Mill for roll forming a fluted tube

Details Mill for roll forming a fluted tube Mill for roll forming a fluted tube

B - Operations, Transporting

21

C

80/12

B21C 37/08 (2006.01) B21C 37/083 (2006.01) B21D 5/12 (2006.01)

Patent

CA 1258783

Abstract of the Disclosure A tubing mill for roll forming a strip of metal into a fluted tube having alternating longitudinally extending high and low portions on its outside surface. The mill includes feed means for supplying a generally planar strip of metal and embossing means for forming the high and low portions on the surface of the strip to be formed into the outside surface of the tube. The mill also includes breakdown means for sequentially transversely bending the strip from its planar condition. The breakdown means includes roller means having a gripping surface for engaging the strip and having alternating high and low portions shaped to mate with those of the strip. Additionally, the mill includes closure means for bringing into abutment the lateral ends of the bent portions of the strip, and welding means for seam welding the ends together.

482817

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