Balance and offset in adaptive submerged arc welding
AssigneeEsab AB
InventorHannes Raudsepp
Life of this patent
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Abstract
A method includes monitoring a submerged arc welding (SAW) operation in real-time; determining, based on the monitoring and in real-time, a discrepancy between a desired weld parameter and an actual weld parameter of a weld resulting from the SAW operation; and in response to determining the discrepancy, controlling a power supply, which provides power for the SAW operation, to modify at least one of balance or offset of an alternating current (AC) welding power signal supplied for the SAW operation to compensate for the discrepancy.
Claims20
A method comprising:
- scanning a geometry of a joint;
- estimating, based on the scanning, a number of runs to weld the joint using a submerged arc welding (SAW) operation;
- conducting and monitoring the SAW operation;
- determining, based on the monitoring, the geometry of the joint, and the number of runs to weld the joint, a discrepancy between a desired weld parameter and an actual weld parameter of a weld resulting from the SAW operation;
- and
- in response to determining the discrepancy, and during the SAW operation, adaptively controlling a power supply, which provides power for the SAW operation, to modify at least one of balance or offset of an alternating current (AC) welding power signal supplied for the SAW operation to compensate for the discrepancy while maintaining a predetermined heat input for the weld.
A submerged arc welding (SAW) apparatus comprising:
- a wire feeder mechanism to guide at least one welding wire toward a workpiece;
- a flux delivery system to supply flux to the workpiece;
- a power supply to supply an alternating current (AC) welding power signal to the welding wire to create a molten weld pool on the workpiece;
- and
- a controller configured to:
- cause a scanner to scan a geometry of a joint;
- estimate, based on a result of the scan, a number of runs to weld the joint using a submerged arc welding (SAW) operation;
- determine a discrepancy between a desired weld parameter and an actual weld parameter of a weld formed by the SAW apparatus, and
- control the power supply, based on the based on the geometry of the joint and the number of runs to weld the joint, to adaptively modify at least one of balance or offset of the AC welding power signal to compensate for the discrepancy while maintaining a predetermined heat input for the weld.
One or more non-transitory computer readable storage media encoded with software comprising computer executable instructions and, when the software is executed, operable to:
- cause a scanner to scan a geometry of a joint;
- estimate, based on the geometry of the joint, a number of runs to weld the joint using a submerged arc welding (SAW) operation;
- determine a discrepancy between a desired weld parameter and an actual weld parameter of a weld formed by a submerged arc welding (SAW) apparatus, and
- control a welding power supply, based on the geometry of the joint and the number of runs to weld the joint, to adaptively modify at least one of balance or offset of an AC welding power signal generated by the welding power supply to compensate for the discrepancy while maintaining a predetermined heat input for the weld.
Dependencies are inferred from the claim text.