Drawing machine

Details Drawing machine Drawing machine

1989-12-22

1991-03-05

Larson, Lowell A.

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

72397, 72403, B21D 2400

Patent

active

049968645

ABSTRACT:
A drawing machine for drawing a workpiece (41) comprises first and second drawing dies (42, 43), first and second push rods (45, 46, 47, 48) and first and second junction rods (53, 54). When the first push rods (45, 46) are downwardly moved, the first junction rod (53) is pressed and moved by the first push rod (45) to press the first drawing die (42). Consequently, the first drawing die (42) forms a first-stage drawn part in the workpiece (41). When the second push rods (47, 48) are downwardly moved, the second junction rod (54) is pressed and moved by the second push rod (48), to press the second drawing die (43). Consequently, the second drawing die (43) forms a second-stage drawn part in the workpiece (42). Thus, a plurality of stages of drawn parts can be formed by the same machine. A large number of holes (51, 52) may be provided in a junction die (55) for receiving junction rods (53 ), to insert the junction rods (53) in only prescribed ones of the holes. When the second drawing die (43) is changed in configuration or size, the positions of the junction rods (53) are also changed in response. Thus, jigs and tools can be efficiently exchanged in a short time in order to upper die with different patterns of drawing.

REFERENCES:
patent: 1431175 (1922-10-01), Ogden et al.
patent: 2318819 (1943-05-01), Verson
patent: 2751871 (1956-06-01), Higgins et al.
patent: 4036056 (1977-07-01), Saunders

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