电火花线切割机床数控系统及关键控制功能设计  

Design of CNC System and Key Parts of WEDM Machine Tool

作　　者：雷瑛[1] 李达[2] 罗森怡 LEI Ying;LI Da;LUO Senyi(School of Mechanical Engineering,Xi’an Jiaotong Engineering University,Xi’an 710300,China;School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu 614202,China)

机构地区：[1]西安交通工程学院机械工程学院,陕西西安710300 [2]西南交通大学材料科学与工程学院,四川成都614202

出　　处：《微型电脑应用》2022年第8期8-10,共3页Microcomputer Applications

基　　金：四川省国际交流合作项目(2019YFH0048)。

摘　　要：设计电火花(EDM)线切割机床数控系统(CNC)整体及关键部件。数控系统功能包含电机运动控制信号输出、处理下位机信号反馈以及IO开关量控制。对电机运动进行控制可以对数控系统加工进给其位置进行精确调节。根据电火花线切割加工方法的特点,步进电机通常都被控制在很慢的运行速度,选择匀加速方式来实现加减速控制。该总线收发器可以实现高效通信并具备很强的抗电磁干扰性能,可以对多路信号进行分时或双向传输,使系统达到良好的抗干扰能力。设计本数控系统时,可以利用光电耦合器将限位开关信号直接上传到CPLD的引脚中。考虑到限位开关信号并不需要满足很高的实时性。Electromagnetic distance measurement(EDM)wire cutting machine tool computer numerical control(CNC)system and the overall design of key components are presented.The numerical control system includes the following functions:motor motion control output,signal feedback of lower computer and IO switching control.By controlling the motor motion,the machining feed and position of CNC system can be precisely adjusted.According to the characteristics of EDM machining method,stepper motor is usually controlled at a very slow speed.The numerical control system transmits IO switch quantity control command through the upper computer software,and sends it down to complex programming logic device(CPLD),which transmits the obtained signal to the switch quantity port after processing.When designing the numerical control system,the limit switch signal can be directly uploaded to the pin of CPLD by means of photoelectric coupler.Consideration of the limit switch signal does not need to meet the high real-time.

关 键 词：电火花 线切割 数控系统 设计 

分 类 号：TH137[机械工程—机械制造及自动化]