Hybrid forming method and corresponding forming device
AssigneeAdm28 S.àR.L
InventorsGilles Avrillaud, Fabrice Beguet
Life of this patent
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Abstract
A hybrid method for forming a material blank includes placing a material blank to be deformed between a die and a blank-holder. The material blank is deformed by stamping using at least one punch in order to obtain a pre-stamped material blank. A cavity, wherein, on one hand, the at least one punch having pre-stamped the material blank and, on the other, at least one pair of electrodes are located, is filled with liquid. The pre-stamped material blank is placed in contact with the liquid of the cavity, and at least one electrical discharge is generated between the at least one pair of electrodes in such a way as to deform the pre-stamped material blank against the die.
Claims12
A method for forming a material blank, comprising:
- placing the material blank to be deformed between a die and a blank-holder, wherein a face of the die facing the blank-holder is intended to give a final shape to the material blank;
- deforming the material blank by stamping using at least one punch that exerts a force pushing the material blank toward the die, in order to obtain a pre-stamped material blank;
- filling a cavity with a liquid, the cavity at least partially defined by the at least one punch, at least one pair of electrodes being located in the cavity and the pre-stamped material blank being in contact with the liquid in the cavity;
- and
- deforming the pre-stamped material blank against the die by generating at least one electrical discharge between the at least one pair of electrodes.
A hybrid forming device of a material blank, comprising:
- a die cooperating with a blank-holder, the die being movable relative to the blank-holder between an open position in which the material blank can be positioned between the die and the blank-holder and can be removed therefrom and a closed position in which the blank-holder cooperates with the die to hold in a controlled manner an edge of the material blank to be deformed, wherein a face of the die facing the blank-holder is intended to give a final shape to the material blank;
- a tank at least partially defining a cavity capable of being filled with a liquid;
- and
- at least two electrodes in the cavity,
- wherein the tank includes at least one movable punch relative to an assembly formed by the blank-holder and the die in the closed position between a far position in which a free end of the punch is at a distance from the die and a near position in which the free end of the punch is at a distance from the die less than the distance thereof in the far position,
- wherein the punch is able to push the material blank toward the die.
Dependencies are inferred from the claim text.