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CSME 2020/08
Volume 41 No.4
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441-448
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An Evaluation Method of Gear Pitch Deviations Based on the Consideration of Installation
Jie Tanga, Jian-Jie Weia and Zhao-Yao Shia
aBeijing Engineering Research Center of Precision Measurement Technology and Instruments (Beijing University of Technology), Beijing 100124
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Abstract:
To lower the influence of installation errors on gear pitch measurement, an evaluation method of pitch deviations is introduced, considering installation eccentricity error and installation wobbling error. The pitch measurement points are firstly transformed from the machine coordinate system into the workpiece coordinate system. Then gear functional center is fitted according to least squares equation established with the pitch measurement points and base circle center, and solved by Newton’s method. After that, pitch deviations are evaluated according to ISO1328-1:2013. Experiments are carried out on a gear measurement center under four groups of different installation errors. The value of the variation among total cumulative pitch deviations of the product gear obtained by this method under different installation conditions is 0.39μm, whereas the variation obtained by the gear measurement center is 28.66μm. The method can be used to evaluate pitch deviations in the pitch measurement under certain installation errors
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Keywords: gear metrology, pitch deviation, eccentricity, coordinate metrology.
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*Corresponding author; e-mail:
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©
2020
CSME , ISSN 0257-9731
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