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A pre-compensation method for profile errors of screw rotors under precision form grinding

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Abstract

Profile accuracy of screw rotor directly affects the performance of screw machine. In precision form grinding, the comprehensive influence of various factors such as thermal error, machine tool errors, and installation errors of grinding wheel will be directly reflected on the processing surface to form a processing error, and the error value has certain stability and repeatability. Therefore, a pre-compensation method for profile errors of screw rotors based on its error measurement is proposed to improve compensation effectiveness and avoid the complex error tracing and modeling process. By introducing the iteration coefficient for rotor profile errors and considering the number of times for repeated machining, a model for predicting pre-compensation error values of screw rotor profile is established. And the error compensation procedure is presented. The pre-compensated profile of the screw rotor is constructed by superimposing pre-compensation errors on the original rotor profile. Coordinate transformation and meshing condition are applied to generate grind wheel profile machining screw rotors again. Grinding experiments were performed for a couple of screw rotors by both the pre-compensation method and a single compensation method. Comparison results of grinding experiments verify the effectiveness of the proposed pre-compensation method for profile error of screw rotors.

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Funding

This work was supported by the Natural Science Foundation of the Higher Education Institutions of Jiangsu Province, China [19KJB460016], and Pre Research Fund for industry and university research of Zhangjiagang, and Doctoral Research Startup Project of Jiangsu University of Science and Technology.

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Authors and Affiliations

  1. School of electromechanical and power engineering, Jiangsu University of Science and Technology, Zhangjiagang, 215600, China

    Lijia Tao, Mingxin Yuan & Haifeng Fang

Authors
  1. Lijia Tao
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  2. Mingxin Yuan
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  3. Haifeng Fang
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Contributions

Lijia Tao: conceptualization, investigation, methodology, and writing original draft preparation.

Mingxin Yuan: investigation and writing—original draft preparation.

Haifeng Wang: investigation and validation.

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Correspondence to Lijia Tao.

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Tao, L., Yuan, M. & Fang, H. A pre-compensation method for profile errors of screw rotors under precision form grinding. Int J Adv Manuf Technol 117, 3229–3239 (2021). https://doi.org/10.1007/s00170-021-07878-7

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  • DOI: https://doi.org/10.1007/s00170-021-07878-7

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