关键词: 整体喷嘴环, 清根加工, 电火花加工, 电极设计, 加工轨迹

Abstract: To solve the problem of new type of transition fillet machining between the Static Blade Ring blade and the platform,the static blade ring EDM clean-up machining technology was researched by using the combination machining process of CNC milling with Electrical Discharge Machining (EDM).A special electrode design method for EDM clean-up machining was proposed.The strategy of circumferential compression and radial compression was adopted,and the optimal direction of radial compression was defined and solved,so that the electrode volume could be adjusted in a certain range while retaining the shape of the transition fillet region of the channel.A design method of electrode movement trajectory was proposed,which could obtain the interference-free trajectory quickly by utilizing the moving space boundary.The experimental results showed that the processed transition fillet met the design requirements,and the EDM could realize the processing of the special transition fillet area which was difficult to process by CNC milling.

Key words: static blade ring, clean-up machining, electrical discharge machining, electrode design, processing path