B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
327/1.3
B23K 26/14 (2006.01) B23K 26/02 (2006.01) B23K 26/18 (2006.01) B23K 26/24 (2006.01)
Patent
CA 1224534
A B S T R A C T Contiguous metal plates are welded together without special edge preparation or beveling e.g. of cut edges from one side using a focused high intensity laser beam . To ensure maintenance of welding conditions even when the plate edges are spaced apart by cutting imperfections or the like a wire is fed to, or near, the beam focus to intercept the beam and give rise to a plasma. This plasma is kept in place by gas supply means , the gas supply through dueling of which (a) prevents plasma building up above the weld zone (which would decrease the beam intensity at the weld) but (b) holds some plasma in the region of the beam impingement on the wire so as to allow energy transfer to the adjacent walls. Butt welds or T welds can be made in this way, even in plate material, in a single pass from one side. The technique thus permits the arrangement of work stations on a production line to be simplified and rationalized when making up multiweld repeat structural units e.g. in shipbuilding.
452512
British Shipbuilders
Marks & Clerk
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