基于视觉原理的直槽丝锥径向几何参数测量方法研究  

Research on the measurement method of axial geometric parameters of straight groove taps based on vision principle

作　　者：李昊泽 刘永[1] 王宸[1] 王红霞[1] 姜都 龚立雄[2] LI Haoze;LIU Yong;WANG Chen;WANG Hongxia;JIANG Du;GONG Lixiong(College of Mechanical Engineering,Hubei University of Automotive Technology,Shiyan 442002,CHN;College of Mechanical Engineering,Hubei University of Technology,Wuhan 430068,CHN)

机构地区：[1]湖北汽车工业学院机械工程学院,湖北十堰442002 [2]湖北工业大学机械工程学院,湖北武汉430068

出　　处：《制造技术与机床》2023年第10期145-150,157,共7页Manufacturing Technology & Machine Tool

基　　金：国家科技重大专项项目(2018ZX04027001);教育部产学合作协同育人项目(202002108003,202101124026);教育部人文社科资助项目(20YJCZH150);湖北省高等学校优秀中青年科技创新团队计划项目(T2022027);汽车动力传动与电子控制湖北省重点实验室基金资助项目(ZDK1201703);湖北汽车工业学院博士基金资助项目(BK201905)。

摘　　要：针对目前丝锥测量方法测量参数单一、需人工操作的问题,提出了一种基于视觉原理的直槽丝锥径向综合多参数自动测量方法。通过预处理得到丝锥极坐标下的径向轮廓图。对端面刃背到几何中心的最大、最小极径像素拟合圆,得到端部和芯部直径。通过拟合特征曲线,得到两对直线方程,利用夹角公式得到前角和后角值。计算刃背首末像素点间距离得到刃背宽度值。将刃背首末像素极径差值作为铲背量。实验结果表明:对M10丝锥进行10次重复性测量,上述几何参数的测量相对误差均在0.58%之内,平均耗时7 s,能满足高精度、高效率、多参数自动测量的工程需求。A new measurement method of straight slot tap radial comprehensive multi-parameter based on vision principle was proposed aiming at the problems of single measurement parameter and manual operation in the current tap measurement method.The radial profile map of the tap in polar coordinates was obtained by preprocessing.The end and core diameters were obtained by fitting a circle to the pixel with the maximum and minimum polar diameter back to the geometric center of the end edge.By fitting the characteristic curve,two pairs of line equations were obtained,and the angle formula was used to obtain the front angle and back angle values.The width of the edge back was obtained by calculating the distance between the first and last pixels of the edge back.The pole diameter difference of the first and last pixel of the edge back was taken as the shovel back amount.The experimental results show that the relative errors of the above geometric parameters are within 0.58%,and the average time is 7 s,which can meet the engineering requirements of high-precision,high-efficiency and multi-parameter automatic measurement.

关 键 词：视觉测量 直槽丝锥 几何参数 

分 类 号：TG722[金属学及工艺—刀具与模具] TP391.41[自动化与计算机技术—计算机应用技术]