What is the general working current of the ordinary electric welding machine

Select the welding current according to the position of the welding method: 140A (elevation weld), 140-160A (vertical butt joints, horizontal butt joints), 180A or more (flat butt joints).

Welding machine from the current specifications to the following general 160, 180, 200, 250, 315, 400, 500, 630, 800, 1000, 1250, 1600, 2000, 2500, 3150

These currents correspond to the type of welding machine is divided into the main types of welding machine, the ZX7 series of manual welding machine, the WS7 series of TIG welding machine, the WSE series of AC and DC square-current welding machine, the WS7 series of TIG welding machine, the WS7 series of TIG welding machine. WSE series AC and DC square wave TIG welding machine, NBC series carbon dioxide semi-automatic gas shielded welding machine, MZ7 series of submerged arc automatic welding machine, etc., as well as TIG small TIG welding machine, LGK series plasma cutting machine.

Extended information

If the all-position welding (including flat, horizontal, vertical, elevation of various positions) selection of the welding current value should be the all-powerful current value, generally take the value of the vertical welding current. And welding horizontal fixed pipe butt joints using all-position welding current, generally take the value of the welding current of the vertical butt joints.

Choose the current value according to the welding level: the general bottoming layer using a smaller current value, filler layer using a larger current value, and cover the surface layer current value is relatively small. For example, welding flat butt, generally open bevel with multi-layer multi-channel welding, bottoming layer using 150A current, while the filler layer can be used 180-200A current value. Covering layer using a reduced current value of 10-15A, to ensure that the molding is beautiful, no biting edge and other welding defects.

Selection of welding current based on production experience: see spatter, welding current, resulting in increased arc force, spatter; welding current when the arc force is small, slag and iron is not easy to separate.

Look at the weld molding: welding current is easy to bite the edge, small residual height; welding current is small, narrow and high weld. Look at the welding rod melting condition: welding current, welding rod melting fast and red, welding current is easy to stick arc.

Reference:

Baidu Encyclopedia-Welding current