Metal deforming – With tool carrier
Patent
1989-02-28
1990-05-08
Jones, David
Metal deforming
With tool carrier
100214, 100231, 83859, B21D 3700
Patent
active
049227440
ABSTRACT:
The punch machine comprises a U-shaped member having an upper leg, a lower leg and a crosspiece to thereby form a U-shaped work space open on the front side of the punch machine but closed on the rear side by the crosspiece between the upper leg and the lower leg, a punch piston-cylinder unit with a punch tool mounted in the upper leg and a die-bearing member and/or a workpiece receiving member mounted in the lower leg. At least the upper leg experiences a bending moment and a resultant elastic deformation caused by the punching force occurring during the punching operation. To reduce the deformation, a tie bar connects both the lower and the upper legs located horizontally between the crosspiece and the punch piston-cylinder unit. This tie bar passes through or by the work space. It may be moved horizontally according to the punching force to reduce the elastic deformation. Also a process is described for operating the punch machine which keeps the bending moment constant.
REFERENCES:
patent: 2602508 (1952-07-01), Patrick
patent: 3561252 (1971-02-01), Norton et al.
patent: 3662640 (1972-05-01), Wrona
patent: 3884142 (1975-05-01), Jonsson
patent: 4018150 (1977-04-01), Shiokawa
patent: 4033216 (1976-09-01), Brolund et al.
patent: 4389869 (1983-06-01), Van Cleave
patent: 4434646 (1984-03-01), Maeda et al.
Dubno Herbert
Jones David
Peddinghaus Carl Ullrich
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