The total number of physical quantities selected to ensure welding quality during welding、 such as welding current、 arc voltage、 welding speed、 line energy、 etc.、 is called the welding process parameters. The influence of process parameters on the shape of the weld seam is as follows: (1) When other conditions remain unchanged、 increasing the welding current increases the thickness and reinforcement of the weld seam、 while the width of the weld seam remains almost unchanged (or slightly increases). (2) When other conditions remain unchanged、 the arc voltage increases and the weld width significantly increases、 while the weld thickness and reinforcement slightly decrease. (3) When other conditions remain unchanged、 the welding speed increases and the weld width、 weld thickness、 and reinforcement all decrease P>
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