一、问题的提出大型机械零件两孔同轴度的测量是个难以解决的问题,它既要解决定向误差的测量,又要解决定位误差的测量。我们在实际工作中采用光学工具技术对大型工件的两孔同轴度进行测量,解决了生产中的这一问题。测量中主要使用了自行设计制造的“光学目标标准轴”及“耙轮”等专用工具(如图1所示)。 First, the problem put forward Large-scale mechanical parts measuring the coaxiality of two holes is a difficult problem to be solved, it is necessary to solve the measurement of directional error, but also to solve the positioning error measurement. In practical work, we use optical tools to measure the coaxiality of two holes in large workpieces and solve this problem in production. The measurement mainly uses special tools such as “optical target standard axis” and “rake wheel” which are designed and manufactured by itself (as shown in FIG. 1).