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Arc Extraction Analysis for Circularity Measurement of Small Cylindrical Parts by the segmenting-stitching method

仪器仪表学报:英文版 2023年第3期10卷 1-11页

作者： ZHAO Jiali WU Dan ZHANG Liang SHEN Bobo LI Qiaolin School of Mechanical and Electrical Engineering Lanzhou University of TechnologyLanzhou 730050China Shenzhen International Graduate School Tsinghua UniversityShenzhen 518055China

To reduce the stitching error of circularity measurement of small cylindrical workpieces(Diameter less than 3 mm)by the segmenting-stitching method,arc contour extraction is analyzed in this *** coordinates of cross-sectional circle of a small cylindrical part are segmented into several equal arcs to be obtained by a two-dimensional coordinate measuring *** circularity contour of the small cylindrical part can be formed by stitching a series of arc contours which are calculated by the obtained arc coordinate *** to the different measuring pressure angles of different measuring positions,the accuracy of obtained arc coordinate points is *** bigger the pressure angle is,the accurate the obtained arc coordinate data *** experiments show that the accuracy of two ends of the arc data is not as good as the central ***,the two ends of the obtained arc data are appropriately to be cut off,namely,only the central part of the arc data are extracted to be used for the *** a result,the mean value of the matching coefficient is enhanced by 12%,the deviation between the overlap part of the neighbouring arc contour is reduced by 26%,and the average curvature of the arc contours is improved with the extraction ***,the accuracy of the stitched circularity contour can be improved by this extraction procedure in the segmenting-stitching method for the circularity measurement of the small cylindrical parts.

关键词： Circularity Measurement Arc Extraction Small Cylindrical Workpiece segmenting-stitching method

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维普期刊数据库

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Improved Circularity Metrology of Small Cylindrical Workpieces by the segmenting-stitching Technique

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Instrumentation 2023年第4期10卷 39-49页

作者： ZHAO Jiali ZHANG Liang WU Dan SHEN Bobo LI Qiaolin School of Mechanical and Electrical Engineering Lanzhou University of TechnologyLanzhou 730050China Shenzhen International Graduate School Tsinghua UniversityShenzhen 518055China

To address the alignment and measuring force problem in the segmenting-stitching technique for the circularity metrology of small cylindrical workpieces(diameter less than 1.5 mm and length less than 10 mm),a magnet combination jig method is proposed.A small round magnet is attached between the round magnetic jig and small cylinder,and the other end of the small cylindrical workpiece is attached to some cylindrical ***,the smaller cylinder can be put in the V-groove and measured successfully with the magnet *** verifying the advantage of the magnet combination jig,four measurement quality evaluations are proposed:the circumferential deviation of neighbor arc contours,radial deviation of neighbor arc contours,angle of inclination between the V-groove and small cylinder,and curvature of the obtained *** results show that the matching coefficient is enhanced by 98%,the Euclidean distance of overlap parts of neighbor arc contours is reduced by 68%,the position error is reduced 27%,and the average curvature of the arc contours is *** can be concluded that the measuring quality can be enhanced prominently by this magnet combination method for the segmenting-stitching method.

关键词： Circularity and Diameter Measurement Magnets Combination Jig Small Cylinder segmenting-stitching method

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维普期刊数据库

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