微机控制窄间隙熔化极脉冲氩弧焊焊缝自动跟踪系统

MICROCOMPUTER WELD JOINT TRACKING CONTROL IN NARROW GAP WITH PC-MIG WELDING

从小直径厚壁钢管窄间隙熔化极脉冲氩弧焊的生产实际出发,设计了一种以窄间隙坡口棱边为轨迹的新型跟踪传感器——光电数字传感器。该传感器利用坡口棱边效应,将间隙中光源发出的连续光信号离散成数字形式的光信号,从而能定量给出偏移量的大小,具有跟踪精度高、占用焊缝周围空间小、电路简单、抗干扰能力强等特点。采用这种新型的光电数字传感器,配以单板计算机为主体组成实时跟踪控制系统,并使跟踪与焊枪摆动一体化,有效地实现了对小直径厚壁钢管窄间隙焊的高精度焊缝跟踪和保证良好的侧壁熔合。

In order to get a sound weld in narrow gap welding, a new tracking sensor, the photoelectrical digit sensor, has been developed, This sensor has the advantages of high controlling accuracy, less space taking up, simply constructed circuit and powerful anti-interference. With the help of the edge effect of I-groove, the sensor can convert the continuous photosignal into digit signal and get the deviation of welding torch quantitatively. By combining the new sensor with a microcomputer as the main body, a real-time tracking control system can be made. This system effectively ensures high accuracy tracking and complete sidewall fusion in narrow gap welding.