Title:
METHOD OF MOLDING GROOVED PIPE AND ROLLING MILL FOR MOLDING SAID PIPE
Document Type and Number:
Japanese Patent JPS60261619
Kind Code:
A
Abstract:
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 (24) for supplying a generally planar strip of metal (26) and embossing means (28) 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 (32) for sequentially transversely bending the strip from its planar condition. The breakdown means includes roller means (44, 46, 48) 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 (34) for bringing into abutment the lateral ends of the bent portions of the strip, and welding means (36) for seam welding the ends together.
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Inventors:
SEODOORU HAAZERU KURENJIERU
Application Number:
JP11867485A
Publication Date:
December 24, 1985
Filing Date:
May 31, 1985
Export Citation:
Assignee:
ALLIED TUBE & CONDUIT CORP
International Classes:
B21C37/08; B21C37/083; B21C37/15; B21D5/12; (IPC1-7): B21C37/083; B21C37/15
Attorney, Agent or Firm:
Kyozo Yuasa