COPPER STRAP FOR WELDING DEFORMED BAR STEEL AND SEMIAUTOMATIC ENCLOSED WELDING METHOD

摘要

PURPOSE:To prevent the occurrence of weld defects such as a blowhole and incomplete fusion by using an upper copper strap provided with a groove for supplying gas and a bead formation auxiliary groove on the inside and having a welding port and a lower copper strap having a bead formation auxiliary groove on the inside. CONSTITUTION:The title copper strap is formed of a couple of copper straps of the upper copper strap 3 and the lower copper strap 2 having a semicylindrical shape respectively. The upper copper strap 3 is provided with the groove 11 for supplying gas and the bead formation auxiliary groove 12 on its inside and has the welding port 13. The lower copper strap 2 is provided with the bead formation auxiliary groove 12' on its inside. At the time of welding work, since the groove for supplying gas to shield a groove part is not a hole, it is not blocked up with spatters and weld metal and an accident such as stoppage of the supply of the shielding gas hardly takes place. In addition, removing work of attached matters such as the spatters is also easily carried out. Accordingly, the shielding of a weld zone is always perfectly maintained and the occurrence of the blowhole can be prevented.