Preparation Of Laminated Disk Electrode And Microstructure Of Rotary Electric Discharge Machining

With the increasingly prominent problems such as environmental pollution and energy crisis,surface functional structures with energy-saving and drag reduction functions have become one of the academic research hotspots.In order to efficiently prepare micro-groove surfaces with hydrophobic,drag reducing and other functions,this paper proposes a rotating disk electrical structure using laminated disk electrodes.Different metal electrode materials have different processing effects.The disc foils with the same outer diameter and different loss rate are prepared,and the disc foils with different loss rates are laminated according to the microstructure appearance contour requirements,and then multiple rounds are fixed at different positions of the workpiece.The deep molding makes the microstructure cross-section contour processed by the laminated electrode tend to be stable,and the laminated electrode with stable processing effect is used for processing of the microstructure.In this paper,two kinds of metals with different processing properties,such as copper and tin,were selected for research.In order to make the research results more comprehensive,the diffusion characteristics of copper and tin at high temperature were also analyzed,and copper-tin alloy electrodes with processing properties between copper and tin were prepared by using this feature.Through research,the process eliminates the problem that the electrode loss affects the machining accuracy in the traditional EDM process,and does not need to be modified before machining,which improves the machining efficiency and machining accuracy.The main contents of this paper are as follows:(1)The selection,preparation,and manufacturing steps of the laminated electrode will be described in detail.The platform that meets the experimental requirements is built and the experimental instruments mainly used in this study are introduced.(2)Prepare 12 sets of tin-plated copper foil samples with different holding time and processing temperature.By analyzing the distribution trend of tin elements in the samples,it is found that the diffusion of tin in tin-plated copper foil increases with the heat preservation temperature and the holding time of vacuum heat treatment.And increase.According to the diffusion rule of the tin-plated copper foil,a copper-tin alloy electrode raw material is prepared.(3)Using a copper disc,a tin disc and a copper-tin alloy disc and a laminated electrode composed of the same,the titanium alloy was processed to the same depth on the experimental platform,and the volume loss of the same material electrode was compared,and the lamination processing method was changed.The electrode loss characteristics of some materials in the laminated electrode,and the processing ability of the copper-tin alloy disk electrode in the laminated electrode are improved.(4)Using a laminated electrode composed of copper,tin,copper-tin alloy to perform multi-wheel fixed-depth rotary electric discharge machining at different positions of the titanium alloy workpiece,comparing the relative volume loss rate of each material after each processing and each disk electrode Radius loss,it is found that the relative volume loss rate of the copper-tin alloy disk electrode is changed from greater than 1 to less than 1 after processing to the fifth micro-trench,and the radius loss of each disk electrode approaches after multiple rounds of processing.At the same value.Using this rule,the laminated disk electrode machining model was extracted,and a 0.1 mm thick copper disk,a 0.1 mm thick copper-tin alloy disk,and a 0.3 mm thick tin disk were used to form Cu/CuSn/Sn/CuSn/Cu.Cu/Sn/Cu laminated disk electrode composed of laminated disk electrode and 0.1 mm thick copper disk and 0.5 mm thick tin disk for multi-round rotary electric discharge machining experiments,verifying laminated disk electrode rotating electricity The feasibility of spark machining microstructure.