大型定子叶片铸件的数字化测量及误差评定

随着航空、航天、船舶、汽车和模具工业的飞速发展，复杂曲面的数字 化测量与误差评定技术对曲面加工精度起着越来越重要的作用。利用激光跟踪测量设备对大 型定子叶片铸件进行了数字化测量，对测量点云进行了去噪、精简等数据处理，并将测量点 云与理论模型进行了基准匹配，计算出了定子叶片铸件各部位的误差分布，实现了对大型定 子叶片铸件的误差评定；测量及误差分析结果可以用于优化叶片在后续加工中的装夹姿态， 使叶片各部位的加工余量趋于均匀，有效提高产品制造精度和加工效率。

Digital Measurement and Tolerance Evaluation of theLarge Stator Blade Casting

With the rapid development of aviation, aerospace, vessel, automobiles and mold industry, the complex surface digital measurement and the technology of tolerance evaluation plays an increasingly important role in the accuracy of surface machining. Large stator blade casting is carried on digital measuring with a laser tracking measurement device, and the measuring points cloud is denoised and reduced. The measurement points cloud and the theory model are matched. The tolerance evaluation and errors of large stator blade castings are calculated. Results of measurement and the error analysis can be used in the optimization of the clamping position for the large stator blade casting in the subsequent processing, making the machining allowance for each part of the blade be more uniform, and improving the processing efficiency and precision manufacturing effectively.