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Investigate the spindle errors motions from thermal change for high-precision CNC machining capability

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Abstract

As the demand for high speed and highly accurate machines has significantly increased, error motions from thermal change, which is up to 70 % of the total machining error, is found to be the main hurdles to overcome in improving the accuracy of CNC machine tools. In this research work, the authors installed four eddy current displacement sensors in the spindle structure near to the front bearing to monitor the spindle offset in the bearing level, which is mainly attributable to the thermal error motions of the spindle. In addition, another three capacitance sensors are mounted on the machine table level and aligned with the x-, y-, and z-axis of the machine to monitor the spindle shift in the table level to find out the correlation between temperature change and the thermal error motions of the spindle. To measure the temperature changes, we attached thermal sensors in the machine and cooling system. The estimation of the spindle thermal displacement based on temperature data from these thermal sensors can provide more information for the monitoring of thermal error motions of the spindle.

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Authors and Affiliations

  1. Center of Advanced Manufacturing and Material Processing, Department of Engineering Design and Manufacture, Faculty of Engineering, University of Malaya, Kuala Lumpur, 50603, Malaysia

    Ahmed A. D. Sarhan

  2. Department of Mechanical Engineering, Faculty of Engineering, Assiut University, Assiut, 71516, Egypt

    Ahmed A. D. Sarhan

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  1. Ahmed A. D. Sarhan
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Correspondence to Ahmed A. D. Sarhan.

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Sarhan, A.A.D. Investigate the spindle errors motions from thermal change for high-precision CNC machining capability. Int J Adv Manuf Technol 70, 957–963 (2014). https://doi.org/10.1007/s00170-013-5339-5

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  • DOI: https://doi.org/10.1007/s00170-013-5339-5

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