静叶片四轴数控加工定位分析

Positioning Analysis of Four-axis NC Machining for Static Blades

汽轮机静叶片汽道加工是静叶片加工的关键工序之一。针对汽轮机静叶片结构特征、加工技术和工件定位原理,研究汽轮机静叶片加工工艺过程中四轴加工夹具和工件坐标系原点的定位计算,在满足零件的精度及表面粗糙度要求的同时,扩大了四坐标联动数控机床使用范围,避免了三坐标和五坐标联动数控加工存在的干涉问题,保证了汽轮机静叶片加工质量,提高了静叶片的加工效率和刀具耐用度。

Processing of steam path is one of key processes of the turbine stator blade machining. The four axis machining fixture and the calculation of the origin of the workpiece coordinate in the turbine stator blade machining process were researched, by aiming at the turbine stator blade structural characteristics, processing techniques and workpiece positioning principle. At the same time of meeting requirements of parts＇ precision and surface roughness, the application range of four-axis CNC machine tools is expanded. In- terference in three coordinate linkage NC machining and five coordinate linkage NC machining is avoided. The turbine stator blade ma-chining quality is ensured, and the processing efficiency of the stator blade and tool life are improved.