Study On High-Speed Machining Stability And Tool Path Planning Of Integral Impeller

Integrated impeller is one of the key parts of aero-engine. The machining accuracy and efficiency are very important to the performance and cost of the engine. The paper is research on some problems of impeller processing technology. Have a deeper research on some problems such as milling force, milling stability and machining path planning. The main research works are as follows:1. Modeling and simulation of milling forces for ball-end milling cutter, a milling force model for ball-end mill is gained based on the relation of milling force and chip by Lee and Altintas, through the machining experiment solve out cutting force coefficient, and through MATLAB software simulation verify accuracy of model.2. Aimed to ball end mill, the dynamic milling force model taking account of regenerative chatter are deduced, and high speed cutting stability is investigated according to dynamic milling force model, give out the relation between limit axial depth and spindle speeds, and draw the stability limit diagram, which is verified by practical machining test.3. According to the difficult point of NC programming, the principle and implementation method of blade finish machining path planning is described in detail, ensure that cutter and work piece collision-free. Aimed to characteristics of blade's leading and trailing edge we get more transition cutter location is used to make normal vector of blade change continuous, that can reduce vibration condition of machine tool and meet the requirement of machining quality.