B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
B23K 10/02 (2006.01) B23K 1/14 (2006.01) B23K 1/19 (2006.01) C23C 24/08 (2006.01) C23C 26/02 (2006.01)
Patent
CA 2356512
A method for closing and/or joining a connecting joint or joining seam between two pieces of galvanized sheet metal, in which zinc or a zinc alloy whose melting point is similar to that of zinc is heated to melting temperature and is continuously introduced into the connecting joint, with the heating being performed by a plasma jet without reaching the melting temperature of the steel sheet. The use of a plasma jet allows processing zinc or a zinc alloy without producing any disturbing zinc spatter. The zinc can be supplied as a wire, powder or granulate, whereby it is introduced under an inert-gas bell. This method can also be employed for post--galvanizing weld seams, with a second plasma jet welding set following a first one, it being mechanically coupled with the same and performing the galvanizing of the weld seam by the supply of zinc in wire form without melting the steel sheet anew. Tin foils are used in a special embodiment which are applied in the joining zone of a flanged edge.
Inocon Technologie Ges.m.b.h.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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