摘要
为了提高电火花放电雾化烧蚀加工效率,以烧结金刚石材料作为加工电极,利用金刚石颗粒的磨削作用实现了高效雾化烧蚀与机械磨削的复合加工.其中,通过测量加工过程中金刚石颗粒与工件之间的机械磨削作用力,实现了基于压力信号检测的伺服控制,以保证金刚石颗粒的磨削作用,并采用反比例、模糊和比例-积分-微分(PID)压力控制方法来维持加工过程中的压力稳定性.同时,以高强钢Q420C为加工对象进行了3组加工效率对比试验.结果表明:采用PID压力控制方法,在30min的加工时间内所得加工深度可达14.5mm,最大压力在1.0N以内,其加工效率和加工稳定性优于其他2种控制方法.
To improve the efficiency of electrical discharge machining(EDM)ablation,this paper uses a sintered diamond electrode as the machining electrode,making use of grinding action of diamond particles,to achieve machining combined with high efficiency ablation and mechanical grinding.In the study,through gathering mechanical grinding force during machining,a control method based on force signal is proposed to ensure diamond particles grinding.In order to maintain the stability of pressure in the process,three control methods are proposed:inverse proportional control,fuzzy control and PID control.In addition,we use high strength steel as the workpiece and conduct three groups of machining efficiency comparative experiments.From these three groups of experiments,we conclude that the machining depth can reach to 14.5 mm and the force range is less than 1.0 Nby using PID control method.PID control method has advantages over the other two in machining efficiency and stability.
作者
邱明波
史璟云
俞晓春
刘志东
QIU Mingbo;SHI Jingyun;YU Xiaochun;LIU Zhidong(College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2019年第1期111-117,共7页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金(51675272
51575271)资助项目
