Stopping an electroslag welding process
AssigneeEsab AB
InventorsHannes Hugo Raudsepp, Ulf Nicklas Andrén
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Abstract
Stopping electroslag strip cladding operations feeding multiple strips includes detecting, during a welding phase of an electroslag welding operation feeding a first strip and a second strip towards a molten slag pool formed on a work piece, initiation of a stop phase. Upon detection the feeding of the first strip towards the molten slag pool is stopped. Additionally, a feed direction of the feeding of the second strip is reversed to retract the second strip away from the molten slag pool.
Claims20
A method for stopping electroslag welding, comprising:
- detecting, during a welding phase of an electroslag welding operation feeding a first strip and a second strip towards a molten slag pool formed on a work piece, initiation of a stop phase;
- stopping the feeding of the first strip towards the molten slag pool;
- and
- reversing a feed direction of the feeding of the second strip to retract the second strip away from the molten slag pool.
An apparatus comprising:
- a first strip feeder to guide a first strip towards a work piece;
- a second strip feeder to guide a second strip towards the work piece;
- a power source to transfer a current to at least one of the first strip and the second strip to create a molten slag pool on the work piece sufficient for initiation of a cladding phase;
- and
- a controller to:
- detect, during the cladding phase, initiation of a stop phase;
- stop the first strip feeder from feeding of the first strip towards the molten slag pool;
- and
- cause the second strip feeder to reverse a feed direction of the second strip to retract the second strip away from the molten slag pool.
One or more non-transitory computer readable storage media encoded with software comprising computer executable instructions and when the software is executed operable to:
- detect, during a welding phase of an electroslag welding operation feeding a first strip and a second strip towards a molten slag pool formed on a work piece, initiation of a stop phase;
- cause a first feeder to stop feeding the first strip towards the molten slag pool;
- and
- cause a second strip feeder to reverse a feed direction of the second strip to retract the second strip away from the molten slag pool.
Dependencies are inferred from the claim text.