电液束加工特性及小孔形貌控制技术研究

Study on Characteristcs of Electro Stream Machining and Controlling Technology of Hole Morphology

论述了一种用于航空发动机单晶涡轮叶片气膜孔加工的工艺技术--电液束加工技术。重点从电液束加工机理、工艺对单晶基体组织的影响、孔口形貌特征及控制方法等几方面进行了详细阐述,尤其是针对几种典型的孔口缺陷提出了有效的工艺控制方法,确保了气膜孔加工的表面质量,获得了质量良好的孔口形貌。

A technique of electro stream machining used to process the film cooling holes of single crystal turbine blade of aero-engine is described. The mechanism of electro stream machining, the effect of technology on the microstructure of single crystal matrix, the characteristics of orifice morphology and the control method are described in detail. In particular, an effective process control method is proposed for several typical orifice defects to ensure the surface quality of film cooling holes and obtain good orifice morphology.