| 摘要 |
PURPOSE:To obtain the bead of high quality at the seam terminal by selecting adequately the welding current, welding voltage and welding speed at the seam terminal welding time. CONSTITUTION:The stationary part is welded under steady welding conditions, for instance, of the current I0: 500A, voltage: V 25V, speed S0: 4m/min in the seam welding of UOE steel pipe. When approaching to the terminal part it is transferred to the terminal welding conditions of causing no arc blow of, for instance, current I1: 170A, voltage V1: 17V and speed S1: 1 m/min at the time T of for instance 1-1.5 sec by an integrating circuit. In case of performing the high speed welding of MIG, MAG, TIG, etc. this method can be applied for every field which needs the control of bend shapes.
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