Metal deforming – By use of non-deforming work-gripping clamp and relatively... – By individually non-deforming clamps
Patent
1979-12-26
1982-03-02
Crane, Daniel C.
Metal deforming
By use of non-deforming work-gripping clamp and relatively...
By individually non-deforming clamps
72 11, 72 23, 72371, B21D 1114
Patent
active
043173535
ABSTRACT:
An automated apparatus for forming helical corrugations in a cylindrical tube and comprising a tail stock movable in alternate forward and reverse directions, a head stock disposed in spaced relation with respect to the tail stock whereby the tube may be supported therebetween in a manner for rotating one end of the tube about its own longitudinal axis while holding the opposite end against rotation for twisting the wall of the tube to form the corrugations, a sensor device for detecting the progression of the corrugations along the length of the tube whereby forward movement of the tail stock and forward rotation of the head stock is stopped in accordance with a predetermined position in the twisting operation and the tail stock and head stock are actuated in reverse directions for a controlled unwinding and stretching of the twisted tube, a first sensor device responsive to the reverse movement of the tail stock for releasing the engagement of the twisted tube for permitting removal of the tube from the apparatus, a second sensor device responsive to the continued reverse movement of the tail stock for stopping the operation of the apparatus in preparation for a next succeeding tube twisting operation, and an automated apparatus for inserting a mandrel through the tube prior to the twisting operation for control of the inner diameter of the corrugations.
REFERENCES:
patent: Re24783 (1960-02-01), Humphrey
patent: 3015355 (1962-01-01), Humphrey
patent: 3533267 (1970-10-01), Bunnell
patent: 4059004 (1977-11-01), Perkins
Geppelt Elmo W.
Poore William H.
Crane Daniel C.
Delta t Limited
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