Optimization of Servo Trajectory Algorithm in Block-divided EDM of Film Cooling Holes with Diffusion Structure
Film cooling holes spray cooling gas to form a protective film on a turbine blade for heat insulation and heat dissipation,so as to ensure that the aeroengine turbine blade works in the environment of high pressure and high temperature higher than the melting point of its material.The film cooling holes with composite angular outlets as diffusion structures can obtain better cooling performance.It is a new method to machine the diffusion structures by using the block-divided machining with a rod rectangular-section electrode.The method has the advantages of low cost of electrode,easy renewal of working fluid,and continuous processing.In order to solve the trajectory error problem of tool electrode 3D servo feed in the block-divided machining,a trajectory error correction algorithm was proposed.Furthermore,the algorithm parameters were optimized through experiments.Machining experiments of typical film cooling hole verified that the optimized trajectory correction algorithm can improve the machining accuracy.
film cooling holeEDMblock-divided machiningcomposite angular diffusion structuretrajectory correction algorithm
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维普
