Study on the Measuring Method of Two-point Sizes for Revolving Body Based on the Roundness/Cylindricity Measuring Instrument
ZHAO Ze-xiang1,WANG Shuai-fei1,ZHAO Xin-yu2
1. School of Mechatronics Engineering, Zhongyuan University of Technology, Zhengzhou, Henan 450007,China
2. School of Computer Science, Zhongyuan University of Technology, Zhengzhou, Henan 450007,China
Abstract A measuring method of two-point size for revolving body based on the roundness/cylindricity measuring instrument was proposed. The model of the measurement system error for the radial size of the roundness/cylindricity measuring instrument was built based on the calibrated diameter of a standard cylinder. A new coordinate system was established by taking the center of the least square circle as its origin and the line connecting the center of the least square circle with the first sampling point as the x axis. Through coordinate translation and rotation, the coordinates of the sampling points in the original coordinate system were converted to the coordinates in the new coordinate system, and the corresponding polar coordinate values were converted. Based on the polar coordinate values above, their cubic spline interpolation equation for determining the two-point sizes of revolving body was built, and the flow chart of measuring and evaluating two-point size for revolving body was given. The evaluation of two-point sizes of the profiles of the cylinder features extracted on the cylindricity instrument was carried out by using the developed program. The mentioned research will provide a feasible measurement method for measuring two-point sizes of revolving body, which accords with the definition of the two-point size in GB/T 24637.3.
ZHAO Ze-xiang,WANG Shuai-fei,ZHAO Xin-yu. Study on the Measuring Method of Two-point Sizes for Revolving Body Based on the Roundness/Cylindricity Measuring Instrument[J]. Acta Metrologica Sinica, 2023, 44(6): 858-864.
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2023, Vol. 44 
