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在对接焊中,坡口间隙的波动会导致焊接熔透状态的变化,为保证稳定的熔透,需要对焊接熔透状态进行实时检测和控制。针对CO2激光-M IG复合对接焊,建立了基于视觉传感和DSP的熔透状态实时检测与控制系统,获取了清晰的熔池背面图像,经过适当的处理得到了熔池背面熔宽的信息,并通过调节焊接速度或控制电弧电流,对熔透状态进行了控制。结果表明:即使在间隙明显波动的情况下也获得了熔透可靠、背面熔宽均匀的焊缝,从而实现了复合对接焊熔透状态的闭环控制。
In butt welding, the fluctuation of groove gap will lead to the change of welding penetration. In order to ensure the stable penetration, it is necessary to detect and control the welding penetration in real time. For CO2 laser-MIG composite butt welding, a real-time detection and control system based on visual sensing and DSP was established, and a clear image of the back of the molten pool was obtained. After appropriate treatment, , And through the regulation of welding speed or arc current control, penetration state has been controlled. The results show that, even with the obvious fluctuation of the clearance, a weld with reliable penetration and uniform melt width on the back is obtained, so that the closed-loop control of the penetration state of the composite butt weld is achieved.