Research On Pulse Electrochemical Compound Finishing Technology

Due to the production problems such as poor quality, low efficiency during machining of complex surface, traditional mechanical finishing is unable to adapt to the demands of the high precision and the quality surface of parts. Pulse electrochemical compound finishing technology removes the metal from the surface by electrochemical dissolution with less cutting force and heat, so there is no cutting mark, plastic deformation layer on the surface of the parts compare to traditional machining. Therefore it can greatly reduce the values of surface roughness and improve the surface quality of parts. On the basis of building experimental foundations and through massive experiments, we made deep research on the pulse electrochemical compound finishing technology in this paper.The equipment of pulse electrochemical compound finishing was constructed, the removal and the rotary manual finishing accessories were designed separately, and the revolving conductor appliance was developed for the testing. Selecting appropriate attrition level and carrying a series of basic technology experiments on mold material 718H and NAK80, two kinds of electrolyte which suit this kind of material were obtained. There are many merits, such as the low cost, non-toxic, the remarkable effect, the good performance of them. With contrast experiment between direct-current and pulse current electrochemical compound finishing, the result indicated that this technology can improve the scrap emission condition and enhance their surface quality effectively, because this technology improved the finishing electrochemical flow field and mixed round the electrolyte.On this paper, the pulse electrochemical compound finishing technology parameters which influence the finishing surface roughness was paid attention to, such parameters include the pulse frequency, the duty factor, the peak voltage, the finishing time and so on. Then basic craft rule of two kinds of mold material in finishing process were obtained, and each kind of parameter in this craft was optimized by means of the orthogonal experiments.Finally, combining with the CAD/CAM, the NC processing simulation of the complex surface was carried on by the Pro/E software technology, the paper makes prophase preparation for promoting the pulse electrochemical compound finishing technology to the three dimensional complex surface machining. It aims at making the study of this technology deeper and the application area broader.