用七轴并联机床加工叶片及后置处理技术

根据六轴并联机床加工汽轮机叶片存在的问题，提出在机床工作台上串联一个数控转台，实现七轴联动，以提高叶片加工的质量和效率，并提出了用七轴并联机床加工叶片的加工方案和加工工艺；提出了利用Uni-graphics(UG)进行叶片的辅助加工，包括生成叶片的三维造型、进行刀具轨迹编程和加工仿真；提出了在UG/POST的基础上开发面向并联机床的后置处理器的方法，以及七轴并联机床加工的后置处理算法。

Research on Techniques of Machining Vane by Seven-Axis Parallel Kinematics Machine and Post Processing

On the basis of analysis of machining the vane of steam turbine by six-axis parallel kinematics machine (PKM) , a NC revolvable table is attached to the worktable of the six-axis PKM to improve machining quality and efficiency, and the vane are machined through the joint movement of the seven axis. Moreover, the machining techniques and schemes are presented. Unigraphics(UG) CAM technologies for vane are discussed,including the 3-dimensional modeling, tool path programming and machining process simulation. Subsequently, this paper puts forward the way to develop a special postprocessor for PKM on the basis of UG/Post and the post processing arithmetic for machining by seven-axis PKM.