Comprehensive thermal growth compensation method of spindle and servo axis error on a vertical drilling center

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• 作者：Kuo Liu ; Yu Liu ; Ming-jia Sun ; Yu-liang Wu…
• 关键词：Vertical drilling center ; Spindle ; Servo axis ; Comprehensive thermal growth ; Compensation
• 刊名：The International Journal of Advanced Manufacturing Technology
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：88
• 期：9-12
• 页码：2507-2516
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Industrial and Production Engineering; Media Management; Mechanical Engineering; Computer-Aided Engineering (CAD, CAE) and Design;
• 出版者：Springer London
• ISSN：1433-3015
• 卷排序：88

文摘

This paper deals with the modeling of comprehensive thermal growth of spindle and servo axis. Thermal errors of a vertical drilling center TC500 were measured using a spindle error analyzer and a laser interferometer, thermal error of servo axis was decomposed, and each term analyzed. Spindle thermal growth model based on temperature variation including an identification method for the parameters of the suggested model was presented. Similarly, the servo axis models for thermal expansion error (TEE) in the stroke range and the thermal drift error (TDE) of origin were derived based on heat-transfer mechanism, and the parameter identification method was presented. The experimental results indicate that by applying the proposed model, high accuracy stability can be achieved, even when the moving state changes randomly. A specific machining process of the upper surface of a rectangular workpiece was designed to verify the effects of error compensation to the unaided eye. The machining results indicate that the proposed model has high accuracy and strong robustness in compensating the comprehensive thermal error.