Electric resistance welding pipe machine
The electric resistance welding pipe machine is 3 to 5 times more efficient than conventional TIG welding. Afterwards, the TIG welding bottom sealing MIG welding filling and covering process was changed due to defects such as root incomplete penetration and cratering. The improved welding process basically solved the problem of insufficient penetration of the root, but reduced the welding efficiency. Increased investment in equipment and complicates operating procedures. Recently, the hot pot TIG automatic pipe welding machine was introduced from abroad. The principle of hot wire TIG welding is to supply the filler wire from a separate constant voltage AC source before it is fed into the weld pool. The resistance is heated to a high temperature of 650-800 °C, which greatly accelerates the melting speed of the wire, and its deposition rate is close to the MTG welding deposition rate of the same diameter. In addition, the good back sealing characteristics of the TIG method ensu...