Method for electrohydraulic forming and associated device
AssigneeAdm28 S.àR.L
InventorsGilles AVRILLAUD, Romain MERCIER
Life of this patent
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Abstract
A method for electrohydraulic forming a material blank includes: a material blank to be shaped is placed between a mould and a blank holder; a tight cavity containing electrodes is filled with liquid up to a predetermined liquid level; the material blank is brought into contact with the liquid of the cavity; the material blank is hydraulically preformed; and the material blank is electrohydraulically formed. The liquid of the cavity is pressurised for the hydraulic preforming by moving all or part of one of the walls of the cavity.
Claims15
A method, comprising:
- placing a blank of material between a mould and a blank holder,
- filling a sealed cavity containing electrodes with liquid to a predetermined liquid level,
- placing the blank of material in contact with the liquid in the cavity,
- hydraulically preforming the blank of material, the hydraulically preforming including pushing the blank of material towards the mould by the liquid in the cavity, the blank of material thereby undergoing a first deformation, and
- electrohydraulically forming the blank of material, the electrohydraulically forming including pressing the blank of material against the mould by at least one pressure wave generated by an electric discharge between the electrodes, the blank of material thereby undergoing a second deformation,
- wherein the hydraulic preforming includes pressurizing the liquid in the cavity by displacing all or part of a wall of the cavity.
An electrohydraulic forming device for electrohydraulically forming a blank of material comprising:
- a frame,
- a mould,
- a blank holder configured to hold the blank of material against the mould and cause the blank of material to form at least part of one wall of a sealed cavity configured to be filled with a liquid,
- plural electrodes placed inside the cavity, wherein:
- the cavity comprises at least one movable wall, and
- the movement of the movable wall is capable of pressurising the liquid in the cavity to a sufficient degree to generate a deformation of the blank of material against the mould.
Dependencies are inferred from the claim text.