A method for forming a metal plate by using a high-energy electric pulse to drive energetic materials (EMs), applied to a device for forming the metal plate by using the high-energy electric pulse to drive the EMs, the device comprising:
- an upper die;
- a lower die;
- and
- a high energy electric pulse forming system, wherein the upper die comprises an upper die plate, a concave mold, and a die fixing plate, the lower die comprises a lower die plate, a liquid storage chamber, and a liquid chamber fixing plate, the concave mold is fixed on the upper die plate through the die fixing plate, and the concave mold is provided with an exhaust vent connected to an external vacuum pump;
- the liquid storage chamber is fixed on the liquid chamber fixing plate, the liquid chamber fixing plate is fixed on the lower die plate, a cross section of a side wall of the liquid storage chamber is circular, positive and negative electrodes are fixed and assembled on a first location and a second location of the side wall of the liquid storage chamber which are centrosymmetric, respectively;
- the liquid storage chamber is connected to a liquid supply equipment, and an energetic rod is arranged between the positive and negative electrodes, the positive and negative electrodes are connected to the high energy electric pulse forming system;
- and the upper die plate and the lower die plate are fitted and mounted through a guide sleeve and a guide post;
- wherein the method comprises the following steps:
- step 1:
- packing the EMs into an insulation tube, and sealing two ends of the insulation tube through gluing by an end plug to form the energetic rod;
- wherein a diameter of a metal wire in the energetic rod is 0.1-1.0 mm and an effective discharge length is 20-200 mm;
- and the EMs are formed by mixing two or more of aluminum powder, ammonium nitrate, ammonium perchlorate, copper oxide, polytetrafluoroethylene, and nickel powder;
- programming an robot arm to place the energetic rod between the positive and negative electrodes, wherein a pinball device at an electrode terminal of each of the positive and negative electrodes locks the metal wire at two ends of the energetic rod;
- and using the robot arm to clamp a metal plate and place the metal plate in the liquid storage chamber, wherein a first sealing ring is used between the metal plate and the liquid storage chamber for sealing;
- step 2:
- fixing the liquid storage chamber on the liquid chamber fixing plate, and fixing the liquid chamber fixing plate on the lower die plate through a fastening bolt, fitting and mounting the upper die plate and the lower die plate through the guide sleeve and the guide post, and presetting a die clamping force for the upper die and the lower die by using a hydraulic press;
- step 3:
- checking a first connection status between the external vacuum pump and the concave mold, checking a second connection status between a liquid filling interface and the liquid supply equipment, checking a third connection status between the high energy electric pulse forming system and positive electrode of the positive and negative electrodes, and checking a fourth connection status between the high energy electric pulse forming system and negative electrode of the positive and negative electrodes;
- step 4:
- starting the external vacuum pump such that a forming concave mold cavity of the concave mold is in a certain vacuum state;
- step 5:
- opening the liquid supply equipment to fill the liquid storage chamber with liquid through the liquid filling interface;
- step 6:
- checking a fifth connection status of a line, and if the line is “on”, performing electric discharging;
- step 7:
- closing a charging switch such that a high-voltage charging power source charges a discharge capacitor bank through a high-voltage rectifier and a current limiting resistor, and after a preset voltage is reached, opening the charging switch, and opening a discharge trigger signal source to control an auxiliary discharge gap to discharge the energetic rod;
- step 8:
- after the discharge is completed, opening a drain interface to recover the liquid;
- and
- step 9:
- starting the hydraulic press for separating the upper die and the lower die, and using the robot arm to pick, so as to form the entire plate.