Metal deforming – By use of tool acting during relative rotation between tool... – During rotation of work
Patent
1975-10-22
1977-04-19
Larson, Lowell A.
Metal deforming
By use of tool acting during relative rotation between tool...
During rotation of work
72110, B21D 1904
Patent
active
040180727
ABSTRACT:
The present invention relates to machines for recorrugating the ends of a helically corrugated pipe. One end of the pipe is inserted between and engaged by a juxtaposed pair of recorrugating rollers. The rollers are mounted on shafts which are driven to recorrugate the end of the pipe. As an improvement in such machines, the present invention provides a rotatable annular thrust ring, the marginal portion of which passes between the shafts. At least a portion of the end of the pipe to be recorrugated is abutted against the thrust ring to prevent axial movement of the pipe as it is being recorrugated. The ring is allowed to rotate during the recorrugating process to minimize damage to the end of the pipe.
REFERENCES:
patent: 1205605 (1916-11-01), Eligh
patent: 1463073 (1923-07-01), Felten
patent: 1604346 (1926-10-01), Grotnes
patent: 2809687 (1957-10-01), Ogle
patent: 3548623 (1970-12-01), Hess et al.
patent: 3662579 (1972-05-01), Lewis
Larson Lowell A.
Pacific Roller Die Co., Inc.
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