Comparison of the Generating Method and Detecting Ability of RTCP Trajectories for Five-axis CNC Machine Tool

doi:10.3901/JME.2019.20.116

Abstract

Abstract: For five-axis CNC machine tools, the dynamic error caused by poor servo dynamic performance is the majority to harm accuracy during high-speed and high-precision manufacturing. As a common method to detect dynamic performance of five-axis machine tools, measurement by using RTCP (Rotation tool centre point) function is always known as a better way than others with the advantages of high detection accuracy, variable detection trajectory and little interference. The key to effectively detect with RTCP function is suitable trajectory, but the reported trajectories are simple and not enough to show dynamic performance of five-axis machine tool. Four RTCP trajectories, which are created respectively by regional arc, simple function, composite function and spline fitting, are used and the most effective trajectory generating method is shown by comparing measuring ability of 4 trajectories.

Key words: five-axis CNC machine tool, dynamic performance, RTCP function, RTCP trajectory

CLC Number:

TH161

DING Qicheng, WANG Wei, JIANG Zhong, ZHANG Jing, DU Li, WANG Liping. Comparison of the Generating Method and Detecting Ability of RTCP Trajectories for Five-axis CNC Machine Tool[J]. Journal of Mechanical Engineering, 2019, 55(20): 116-127.

References

[1] ANDOLFATTO L,LAVERNHE S,MAYER J R R. Evaluation of servo,geometric and dynamic error sources on five axis high-speed machine tool[J]. International Journal of Machine Tools & Manufacture,2011,51(10):787-796.
[2] 赵万华,张俊,刘辉,等. 数控机床精度评价新方法[J]. 中国工程科学,2013,15(1):93-98. ZHAO Wanhua,ZHANG Jun,LIU Hui,et al. New evaluation method on the precision of NC machine tools[J]. Engineering Sciences,2013,15(1):93-98.
[3] 陶桂宝,留成源,谷立恒,等. 基于激光跟踪仪的机床误差动态补偿方法:中国,CN 103143984 A[P]. 2013-06-12. TAO Guibao,LIU Chengyuan,GU Liheng,et al. Dynamic compensation method for machine tool errors based on laser tracker:China,CN 103143984 A[P]. 2013-06-12.
[4] NISHIGUCHI T,SATO R,SHIRASE K. Evaluation of dynamic behavior of rotary axis in five-axis machining center (Behavior around motion direction changes)[J]. Journal of Advanced Mechanical Design Systems & Manufacturing,2016,10(5):JAMDSM0075.
[5] WEIERT S. R-test,a new device for accuracy measurements on five axis machine tools[J]. CIRP Annals-Manufacturing Technology,2004,53(1):429-432.
[6] ZARGARBASHI S H H,MAYER J R R. Single setup estimation of a five-axis machine tool eight link errors by programmed end point constraint and on the fly measurement with Capball sensor[J]. International Journal of Machine Tools & Manufacture,2009,49(10):759-766.
[7] JYWEA Wenyuh,HSU Tung-Hui,LIU C-H. Non-bar,an optical calibration system for five-axis CNC machine tools[J]. International Journal of Machine Tools & Manufacture,2012,59(8):16-23.
[8] 王伟,郑从志,陈学尚,等. 一种机床RTCP三维同步检测装置及检测方法:中国,CN 104162807 B[P]. 2014-11-26. WANG Wei,ZHENG Congzhi,CHEN Xueshang,et al. RTCP one kind of three-dimensional synchronization detection device and method for detecting machine:China,CN 104162807 B[P]. 2014-11-26.
[9] 丁杰雄,周志鹏,刘福民,等. 一种五轴机床刀具姿态及刀尖点位置误差同步检测机构:中国,ZL201410811379.4[P]. 2015-05-20; 欧洲,EP3238875(B1)[P]. 2018-01-31. DING Jiexiong,ZHOU Zhipeng,LIU Fumin,et al. Five-axis machine tool cutter posture and cutter tip position error synchronous detection mechanism:China,ZL201410811379.4[P]. 2015-05-20; Europe,EP3238875(B1)[P]. 2018-01-31.
[10] ISO10791:Test conditions for machining centers-Part6 accuracy of feeds,speeds,interpolations[S]. 2014.
[11] 姜忠,丁杰雄,王伟,等. 基于RTCP功能的五轴数控机床动态误差溯源方法[J]. 机械工程学报,2016,52(7):187-195. JIANG Zhong,DING Jiexiong,WANG Wei,et al. Tracing the source of the dynamic error for five-axis cnc machine tool based on RTCP[J]. Journal of Mechanical Engineering,2016,52(7):187-195.
[12] ZHONG Lei,BI Qingzhen,HUANG Nuodi,et al. Dynamic accuracy evaluation for five-axis machine tools using S trajectory deviation based on R-test measurement[J]. International Journal of Machine Tools & Manufacture,2018,125(2018):20-33.
[13] 李祥飞,赵欢,赵鑫,等. 面向伺服动态特性匹配的轮廓误差补偿控制研究[J]. 机械工程学报,2017,53(1):150-156 LI Xiangfei,ZHAO Huan,ZHAO Xin,et al. Research on contour error compensation method with matched servo dynamic characteristics[J]. Journal of Mechanical Engineering,2017,53(1):150-156.
[14] 喻曦,赵欢,李祥飞,等. 基于双深度神经网络的轮廓误差补偿策略研究[J]. 机械工程学报,2019,55(3):130-137. YU Xi,ZHAO Huan,LI Xiangfei,et al. Research on contouring error compensation method using dual deep neural networks[J]. Journal of Mechanical Engineering,2017,55(3):130-137.
[15] 赵强强,洪军,刘志刚,等. 任意拓扑结构机床运动轴误差传递链建模方法[J]. 机械工程学报,2016,52(21):130-137. ZHAO Qiangqiang,HONG Jun,LIU Zhigang,et al. Modeling method on motive axes error transfer chain for machine tool of arbitrary topological structure[J]. Journal of Mechanical Engineering,2016,52(21):130-137.
[16] 姜忠. 影响工作精度的五轴数控机床联动性能测试方法研究[D]. 成都:电子科技大学,2017. JIANG Zhong. Study on detection of the linkage performance relate to the working accuracy of five axis CNC machine tools[D]. Chengdu:University of Electronic Science and Technology of China,2017.
[17] SONG Zhiyong,CUI Yawen. S-shape detection test piece and a detection method for detecting the precision of the numerical control milling machine:US,US 8061052 B2[P]. 2011-11-22.
[18] YANG Jixiang,ZHANG Haitao,DING Han. Contouring error control of the tool center point function for five-axis machine tools based on model predictive control[J]. International Journal of Advanced Manufacturing Technology,2016,88(9-12):1-11.
[19] YANG Shiyi,GHASEMI A H,LU Xiangxing,et al. Pre-compensation of servo contour errors using a model predictive control framework[J]. International Journal of Machine Tools & Manufacture,2015,98:50-60.