An electrohydraulic forming device for forming a blank of material includes: —an electrohydraulic forming chamber, —at least one central electrode extending in a so-called longitudinal direction and comprising a first end arranged inside the electrohydraulic forming chamber, —a body provided with a bore for introducing each central electrode into the electrohydraulic forming chamber, the electrohydraulic forming chamber being partially formed by said body, —a mould, and —at least one peripheral electrode electrically insulated from each central electrode, arranged at a distance from and around the end of a central electrode, and extending in a transverse plane relative to said central electrode.

An electrohydraulic forming device for forming a blank of material includes: —an electrohydraulic forming chamber, —at least one central electrode extending in a so-called longitudinal direction and comprising a first end arranged inside the electrohydraulic forming chamber, —a body provided with a bore for introducing each central electrode into the electrohydraulic forming chamber, the electrohydraulic forming chamber being partially formed by said body, —a mould, and —at least one peripheral electrode electrically insulated from each central electrode, arranged at a distance from and around the end of a central electrode, and extending in a transverse plane relative to said central electrode.

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.

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.

The present invention concerns a device for pulsed electric discharge in a liquid comprising a control module configured to control a voltage generator such that the voltage generator applies a predetermined heating voltage setpoint between electrodes during a heating period until a pulsed electric discharge is obtained between the electrodes, in order to measure the breakdown voltage during the pulsed electric discharge, in order to estimate the quantity of energy supplied to the liquid during the heating period, referred to as the “quantity of heating energy”, from the predetermined heating voltage setpoint and the measured breakdown voltage, and in order to determine a new heating voltage setpoint to apply between the electrodes of the at least one pair of electrodes at the next pulsed electric discharge based on the estimated quantity of heating energy and a predefined breakdown voltage setpoint.

The present invention concerns a device for pulsed electric discharge in a liquid comprising a control module configured to control a voltage generator such that the voltage generator applies a predetermined heating voltage setpoint between electrodes during a heating period until a pulsed electric discharge is obtained between the electrodes, in order to measure the breakdown voltage during the pulsed electric discharge, in order to estimate the quantity of energy supplied to the liquid during the heating period, referred to as the “quantity of heating energy”, from the predetermined heating voltage setpoint and the measured breakdown voltage, and in order to determine a new heating voltage setpoint to apply between the electrodes of the at least one pair of electrodes at the next pulsed electric discharge based on the estimated quantity of heating energy and a predefined breakdown voltage setpoint.

The present disclosure discloses a device and a method for forming a metal plate by using a high-energy electric pulse to drive an energetic material. The device includes high-energy pulse discharge equipment, an intelligent robot arm control system, a vacuum pumping device, a hydraulic press, a forming die, positive and negative electrodes, an energetic rod, and liquid supply equipment. According to the present disclosure, energy of a metal wire is added to energy of an energetic material after energy release to implement high-rate forming of the plate. A discharge voltage of the high-energy pulse discharge equipment is reduced and a service life thereof is prolonged. The discharge equipment is triggered by the manufactured small-size electric pulse metal wire, thereby reducing a volume and costs of the equipment and miniaturizing the equipment to implement precise operating, forming, and intelligent integration with the robot arm control system.

The present disclosure discloses a device and a method for forming a metal plate by using a high-energy electric pulse to drive an energetic material. The device includes high-energy pulse discharge equipment, an intelligent robot arm control system, a vacuum pumping device, a hydraulic press, a forming die, positive and negative electrodes, an energetic rod, and liquid supply equipment. According to the present disclosure, energy of a metal wire is added to energy of an energetic material after energy release to implement high-rate forming of the plate. A discharge voltage of the high-energy pulse discharge equipment is reduced and a service life thereof is prolonged. The discharge equipment is triggered by the manufactured small-size electric pulse metal wire, thereby reducing a volume and costs of the equipment and miniaturizing the equipment to implement precise operating, forming, and intelligent integration with the robot arm control system.

A method for electrohydraulically forming a blank of material includes—a blank of material to be deformed is placed between a mould and a blank holder, —a cavity containing electrodes is filled with liquid to a predetermined liquid level, —the blank of material is placed in contact with the liquid in the cavity, —a first electric discharge is generated between at least two electrodes so as to deform the blank of material against the mould, —the mould is brought nearer to the electrodes by moving the mould so as to reduce the distance between the electrodes and the blank of material to be deformed after the first electric discharge has been generated, —at least one other electric discharge is generated between at least two electrodes so as to deform the blank of material against the mould.

A method for electrohydraulically forming a blank of material includes—a blank of material to be deformed is placed between a mould and a blank holder, —a cavity containing electrodes is filled with liquid to a predetermined liquid level, —the blank of material is placed in contact with the liquid in the cavity, —a first electric discharge is generated between at least two electrodes so as to deform the blank of material against the mould, —the mould is brought nearer to the electrodes by moving the mould so as to reduce the distance between the electrodes and the blank of material to be deformed after the first electric discharge has been generated, —at least one other electric discharge is generated between at least two electrodes so as to deform the blank of material against the mould.