整体叶盘测量机参数标定的关键技术

为解决整体叶盘生产过程中原位检测的问题,设计了专用的关节臂式坐标测量机.该测量机采用具有直线-直线-旋转运动的结构形式,在有限的运动空间内实现了较大范围的测量,满足了测量需求.为标定测量机直行轴与旋转轴之间的平行度误差,提出用平台和方尺作为水平面和铅垂面的实物体现的标定方法,该方法简便易行.经过标定与误差补偿,测量机的测量不确定度小于0.01 mm,符合设计要求.标定结果良好的重复性证明了该方法的正确性.

Key Technologies for Calibrating Parameters of a Bladed Disk Measuring Machine

To detect a bladed disk in-situ during its production, a dedicated articulated arm coordinatemeasuring machine （CMM） was developed. The structure of the machine was realized by a combinationof linear-linear-rotational motions, which makes it possible for the machine to cover a large measurementrange within limited room for mounting, so that the demands of the task can be met. To calibrate the par-allelism between the linear and the rotational axes of the machine, a new method was put forward. In thismethod, a fiat plate is used as the physical implementation of the horizontal plane, and a mechanicalsquare serves as the vertical reference. After calibration and error compensation, the uncertainty of themachine is less than 0. 01 mm, which can meet the design requirements. The method is easy to carryout, and its validity is proved by the good repeatability of calibration results.