Method and device for drawing containers of frustoconical shape

Details Method and device for drawing containers of frustoconical shape Method and device for drawing containers of frustoconical shape

1992-06-05

1993-02-23

Larson, Lowell A.

Metal deforming

With cutting

By composite tool

72348, B21D 2226

Patent

active

051879662

ABSTRACT:
The device comprises a punch (2) of frustoconical shape and a die (1). The die comprises concentric rings (8, 9, 10) movable in the direction of the displacement of the punch, and pressure means (14, 15, 16) for exerting on the rings a predetermined force in the direction toward the punch, each of the annular front surfaces (20, 21, 13) of the rings having a shape which is complementary to the annular surface (20', 21', 13') of the punch in axially facing relation thereto. According to the method of the invention for in particular manufacturing in a single stroke a container of generally frustoconical shape, concentric annular zones (32, 33, 34) of the blank are deformed in succession by commencing with that having the smallest size, each annular zone (32, 33, 34) being maintained pressed toward the punch by a corresponding ring (respectively 10, 9, 8) from the moment when the zone is in contact with the punch until the end of the drawing operation, each annular zone being moreover in bearing relation to a corresponding ring so long as the inner adjacent zone is not applied against the punch.

REFERENCES:
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patent: 1551832 (1925-09-01), Miller et al.
patent: 2312749 (1943-03-01), Bullock
patent: 2968270 (1961-01-01), McChesney
patent: 3000274 (1961-09-01), Duskey et al.
patent: 3252315 (1966-05-01), Muench
patent: 3302441 (1967-02-01), Bozek
patent: 3372569 (1968-03-01), Bozek
patent: 3443412 (1969-05-01), Webb
patent: 3580041 (1971-05-01), Tilly et al.

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