Accuracy of an electric spindle

doi:10.16511/j.cnki.qhdxxb.2018.26.035

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Abstract An electric spindle, as the core of a CNC machine center, directly affects the accuracy of the CNC machining center. This paper describes a method to evaluate electric spindle accuracy by analyzing the spindle radial, tilt and axial motion errors. A radial error model of the electric spindle is then developed from the least squares circle. A rapid evaluation method of the radial accuracy uses a least squares circle approximation algorithm. The radial error is then used to calculate the tilt error and the tilt angle of the spindle rotation axis. Time and frequency domain signal analyses are used to extract the eigenvalues of the axial error to evaluate the axial positioning accuracy of the spindle. This comprehensive accuracy analysis method was applied to a high-speed electric spindle with the results showing that with as the rotational speed increased, the radial error increased while the tilt error and the axial error remained constant. This accuracy analysis method can be applied to analyzed the performance and accuracy degradation of spindles.

Keywords spindle radial error motion tilt error motion axial error motion least squares circle

Issue Date: 15 August 2018

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	WANG Liping
	ZHAO Qinzhi
	ZHANG Binbin

Cite this article:

WANG Liping,ZHAO Qinzhi,ZHANG Binbin. Accuracy of an electric spindle[J]. Journal of Tsinghua University(Science and Technology), 2018, 58(8): 746-751.

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http://jst.tsinghuajournals.com/EN/10.16511/j.cnki.qhdxxb.2018.26.035 OR http://jst.tsinghuajournals.com/EN/Y2018/V58/I8/746

[1] ABELE E, ALTINTAS Y, BRECHER C. Machine tool spindle units[J]. CIRP Annals-Manufacturing Technology, 2010, 59(2):781-802.
[2] 王立平, 张彬彬, 吴军. 基于最小二乘法的电主轴回转精度评价[J]. 制造技术与机床, 2018(2):54-60.WANG L P, ZHANG B B, WU J. Rotation accuracy evaluation of electric spindle based on least square method[J]. Manufacturing Technology and Machine Tool, 2018(2):54-60. (in Chinese)
[3] KAKINO Y, YAMAMOTO Y, ISHⅡ N. A new measuring method of rotating accuracy of spindle[J]. Annals of the CIRP, 1977, 26(1):241-244.
[4] LIU C H, JYWE W Y, LEE H W. Development of a simple test device for spindle error measurement using a position sensitive detector[J]. Measurement Science and Technology, 2004, 15(9):1733.
[5] FUJIMAKI K, MITSUI K. Radial error measuring device based on auto-collimation for miniature ultra-high-speed spindles[J]. International Journal of Machine Tools and Manufacture, 2007, 47(11):1677-1685.
[6] ANANDAN K P, TULSIAN A S, DONMEZ A, et al. A technique for measuring radial error motions of ultra-high-speed miniature spindles used for micromachining[J]. Precision Engineering, 2012, 36(1):104-120.
[7] ANANDAN K P, OZDOGANLAR O B. Analysis of error motions of ultra-high-speed (UHS) micromachining spindles[J]. International Journal of Machine Tools and Manufacture, 2013, 70:1-14.
[8] OKUYAMA E, NOSAKA N, AOKI J. Radial motion measurement of a high-revolution spindle motor[J]. Measurement, 2007, 40(1):64-74.
[9] LIU W, TAO T, ZENG H. New time-domain three-point error separation methods for measurement roundness and spindle error motion[C]//Optical Measurement Technology and Instrumentation. Beijing, China:Proceedings of SPIE, 2016,101550Y.
[10] ZHANG G X, WANG R K. Four-point method of roundness and spindle error measurements[J]. CIRP Annals-Manufacturing Technology, 1993, 42(1):593-596.
[11] ZHANG G X, ZHANG Y H, YANG S M, et al. A multipoint method for spindle error motion measurement[J]. CIRP Annals, 1997, 46(1):441-445.
[12] CASTRO H F F. A method for evaluating spindle rotation errors of machine tools using a laser interferometer[J]. Measurement, 2008, 41(5):526-537.
[13] 中华人民共和国国家质量监督检验检疫总局, 中国国家标准化管理委员会. 机床检验通则第7部分:回转轴线的几何精度:GB/T 17421.7-2016[S]. 北京:中国标准出版社, 2016.General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China. Test code for machine tools-Part 7:Geometric accuracy of axes of rotation:GB/T 17421.7-2016[S]. Beijing:Standards Press of China, 2016. (in Chinese)

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