Electrochemical cutting of mortise-tenon joint structure by rotary tube electrode with helically distributed jet-flow holes  

作　　者：Tao YANG Xiaolong FANG Xiaoyun HU Zhengyang XU Yongbin ZENG 

机构地区：[1]Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

出　　处：《Chinese Journal of Aeronautics》2022年第2期376-387,共12页中国航空学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.91960204);the Natural Science Foundation of Jiangsu Province(No.BK20191279);the Aeronautical Science Foundation of China(No.201907052002);the National Natural Science Foundation of China for Creative Research Groups(No.51921003)。

摘　　要：In aero-engines,mortise-tenon joint structures are often used to connect the blades to the turbine disk.The disadvantages associated with conventional manufacturing techniques mean that a low-cost,high-efficiency,and high-quality nickel-based mortise–tenon joint structure is an urgent requirement in the field of aviation engineering.Electrochemical cutting is a potential machining method for manufacturing these parts,as there is no tool degradation in the cutting process and high-quality surfaces can be obtained.To realize the electrochemical cutting of a mortise-tenon joint structure,a method using a tube electrode with helically distributed jet-flow holes on the side-wall is proposed.During feeding,the tube electrode rotates along its central axis.Flow field simulations show that the rotational speed of the tube electrode determines the direct spraying time of the high-speed electrolyte ejected from the jet-flow holes to the machining area,while the electrolyte pressure determines the flow rate of the electrolyte and the velocity of the electrolyte ejected from the jet-flow holes.The machining results using the proposed method are verified experimentally,and the machining parameters are optimized.Finally,mortise and tenon samples are successfully machined using 20 mm thick Inconel 718 alloy with a feeding rate of 5μm/s.

关 键 词：Electrochemical cutting Helically distributed holes Jet-flow holes Mortise-tenon joint structure Rotary tube electrode 

分 类 号：V263[航空宇航科学与技术—航空宇航制造工程]