南京航空航天大学 机电学院， 南京 210016
出版日期:2019-01-28发布日期:2019-01-28作者简介:邱明波(1982-)，男，南京市人，副教授，目前主要从事特种加工、半导体放电加工和高效加工研究.电话(Tel.): 025-84892520；E-mail: qiumingbo@nuaa.edu.cn.基金资助:国家自然科学基金(51675272，51575271)Discharge Atomization Ablation Grinding Based on PID Pressure Servo Control
QIU Mingbo,SHI Jingyun,YU Xiaochun,LIU ZhidongCollege of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Online:2019-01-28Published:2019-01-28摘要/Abstract
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.
关键词: 电火花加工, 烧蚀加工, 烧结金刚石, 比例-积分-微分(PID)压力控制, 加工效率
Abstract: 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 14.5mm and the force range is less than 1.0N by using PID control method. PID control method has advantages over the other two in machining efficiency and stability.
Key words: electrical discharge machining (EDM), ablation machining, sintered diamond, PID pressure control, machining efficiency
PDF全文下载地址:
点我下载PDF
