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US 11,213,918 B2Granted
Arc welding
AssigneeAcergy France SAS
InventorKouassi Gnamien Cesar-Auguste Atin
Life of this patent
Estimating the term…
Abstract
A weld is formed in a workpiece such as a pipeline by first activating a melting device, such as a laser, to form a molten weld pool in the workpiece and then activating a welding device, such as a GMAW torch, to initiate a weld in the weld pool. The weld therefore incorporates the weld pool homogeneously. Relative movement between the activated welding device and the workpiece continues and completes the weld while the melting device remains deactivated.
Claims32
A method of welding a workpiece comprises:
- activating a melting device;
- forming a molten weld pool in the workpiece using the activated melting device;
- activating a welding device to initiate a weld in the weld pool;
- deactivating the melting device;
- effecting relative movement between the activated welding device and the workpiece to continue the initiated weld while the melting device is deactivated;
- and
- protecting the deactivated melting device from radiated heat emitted by the activated welding device by moving a barrier into a blocking position between the deactivated melting device and the activated welding device;
- wherein the welding device and the melting device are in fixed relation during said relative movement between the activated welding device and the workpiece.
5 more elements
A welding apparatus comprises:
- a melting device for forming a weld pool at a weld initiation point;
- a welding device for forming a weld to be initiated at the weld pool;
- a controller that is programmed to deactivate the melting device and to activate the welding device to complete the weld with the melting device remaining deactivated;
- and
- a barrier that is movable, on deactivation of the melting device, into a blocking position between the deactivated melting device and the activated welding device;
- wherein the welding device and the melting device are mounted together on a common supporting structure for movement relative to a workpiece.
3 more elements
Dependencies are inferred from the claim text.