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US 4,063,058 AGranted
Apparatus for making seam welded tubing
AssigneeHoesch Werke Aktiengesellschaft
InventorHeinz Gross
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AssigneeHoesch Werke Aktiengesellschaft
InventorHeinz Gross
Estimating the term…
Apparatus for making seam welded tubing of the type comprising a first butt welding machine for joining together by submerged arc welding the adjacent ends of successive lengths of strip to form a continuous strip, a strip storing device for storing the continuous strip and a tube forming and welding machine is provided with a series of roll stands with the roll axes of successive stands offset from each other so that as the strip passes through the stands, it is turned over laterally. A second butt welding machine is then provided after the roll stands and before the strip is fed into the tube forming and welding machine so that the successive lengths of strip are first butt welded together along the joint on one face of the strip and then second welds are made on the other face of the strip so that no further welding is necessary after the tube has been formed and seam welded in the tube forming and welding machine.
In apparatus for manufacturing seam welded tubing from strip, said apparatus being of the type having a first submerged arc butt welding machine for joining together the ends of successive lengths of said strip to form a continuous strip, a strip storing device for storing said continuous strip, a tube forming and welding machine for forming said continuous strip into a tube and welding said tube, and means for feeding said strip through said first butt welding machine, said storing device and then to said forming and welding machine, the improvement comprising a second butt welding machine, and strip turning means between said first butt welding machine and said second butt welding machine, said strip turning means being operative to turn said strip over laterally whereby said second butt welding machine can make butt welds between said ends of said successive lengths of strip on the opposite faces of said lenghts of strip from the welds made by said first butt welding machine.
Dependencies are inferred from the claim text.