曲线三坐标测量机的自适应测量方法及应用  

The Adaptive Measuring Method and Application of CMM on Curves

作　　者：顾承扬[1] 李文龙[1] 熊有伦[1] 

机构地区：[1]华中科技大学数字制造装备与技术国家重点实验室,湖北武汉430074

出　　处：《装备制造技术》2010年第12期1-4,共4页Equipment Manufacturing Technology

基　　金：国家自然科学基金重点项目(50835004);国家863科技项目(2009AA04Z149);国家科技重大专项(2009ZX04014-052)

摘　　要：为了提高三坐标测量机自动跟踪测量效率、避免测量过程中出现采样信息不充分或采样信息冗余的情况,在圆弧插值测量法的基础上,对测量路径的步长和进给方向进行了优化,提出了一种新的自适应测量方法,可实现在曲率小的地方,采样点相对分散,在曲率大的地方,采样点相对密集,使得测点整体分布较为平均,仿真结果验证了该方法的可行性和有效性,最后将该方法应用于汽车发动机典型零部件凸轮轴形线测量中,以提高接触式测量效率和逆向设计精度。In order to improve the automatic tracking measurement efficiency of the coordinate measuring machine（CMM）,and avoid insufficient or redundant sampling points,this article optimizes the path of measurement and the moving direction of the probe on the base of circle interpolation,and puts forward a new adaptive measurement method,which can get dispersed points in place of low curvature,while dense points in place of high curvature,achieving an evenly distributed sampling points.The simulation results verify the feasibility and effectiveness of the method.Finally,it is applied in the shape measurement of camshaft so as to improve the efficiency of contacting measurement as well as the reverse design accuracy.

关 键 词：三坐标测量机 曲率连续 自适应测量 凸轮轴 

分 类 号：TG8[金属学及工艺—公差测量技术]