| 主权项 |
1. A welding system, said system comprising
a joint created by an alignment of a first workpiece and a second workpiece; a torch; a first power supply that outputs a first welding current, said first power supply providing said first welding current via said torch to a first wire to create a lead arc between said first wire and said joint, said lead arc creating a molten puddle in said joint; a first wire feeder that feeds said first wire to said torch; a second wire feeder that feeds a second wire to a contact tube; a second power supply that outputs a heating current during a first mode of operation and a second welding current during a second mode of operation, said second power supply providing said heating current or said second welding current to said second wire via said contact tube; a travel mechanism that provides a relative movement between said joint and said first wire and said second wire such that said first wire and said second wire move between a first sidewall of said joint and a second sidewall of said joint in a weave pattern; and a controller that initiates said first mode of operation in said second power supply to heat said second wire to a desired temperature and switches said second power supply from said first mode of operation to said second mode of operation to create a trailing arc, said trailing arc created between said second wire and said joint, wherein said trailing arc provides an increased heat input to said molten puddle relative to a heat input provided by said first mode of operation when said first wire and said second wire are at at least one of said first sidewall and said second sidewall. |
