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Vol. 174, Issue 7, July 2014, pp. 217-221




Research on Measuring and Optimization Method of Dynamic Accuracy of CNC Machine Tools

1, 2 Zhiming FENG, 2 Guofu YIN,

1 School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China
2 School of Mechanical Engineering and Automation, Xihua University, Chengdu 610039, China

1 E-mail: federers@sohu.com


Received: 23 April 2014 /Accepted: 30 June 2014 /Published: 31 July 2014

Digital Sensors and Sensor Sysstems


Abstract: Due to the traditional measuring method of dynamic accuracy of five-axis linkage CNC machine tools is time consuming ,insufficient comprehensive, and unable to put forward effective suggestions, a fast dynamic accuracy measuring and optimization method has presented in this work. Based on the measuring result of virtual “NAS979” test and RTCP test, the problem axis can be found out. The terminal’s moving tracks of the machine tool is measured by executing some special NC programs. After the analysis of frequency domain and circularity test, optimization suggestions of mechanical adjustment and parameters of the control system can be obtained. Therefore the dynamic accuracy of machine tool is improved. Application of the method on an A/C bi-rotary five axis machine tool indicates that it is valid and the machining accuracy has increased greatly.


Keywords: CNC machine tool, Dynamic accuracy, Virtual trial cutting method, RTCP.


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