B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
327/1.3
B23K 26/00 (2006.01) B23K 13/02 (2006.01) B23K 13/04 (2006.01) B23K 26/03 (2006.01) B23K 26/26 (2006.01) B23K 26/42 (2006.01) B23K 28/02 (2006.01)
Patent
CA 1245298
ABSTRACT OF THE DISCLOSURE A high-frequency electric resistance welding method combined with the irradiation of a laser beam in which a workpiece is continuously fed and opposed edges of the workpiece are formed into a wedge shape by causing them to converge as they are butted against each other, and the butted edges are melted by heating them with high-frequency resistance heating and a laser beam, to weld the butted edges. The laser beam is projected against the range of over 30% and below 80% of the thickness of the butted edges including the central portion of the thickness to melt the butted edges by the combined heating action of the laser beam and high-frequency current. The corners are heated and melted by means of high- frequency electric resistance heating, so that the butted edges of the workpiece can be melted uniformly through the entire range of thickness.
499039
Haga Hiroyo
Minamida Katsuhiro
Mizuhashi Nobuo
Takafuji Hideo
Gowling Lafleur Henderson Llp
Nippon Steel Corporation
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