非导电超硬材料电火花铣削直流电动机伺服控制系统  

Study on Servo Control System of DC Motor for Electrical Discharge Milling of Nonconducting Superabrasives

作　　者：赵焕卿[1] 刘永红[1] 

机构地区：[1]中国石油大学(华东)科技开发公司,山东东营257061

出　　处：《组合机床与自动化加工技术》2007年第8期51-55,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金资助项目(50675225);高等学校博士学科点专项科研基金资助项目(20040425504)

摘　　要：直流电动机伺服控制系统是非导电超硬材料电火花铣削技术中的一个核心部分,它对非导电超硬材料电火花铣削的效率、精度、表面质量和加工成本等都有很大的影响。文章在对该加工技术的工作原理和特点等进行分析研究的基础上,研制出了直流电动机伺服控制系统,对该控制系统中的功率放大、PWM脉宽调制和驱动保护等电路的设计原理、构成和工作特性等进行了理论分析与试验研究。试验结果表明:该直流电动机伺服控制系统具有结构简单、可靠、跟踪精度高、系统响应速度块、调速范围宽、低速稳定性好等优点,可满足非导电超硬材料电火花铣削加工的要求。Servo control system of DC motor is a key part for electrical discharge milling of nonconducting superabrasives. It is a major factor affecting efficiency, machining precision and surface quality. On the basis of analyses and study on working principle and characteristics for the machining technique, the servo control system of DC motor for the process is developed. The design principle, constitute and working characteristics of the power amplifying circuit, pulse width modulation （PWM） circuit and driving protection circuit for the ser- vo control circuit are studied in this paper. The experimental results show that the servo control system of DC motor is simple：, reliable, high precision in track, quickly responds to speed, widely speed regulation, good stability in low speed. The servo control system may meet the demand for electrical discharge milling of nonconducting superabrasives.

关 键 词：非导电超硬材料 电火花铣削 伺服控制 脉宽调制 直流电动机 

分 类 号：TG661[金属学及工艺—金属切削加工及机床] TG5