Metal deforming – By application of fluent medium – or energy field – With actuated tool engaging work
Patent
1987-10-28
1989-05-30
Jones, David
Metal deforming
By application of fluent medium, or energy field
With actuated tool engaging work
72350, B21D 2210
Patent
active
048339032
ABSTRACT:
A sheet of metal of given thickness is press-formed to provide a part having a substantially constant thickness on a double action press. The sheet to be formed is disposed on a support. A first outer slide, or blank holder is applied on the peripheral portion of the sheet. A second central slide is applied on the central portion of the sheet. The peripheral portion of the sheet is formed while allowing it to slide under the blank holder, by displacing relative to said support at least one active part of the outer slide so as to compensate, in certain regions of the finished part, for excess areas of the sheet, for the given thickness of said sheet, relative to the volume of metal to be formed, and displacing simultaneously with the displacement of the part the central slide so as to shape angular volumes of the central portion of the sheet by application of the sheet against the surfaces of the central part of the support.
REFERENCES:
patent: 2344743 (1944-03-01), Smith, Jr.
patent: 2783728 (1957-01-01), Hoffmann
patent: 3075485 (1963-01-01), Mitchell
patent: 3769824 (1973-10-01), Granzon
patent: 3914969 (1975-10-01), Banks
patent: 4689979 (1987-09-01), Otsuka et al.
Jones David
Union Siderurgique du Nord et de L'est de la France (USINOR)
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