大工件高精度内孔圆柱度的自动测量方法研究  

Research on Automatic Measurement Method of High Precision Cylindricity of Inner Hole for Large Workpiece

作　　者：郝健[1,2] 封善斋 李醒飞 HAO Jian;FENG Shan-zhai;LI Xing-fei(Tianjin University,Tianjin 300072,China;Hexagon Manufacturing Intelligence(Qingdao)Co.,Ltd.,Qingdao 266114,China)

机构地区：[1]天津大学,天津300072 [2]海克斯康制造智能技术(青岛)有限公司,山东青岛266114

出　　处：《仪表技术与传感器》2023年第2期78-83,92,共7页Instrument Technique and Sensor

摘　　要：针对非回转体类大尺寸工件的高精度内孔圆柱度测量难题,提出一种新的测量方法。通过对圆柱度误差的评定方法和采点方式的分析对比,确定比对式接触测量方式。以卫星观测跟踪支架为例,确定测量点提取方案采用鸟笼法,评价方法采用最大内接圆柱法,圆柱度测头采用高精度传感器3个截面布置,每个截面圆周均布8个传感器方式,高精度驱动机构带动测头进入内孔自动完成测量,通过圆柱度的软件算法自动计算出圆柱度,并分析测量结果,其测量误差符合测量仪器的最大允许误差为工件公差的1/10原则,测量结果完全符合工件的精度要求。整体测量方案集成三坐标测量机和圆柱度测量专机,实现整个工件的自动化智能检测。A new measurement method was proposed that solve the problem of high precision cylindricity measurement of inner hole for non-rotating large size workpieces.Through the analysis and comparison of cylindricity error evaluation method and sampling method,the comparative contact measurement method was determined.Taking the satellite observation and tracking support as an example,the bird-cage method was used for measurement point extraction scheme,the maximum inscribed cylinder method was used as the evaluation method,the cylindricity measuring head was arranged in three sections with high-precision sensors,and the circumference of each section was evenly distributed with eight sensors.The high-precision driving mechanism drove the probe into the inner hole to automatically complete the measurement,the cylindricity was automatically calculated through the cylindricity software algorithm,and the measurement results were analyzed.The measurement error complied with the principle that the maximum allowable error of the measuring instrument is 1/10 of the workpiece tolerance,and the measurement results fully met the precision requirements of the workpiece.The overall measurement scheme integrates CMM and cylindricity measuring machine to realize automatic and intelligent detection of the whole workpiece.

关 键 词：大尺寸工件 高精度内孔 圆柱度 自动测量 三坐标测量机 

分 类 号：TB92[一般工业技术—计量学]