Basic Research On Hybrid Processing Of Electrochemical Jet Machining And Laser Beam Machining

Hybrid processing of electrochemical jet machining (EJM) and laser beam machining (LBM) is a new processing method, which obtains high efficiency of LBM and high surface quality of EJM. The course of EJM-LBM are that: the recast layer, heat affected zone and microcrack caused by LBM are removed by EJM, and radicalization of laser can accelerate the electrochemistry effect and enhance the localization of EJM, and besides LBM and electrochemical machining , action of thermochemistry and other effect may remove the material. The main research contents are as follows:(1) The transmission properties of laser in medium are investigated, and experimental research on laser-induced mechanical effect in air, pure water and electrolyte is carried out. The results indicate that: laser-induced mechanical effect of metal target in the short distance liquid is three times more than that in air, and this is beneficial to remove the melt; the transmission effect of laser in the filtrated electrolyte approaches that in pure water.(2) Based on the properties of laser attenuation in the electrolyte, the transmission properties of laser in jet and principle of jet stability, the special EJM-LBM test system is designed and manufactured, and the fluid dynamics properties of coupling jet cavity and nozzle are simulated by CFD software.(3) The experimental study of shaping law is carried out by using the EJM-LBM test system,. First, the basic EJM experiment is conducted, and the influences of the machining parameters on surface quality and machining efficiency are investigated, and the shaping law of EJM is analyzed. Second, based on the experimental study of EJM, the basic experiment of EJM-LBM is carried out, and the results indicate that: the cliffs of holes obtain high surface quality and the recast layer, heat affected zone and micro-cracking are eliminated basically.According to the above theoretical analysis and experimental investigation, the feasibility of EJM-LBM is verified. The research provides the experimental foundation for the further development.