回转体测量机热变形误差三截面法补偿技术
Three-Section-Theory Online Thermal Deformation Error Compensation Technology of Rotor Measuring Machine

为了补偿复杂外形回转体测量机在生产现场的热变形误差，使用实物参考基准作为标定物，提出了三截面 法热变形误差在线补偿技术．根据回转体测量机的结构特点，使用数字仿真分析了热变形形式，然后以此为依据建 立了热变形误差补偿模型．通过测量两个参考基准的截面和被测工件的一个待测截面的数据，计算得到补偿模型中 的参数，进而获得热变形误差的补偿量，实现了在线补偿，无需建立复杂的热变形模型，简单易行．现场测量实验 证明了三截面法的可行性，重复性误差降低到 8,μm，能够满足复杂环境下的测量任务．
At the production site，rotor measuring machine with complex shape has thermal deformation error. To compensate for this error，three-section-theory online thermal deformation error compensation technology was devel- oped，which uses physical reference point as calibration object. According to the structural characteristics of the rotor measuring machine，the thermal deformation of the machine was analyzed by digital simulation. Then the thermal deformation error compensation model was set up. In order to obtain compensation for thermal deformation error， three sections of the standard parts and workpiece were measured. As a result，the online error compensation was realized without establishing complex thermal deformation model. Experiments proved the feasibility of the three- section-theory and repeatability error is reduced to 8,μm. So the method is useful in complex environment