Apparatus for forming an annular member

Details Apparatus for forming an annular member Apparatus for forming an annular member

1996-08-30

2000-06-06

Bryant, David P.

Metal deforming

With use of control means energized in response to activator...

Metal deforming by use of roller or roller-like tool element

72105, 72110, 2940709, 29898066, B21B 3700, B21D 1504

Patent

active

060704438

ABSTRACT:
In an annular member forming apparatus including: a forming roll rotatable in contact with an outer cylindrical surface of an annular workpiece; a mandrel relatively movable towards and away from the forming roll in contact with an inner cylindrical surface of the workpiece; and an outside diameter detecting device for detecting an outside diameter of the workpiece which is to be worked, the apparatus further includes a moving device for moving relatively the forming roll and the mandrel and for pressing the workpiece by the forming roll and the mandrel moved towards each other to subject the workpiece to rough rolling and to finish rolling. The moving device includes a retracting device for correcting an elastic deformation of the forming roll, the mandrel and the moving is device occurring during the rough rolling, for a switching time from the rough rolling to the finish rolling by an output signal from the outside diameter detecting device. The moving device is moved backwardly away from the mandrel by a distance corresponding to a difference between amounts of elongation which are due to a rolling load during the rough rolling and due to a rolling load during the finish rolling for the switching time.

REFERENCES:
patent: 1976927 (1934-10-01), Eckert
patent: 3709011 (1973-01-01), Wieting et al.
patent: 3839887 (1974-10-01), Vieregge
patent: 3859830 (1975-01-01), Jeuken et al.
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patent: 4326397 (1982-04-01), Strugala et al.
patent: 4454739 (1984-06-01), Ciccorelli
patent: 4823580 (1989-04-01), Kadotani
patent: 4823581 (1989-04-01), Kadotani
patent: 4869088 (1989-09-01), Kadotani
patent: 5605068 (1997-02-01), Yamasoto et al.

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