Apparatus for locking a sheet of metal suitable to be shaped in a press
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United States of America Patent
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Aug 28, 2007
Grant Date -
Nov 23, 2006
app pub date -
May 1, 2006
filing date -
May 17, 2005
priority date (Note) -
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Abstract
An apparatus for locking a sheet of metal to be shaped in a press, comprising at least one fluid-operated actuator for translational motion of a first sheet presser, adapted to support, in an initial operation step a sheet of metal to be shaped, arranged above a first lower die part, coupled to the base of the press. The first presser cooperates with a second presser, coupled to the second die part associated with the upper ram of the press, in locking a perimetric portion of the sheet of metal during shaping. The actuators are part of a circuit for regenerating and supplying the working fluid, provided with devices for the delayed return of the actuators, upon opening the press, for shaped sheet protection.
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