摘要
以运动控制卡对转动惯量小、响应速度快的交流伺服电机控制为核心,采用缓冲器为桥梁,研制了等速送丝和推拉送丝相结合的CO2推拉送丝系统.设计了基于编码器速度负反馈的PWM送丝调速电路,可以有效补偿负载变化和电网电压波动造成的转速变化,控制精度高、送丝稳定.以交流伺服电机为基础,设计了推拉送丝机构,实现了焊丝的送进—回抽.根据推拉送丝CO2焊接的特点,设计了焊丝的运动曲线,通过对运动控制卡的编程实现了焊丝的实时送进—回抽控制.该系统抗干扰能力强、工作稳定,最高推拉送丝频率可达90 Hz.
A push & pull feeding system with real-time control for CO2 welding was proposed and achieved.It utilizes the motion controller to control AC servo motor with the low moment of inertia,fast response,and the buffer to connect the constant feeding part and the push & pull feeding part.The PWM feeder speed control circuit with speed negative feedback by rotate coder was designed to compensate the speed fluctuation caused by the system load and supply voltage changing.The push & puller feeding mechanism was designed to push & pull the wire based on the AC servo motor.According to the characteristics of CO2 welding with push & pull feeding system,the feeder speed curve is pre-designed.The wire motion was managed by the real-time control software written in the motion controller.The system has good ability in anti-jamming and stability.The highest feeder frequency with push & pull process can reach 90 Hz.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2009年第5期101-104,共4页
Transactions of The China Welding Institution
