Overview on Five-Axis Precision EDM Techniques

In recent years, with the development of the researches on aviation, space and energy fields, integral impeller, blisk, shrouded turbine blisk and hooded impeller have been used more and more broadly. The construction of these key parts is complex. Their weight is lighter than before. Their structural strength is enhanced. Their reliability and efficiency are greatly improved. And these parts are made of anti-high temperature and corrosion resistance materials. These characters make it difficult to machine them precisely. In this paper, five-axis EDM equipment is developed to solve this problem. Based on this equipment, the processing techniques of integral impeller, blisk, shrouded turbine blisk and hooded impeller are researched. And the electrodes are designed. The discharge conditions and machining trajectories are optimized. Finally, the eligible work pieces such as shrouded turbine blisk and hooded impeller have been made by using the research result.