Metal deforming – With use of control means energized in response to activator... – Metal deforming by use of roller or roller-like tool element
Patent
1989-05-02
1990-10-16
Jones, David
Metal deforming
With use of control means energized in response to activator...
Metal deforming by use of roller or roller-like tool element
72 10, 72 19, 72 21, 72389, 72448, 72473, B21D 502
Patent
active
049626540
ABSTRACT:
A method of bending sheet metal pieces by means of a bending apparatus having a bending bar and a bottom die with adjustable die bottom. In a first step, the practical bending behavior of a sample sheet metal piece having a certain thickness and a certain material quality is determined and stored as a reference curve trace. In a second step, when bending further sheet metal pieces with the same thickness and having equal material quality, the effective bending behavior of each sheet metal piece is determined and compared with the stored reference curve trace. Then, the position of the adjustable die bottom is corrected on the basis of the calculated difference.
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patent: 4802357 (1989-02-01), Jones
patent: 4819467 (1989-04-01), Graf et al.
Haemmerle AG
Jones David
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