Experimental Study On Surface Processing Of Microarray Structure Based On Low-speed Wire Turning EDM

With the rapid development of processing equipment in aerospace,automobile,communication,biology,national defense,medical treatment,microelectronics and other important fields,micro-scale processing is the inevitable development direction of industry in the 21st century.In this paper,the rotating system is constructed on the low-speed wire EDM machine CA20 with five-axis,which realizes the processing of local micro rotary structure.The main contents of this paper are as follows:(1)The simulation model of the single-pulse and electric heating temperature field in LS-WEDT is established.The problem of phase change in titanium alloy temperature field simulation is solved.The temperature variation along the radius and depth direction of the discharge pit under the action of moving heat source is analyzed,and the influence of velocity parameters on the temperature field distribution and the pit size of single pulse discharge is analyzed,and the influence law on the surface quality is obtained.(2)To study the effects of different electrical and non-electrical parameters on the surface quality(roughness)and working efficiency(MRR)of LS-WEDT.The single factor test is completed to analyze the influence of different technological parameters on the surface quality(roughness)and processing efficiency(MRR)of different processed materials.Orthogonal tests are carried out by selecting the process parameters with obvious influence,and the technological methods and technological parameters to ensure the quality(roughness)and efficiency(MRR)of machining are put forward.(3)To study the experimental study of micro-rotating groove and spiral groove of different materials with different electrical and non-electrical parameters.The effects of different electrical and non-electrical parameters on the average width and the consistency of the width of rotary slots and helical grooves are analyzed.The response surface methodology is designed and the multi-objective optimization is carried out by genetic algorithm,so as to obtain the process parameter combination which ensures machining size and machining accuracy.(4)The geometrical kinematics analysis of LS-WEDT is completed.Based on UG software,different microarray simulation processes are carried out,and experimental processing is carried out to obtain different microarray structures of typical materials.In this paper,with a combination of theoretical study,finite element simulation and experimental method,the exploration of low-speed wire electrical discharge wire-cutting processing mechanism and the key technology problem of rotary microarray processing is completed.Also,it’s beneficial to expand the process of LS-WEDT,and it’s of guiding significance to the application of LS-WEDT and the improvement of the quality and precision of microarray structure machining.