基于几何特征分解和环状切片的整体叶轮五轴混合加工工艺规划方法

Five-Axis Additive-Subtractive Hybrid Machining Process Planning Method for Blisk Based on Geometric Feature Decomposition and Annular Slicing

整体叶盘、叶轮等航空发动机零件形状复杂、精度要求高,对传统加工方法提出了很大挑战。混合加工技术结合了增、减制造技术优点,是解决复杂零件加工问题的有效手段。针对以上问题,基于几何特征将叶轮分解为叶片与叶盘两个部分,利用五轴环状切片方法规划了叶轮的增减材混合加工工艺,并在自主搭建的五轴混合加工平台基础上,对叶轮进行了加工试验,验证了该混合加工工艺规划方法的可行性。

Aero-engine parts such as blisks and impellers have complex shapes and high precision requirements,which pose great challenges to traditional processing methods. Additive-subtractive hybrid machining method can be used to machine before obstacles formed, which is an effective way to solve complex part processing problems. In view of the above problems, the impeller is decomposed into two parts, the blade and the disc based on geometric features. The fiveaxis annular slicing method is used to plan the additive-subtractive hybrid machining process of the impeller. Based on an self-built five-axis hybrid processing platform, an impeller was processed and tested to verify the feasibility of the hybrid processing planning method proposed in this paper.