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| Research on RTCP Calibration Algorithms for CNC Machine Tools Based on HNC–8 Five-Axis Linkage |
| ZHAO Xi1,2, SUN Hailong1,2, ZENG Chao1,2 |
1. AVIC Chengdu Aircraft Industrial (Group) Co., Ltd., Chengdu 610091, China;
2. Sichuan Aviation Intelligent Manufacturing Equipment Engineering Technology Research Center, Chengdu 610092, China |
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Abstract Five-axis RTCP functional machine tool can calculate the deviation of rotary displacement caused by the tool point, translating the linear axis to ensure that the coordinates of tool center point are fixed in workpiece coordinate system. Therefore, compared with machine tools without RTCP function, it can avoid the complexity of program control and improve the control accuracy. The key of RTCP control technology is to select the fixed parameters of machine tool model, that is, whether the RTCP parameters are accurate or not, and the measurement accuracy of RTCP parameters directly affects the control performance of machine tools. In this paper, the universal RTCP algorithm and RTCP calibration technology are studied based on the five-axis machine tool with HNC–8 double pendulum head structure of HNC system. The calibration method of RTCP double pendulum head is proposed, and the control accuracy of five-axis machine tool is tested and verified. Compared with traditional measurement technology, the proposed calibration algorithm improves the measurement efficiency while greatly improving the measurement accuracy.
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2019, 
