When the wire being stopping, the welding power outputs high level voltage with wire burning back and forming a liquid weld metal drop.
开始送丝后，焊接电源输出低电平，熔滴依靠送丝动量向熔池过渡。
The forces acted on melting pool during plasma arc welding process are analyzed. The violent movement of liquid metal is as the result of joint forces acted on the pool.
通过对等离子弧焊接时熔池的受力情况分析，阐明了液体金属剧烈运动是由于多种力共同作用的结果。
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