Abstract
Touch-trigger probes are widely used in on-machine inspection (OMI) systems, which have become increasingly important in an interprocess inspection. The pretravel errors are often compensated by data-driven calibration. However, its accuracy is significantly affected by its internal mechanical structure and trigger mechanism. In this paper, we propose a rigid-flexible coupling pretravel error model, considering the bending of the stylus and the lifting of the stylus carrier in the triggering process. This paper presents a method to identify the acceleration of machine tool by fitting the measured results at different speeds into quadratic curves and establishes the response error model. The trigger force of 73 direction probes is identified by a three-directional force sensor. The trigger force identified by the experiment is analyzed in the rigid-flexible simulation model, and the trigger resistance threshold of the probe is obtained. The simulation model of trigger error is established. Through the response error model and trigger error simulation model proposed in this paper, the probe pretravel error compensation accuracy can be improved by 39.6%.
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The authors are also grateful to the colleagues for their essential contribution to the work.
Funding
This paper is supported by the National Natural Science Foundation of China (Grant No. 61502263, Grant No. 51705281, Grant No. 61972220), the Shenzhen Foundational Research Project (Subject Layout) (Grant No. JCYJ20160428181916222), the Beijing Science and Technology Program (Grant No. D131100002713003), the National Defense Basic Scientific Research Program JCYJ20160428181916222, the National Defense Basic Scientific Research Program JCKY2018208B014, the National Natural Science Foundation of China 61972220, and the Natural Science Foundation for Youth of Guangdong Province (No: 2019A1515111137).
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Simi Li, Pingfa Feng, and Long Zeng designed all experiments included in this study, wrote, and modified this manuscript. Shuai Wang and Yamin Li conducted the simulation and modeling work. Shaoqiu Zhang assisted in conducting the experiments.
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Li, S., Feng, P., Zeng, L. et al. A rigid-flexible coupling pretravel error model for a touch-trigger probe in an on-machine inspection system. Int J Adv Manuf Technol 114, 2991–3003 (2021). https://doi.org/10.1007/s00170-021-06912-y
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DOI: https://doi.org/10.1007/s00170-021-06912-y