Patent ID: 11926003
Assignee: PIPELINE SUPPLY & SERVICE, LLC
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A method of welding a tubular workpiece, comprising:
suspending a helper station from a lifting arm adjacent to the tubular workpiece with a supply of consumable welding wire carried thereon;
positioning a guide track about the tubular workpiece along at least a portion of the circumference of the tubular workpiece and securing a mechanized carrier to the guide track, with a gasless torch held by the mechanized carrier positioned adjacent to a weld path on the tubular workpiece to be welded;
feeding the consumable welding wire to the gasless torch and supplying a controlled voltage from a welding machine to generate an electrical arc between the consumable welding wire and the tubular workpiece, while moving the mechanized carrier along the guide track to weld along the weld path
supplying the controlled voltage from the welding machine to the gasless torch using a coaxial voltage cable;
sensing an arc voltage at the tubular workpiece;
communicating a magnitude of the sensed voltage to the welding machine; and
dynamically adjusting the controlled voltage supplied by the welding machine to the torch in response to the arc voltage sensed by the voltage sensor.