Controlling of VP PMIG welding arc energy

In this paper an AC pulsed MIG welding system base on DSP is developed for welding thin sheets of aluminum alloy,and the process features such as shape of arc,wire melting rate,bead size are investigated.Advantages such as increasing melt speed of wire,decreasing heat input,shallowing penetration are obtained at high EN ratio.These features successfully solve the burn through problem in welding thin plate.Thin plate can be welded at high speed.