Abstract
Ellipsoid part is now increasingly applied to the product manufacturing, while the high-quality ellipsoid part depends not only on the manufacturing and machining techniques, but also on the adopted measurement and evaluation approaches. Based on the typical quadratic surface, an evaluation method of the least squares ellipsoid deviation is proposed in this paper to quantify the form deviation of measured ellipsoid. The method can overcome the weakness of the low measurement adaptability compared with other evaluation methods. With obtaining the coefficients of surface equation to replace the linear superposing of the coordinates of measured points, the measurement error existing in the coordinates of measured points is homogenized and reduced effectively, which prompts to obtain the accurate measurement result. Finally, the results from experimental verifications show that the proposed method is effective for the measurement and evaluation of the ellipsoid deviation in Cartesian coordinates, and the adaptability is also a significant advantage in the measurement and evaluation of geometry deviation.
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Acknowledgements
This research is supported by the National Natural Science Foundation of China (Grant 51775423), the National Key Research and Development Program of China (Grant 2018YFB2000202), the China Postdoctoral Science Foundation (Grants 2017M623159 and 2018T111046), the Postdoctoral Science Foundation of Shaanxi Province (Grant 2017BSHEDZZ68), the Fundamental Research Funds for the Xi’an Jiaotong University (Grant XJJ2018047).
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Liu, F., Liang, L., Xu, G. et al. Measurement and Evaluation of the Ellipsoid Deviation in Cartesian Coordinates. Int. J. Precis. Eng. Manuf. 21, 2077–2088 (2020). https://doi.org/10.1007/s12541-020-00408-7
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DOI: https://doi.org/10.1007/s12541-020-00408-7