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Improved closed-loop tracking interferometer measurement for a five-axis machine tool with a bi-rotary milling head

Science China(Technological Sciences) 2022年第5期65卷 1127-1136页

作者： TANG XinYu XU Kun BI QingZhen SONG ZhiYong JI YuLei QIAN DeHou State Key Laboratory of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai200240China AVIC Chengdu Aircraft Industrial(Group)Co. Ltd.Chengdu610092China Shanghai TOP Numerical Control Technology Co. Ltd.Shanghai201100China

tracking interferometer based on bi-rotary milling head is a novel scheme to conduct volumetric accuracy measurement of a five-axis machine *** laser beam direction of the interferometer can be regulated to follow the retroreflector by moving the bi-rotary *** is a low-cost implementation of multilateration measurement,and its measurement accuracy is mainly affected by the error motion of the rotary *** paper proposes an improved multilateration principle to identify the positionindependent geometric errors of rotary axis and laser beam,and minimize their impact on the measurement uncertainty.A closed-loop tracking interferometer system installed on the spindle is developed to perform the measurement with high tracking *** device can be installed on an ordinary five-axis machine tool without modifying the machine tool *** proposed scheme is conducive to improving the accuracy and practical application of the tracking interferometer based on birotary milling *** with the corresponding closed-loop tracking interferometer and uncertainty analysis are conducted to verify the performance of the proposed measurement scheme.

关键词： tracking interferometer multilateration volumetric accuracy five-axis machine tools

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Estimation of Three-Dimensional Volumetric Errors of Numerically Controlled Machine Tools by a tracking interferometer

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Journal of Mechanics Engineering and Automation 2011年第4期1卷 313-319页

作者： Soichi Ibaraki Kunitaka Takeuchi Tomoaki Yano Toshiyuki Takatsuji Sonko Osawa Osamu Sato Department of Micro Engineering Graduate School of Engineering Kyoto University Yoshida-honmachi Sakyo-ku Kyoto606-8501 Japan Fine Manufacturing Systems Group Advanced Manufacturing Research Institute National Institute of Advanced IndustrialScience and Technology Japan National Metrology Institute of Japan National Institute of Advanced Industrial Science and Technology Japan

This paper presents the estimation of three-dimensional volumetric errors of a machining center by using a tracking interferometer. A tracking interferometer is a laser interferometer with the mechanism to steer the laser direction to follow a target retroreflector. Based on the triangulation principle, the three-dimensional position of the target can be estimated from measured laser displacements. Its capability to measure three-dimensional positioning errors for arbitrary trajectories is important for the indirect measurement of the machine＇s kinematic model. This paper presents experimental investigation of the estimation accuracy of the multilateration-based measurement by a tracking interferometer. A tracking interferometer developed by a part of the authors is used in experiments. In the present experiment, the measured volume of target positions was 100 mm × 100 mm × 100 mm. The estimation accuracy of targets within this volume was not sufficiently high compared to the positioning error of the measured machine tool. The results of the experiment and simulation show that the estimation uncertainty is dependent on tracking interferometer locations relative to target locations. Error sensitivity analysis shows that wider distribution of tracker positions in XY improves the estimation accuracy.

关键词： tracking interferometer laser tracker volumetric errors multilateration machine tools estimation accuracy.

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