VP PMIG焊接电弧能量控制

Controlling of VP PMIG welding arc energy

研制了基于DSP控制的逆变式交流脉冲MIG焊接系统,并用于薄板铝合金焊接。对电弧形态、焊丝熔化速度、焊缝尺寸的影响规律等进行了实验研究。实验表明,随着EN极性占整个变极性电流周期比率提高,焊丝熔化速度增大,电弧热输入减少,焊缝熔深变浅。这些特征可以用于解决薄板焊接的烧穿问题。

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 inching 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.