeling is the core technology of the thermal error compensation. This paper is first through improving the precision of grey theory model to improve the model, function transformation method is used to improve the smoothness of grey system data sequence, in order to make up for the inadequacy of traditional grey prediction model, making the prediction more reasonable. Finally, experiment research for robust modeling of thermal error is carried, and real-time compensation of thermal error is applied for turning center. Thermal error compensation system will be obtained and proved to be right through practical manufacturing process.
Keywords : Thermal error; Prediction comprehensive model; Compensation experimental analysis.
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