Annular corrugator

Details Annular corrugator Annular corrugator

1980-11-03

1982-07-20

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

With tool surface orbiting around axis parallel to direction...

72 98, 72103, B21D 1504, B21D 1704

Patent

active

043399363

ABSTRACT:
Apparatus for producing annular corrugations in the wall of thin metal tubing in the manufacture of corrugated metal hose includes a plurality of dies. Each die comprises a helical rib of greater than 360.degree. extent formed on the inner rim of an annular ring with the ribs on successive dies being progressively thinner and having successively closer pitches so as to progressively deepen the corrugations and make them narrower. The dies are preferably mounted to rotate in synchronization with each other at identical angular speeds, and are arranged in pairs in one or more stages with the dies in each stage engaging opposite sides of the tube.

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patent: 3568489 (1971-03-01), Tobita
patent: 3583189 (1971-06-01), Kelstrom
patent: 3656331 (1972-04-01), Kuypers et al.
patent: 3788113 (1974-01-01), Martin
patent: 4215559 (1980-08-01), Kuypers

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