Metal deforming – By tool-couple pressing together adjacent surface portions... – To form helically-seamed tube
Patent
1986-10-24
1987-12-08
Larson, Lowell A.
Metal deforming
By tool-couple pressing together adjacent surface portions...
To form helically-seamed tube
72 70, 72 84, 72105, B21D 1904
Patent
active
047111100
ABSTRACT:
An apparatus for crimping the leading edge of continuously produced spiral pipes is disclosed. The apparatus includes upper and lower passive crimping rollers, which are rotatably mounted adjacent each other in a holder. The holder is carried by a guide rail system which slides in the axial direction of the spirally moving pipe. The holder and rollers are rotated between a down position, where the continuously produced pipe will move freely over the crimping apparatus, and an up position where the leading edge of the pipe will pass between the upper and lower crimping rollers. When the crimping apparatus is in the up position and the leading edge of the pipe is between the crimping rollers, the lower roller is raised until the rollers cooperate to crimp the leading edge of the pipe. The spirally moving pipe will exert a force on these rollers, which causes the guide means, which carries the rollers, to move axially with the pipe. The crimping rollers will crimp the entire circumference of the pipe's leading edge as the crimping rollers move axially with the pipe and the leading edge of the pipe rotates between the rollers. When the entire leading edge of the pipe has been crimped, the holder and rollers are rotated to their down position, so that the pipe production can resume without obstruction by the crimping apparatus.
REFERENCES:
patent: 3132616 (1964-05-01), Hale
patent: 3662579 (1972-05-01), Lewis
patent: 3940962 (1976-03-01), Davis
patent: 4018072 (1977-04-01), Davis
patent: 4041747 (1977-08-01), Elkin
patent: 4567742 (1986-02-01), Castricum
The Spiro Edgeformer 1231 S Brochure (undated).
Larson Lowell A.
Spiro America Inc.
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