整体叶盘叶片型面高精度六轴检测与误差补偿方法研究

Research on High-precision Six-axis Detection and Error Compensation Method for Blisk Blade Profiles

为提高三坐标测量机对整体叶盘的测量效率和精度,解决大尺寸整体叶盘超出测量机量程等问题,构建了基于三坐标测量机和高精度转台的六轴测量系统。依据空间坐标变换原理建立了转台坐标系与叶盘工件坐标系的数学模型,提出了一种整体叶盘不同叶片坐标系随转台旋转后的空间误差补偿方法。检测结果表明,在保证每个叶片型面参数测量精度满足工艺要求的前提下,测量效率平均提高了28.22%。对比未配置转台的测量数据,新的六轴测量系统测量水平整体叶盘叶片型面轮廓对比误差基本在0.008 mm以内,最大对比误差小于0.015 mm,比测量倾斜整体叶盘的误差更小且更稳定。

In order to improve the measurement efficiency and accuracy of the overall blisk by CMM and to solve the problems that large-sized blisk exceeded the measuring range of measuring machine,a six-axis measurement system was constructed based on CMM and a high-precision turntable.According to the principle of space coordinate transformation,a mathematical model of the turntable coordinate system and the blisk workpiece coordinate system were established.A space error compensation method was proposed after the coordinate systems of different blades of the blisk rotated with the turntable.Test results show that the measurement efficiency increases by 28.22%on average under the premise of ensuring that the measurement accuracy of each blade profile parameter meets the process requirements.Compared with the measurement data without the turntable,the new six-axis measurement system measures the horizontal blisk blade profile,and the profile comparison errors are almost all within 0.008 mm.The maximum comparison error is less than 0.015 mm,which is smaller and more stable than the measurement errors of the inclined blisk.