H - Electricity – 05 – B
Patent
H - Electricity
05
B
327/17
H05B 6/02 (2006.01) B23K 13/02 (2006.01) H05B 6/36 (2006.01)
Patent
CA 1149884
ABSTRACT OF THE DISCLOSURE An apparatus for continuous manufacture of butt- welded pipes is constituted by a heating furnace for heating a skelp continuously passed therethrough up to a predetermined temperature less than the butt-welding temperature for the material of the skelp, heaters adjacent the outlet end of the heating furnace and having spaced opposed induction heating coils on opposite sides of the path along which the skelp is passed through said heaters and adjacent the edge portions of the skelp for heating only the edge portions of the skelp discharged from the heating furnace up to the butt-welding temperature. The induction heating coils are such that the electromagnetic coupling between the induction heating coils and the corresponding edge portions of the skelp can be varied to adjust the temperature to which the edge portions are heated. A bending device adjacent the outlet end of the heat- ers bends the skelp into a generally tubular form, and butt- welding rolls adjacent the outlet end of the bending apparatus apply a predetermined pressure to the bent up skelp for butt- welding the edges of the skelp to each other. A cooling device along the path of the pie between pairs of contracting rolls cools the seamed portion of the pipe to the temperature of the remainder of the pipe.
360905
Higuchi Kenji
Machida Nobuo
Nishimoto Koji
Oki Toshiyuki
Sumitomo Kinzoku Kogyo Kabushiki Gaisha
Swabey Ogilvy Renault
LandOfFree
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