1. The welding machine you mentioned is called manual and argon arc welding machine.

2. Dc and pulse selection are generally for argon arc welding.

3, manual welding, welding rod arc welding) welding is holder electrode form, is what you call "the kind of welding clamp electrode, tie-in corresponding electrode material (number), commonly used in larger than 2 mm thickness of steel, iron, stainless steel, the welding between the workpiece and argon arc welding, compared with simple operation, high efficiency advantages, but the presence of slag particles splash, easy slag and weld, large is not beautiful, etc.

Four argon arc welding, argon arc welding gun and the corresponding material (number) welding wire welding form, it can isolate during welding argon protection such as oxygen in the air the negative effects of butt welding area, and arc burning stability, heat concentration, no splash, dense weld, forming beautiful, deformation, cracks tend to be small, in addition to steel, iron, stainless steel, it can also welding, such as magnesium, titanium, aluminum etc more active metal and alloy;However, it should be equipped with argon gas (usually high-pressure gas bottle) and argon gas vacuum reducing device. The thickness of the workpiece is not as large as that of manual welding, and it is generally suitable for 0.8-10mm thickness, and the welding technology is more difficult to master than manual welding.

5. Pulse argon arc welding is easy to control the heat input of welding temperature, which can not only penetrate but also not easily penetrate. It is especially suitable for the welding of thin wall (0.5-3mm) workpiece, and easy to form beautiful fish-scale welding seam.

6. Argon arc welding is widely used in stainless steel welding.

7. Argon arc welding is also used for bottom welding of thick wall workpiece. That is to say, after the groove of workpiece is right, the bottom is welded by argon arc welding first, and then the top is welded by manual welding (cover surface).