压气机叶片型面精密数控铣加工技术应用研究

为了提高压气机叶片型面和进、排气边转接圆角的数控铣加工质量,在工艺、夹具、数控加工模型与程序以及检测方法等方面采取了攻关措施,减小了叶片型面精铣加工的变形,实现了叶身型面的精密铣削加工,对型面采用毡轮修光去除铣削痕迹后,经过3坐标、小半径投影仪等设备的测量,进、排气边转接圆角的形状和型面轮廓度、位置度各项要求的加工质量得到了质的提升,其合格率由20％提高到75％以上,加工效率和刀具耐用度提高1倍以上,使叶身型面精密铣削技术具备了精品叶片批量生产的工程化应用技术基础.

Investigation on Precision NC Milling Technology of Compressor Blade Surface

In order to improve the machining quality of the compressor blade surface and the leading and trailing edge radius, through taking measures on the technique , clamp, NC model and program and inspection technology etc, the precision milling deformation of the blade surface was reduced, and the high precision milling of the blade surface was achieved. The milling trace of blade surface was removed by felting mop and polishing. The machining quality of the leading and trailing edge radius , the surface profile error and position degree were improved obviously by the measurement of three coordinate and small radius projector. Its qualified rate increased from 20% to75%, and the processing efficiency and tool life has increased by more than 100 percent. The blade surface precision milling technology lays the foundation of top quality blade for mass production in engineering application.