B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
113/69
B21D 22/26 (2006.01) B21D 22/10 (2006.01)
Patent
CA 1296581
METHOD AND DEVICE FOR PRESS-FORMING SHEET METAL ABSTRACT OF THE DISCLOSURE A method for press-forming sheets having a substan- tially constant thickness on a double action press, com- prising disposing the sheet to be formed on a support (4), applying a first outer slide, or blank holder (1), on the peripheral portion of the sheet (7), then applying a second central slide (2) on the central portion of the sheet, said method further comprising forming the peripheral portion of the sheet by allowing it to slide under the blank holder, by means of at least one active part (11) of the outer sli- de so as to compensate, in certain regions of the finished part, for the excess areas, with unchanged thickness of the initial sheet, relative to the volume to be formed, and simultaneously displacing the central slide (2) so as to shape the angular volumes of the central portion of the sheet by application of the sheet against the surfaces of the central part of the support (4). The invention also provides a press-forming device. Application in the forming of metal sheets, and in particular thin steel sheets of large size. Fig. 7.
481656
Fetherstonhaugh & Co.
Union Siderurgique Du Nord Et de L'est de La France "usinor"
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