Device for incremental stamping by magnetic forming and associated method

Abstract

Device to produce a stamped part includes a punch having a bearing surface, an anvil, a die and a magnetic field generator, provided in the punch, level with the bearing surface. The device is configured, in an initial position, so that: the bearing surface of the punch receives a portion of a first face of the blank, the anvil and the magnetic field generator are placed on either side of the same portion of the blank. The magnetic field generator being opposite a first face and the anvil opposite a second face of the blank, at a distance from the second face. The die is placed opposite the second face, level with another portion of the blank. The magnetic field generator applies pressure on the blank in a direction Z′Z of the anvil. The device includes two actuators to move the punch and the anvil, respectively, in the direction Z′Z.

1 - 5 . (canceled) 
     
     
         6 . A stamping device to produce a stamped part from a blank, comprising:
 a punch comprising a bearing surface;   an anvil;   a die;   a magnetic field generator, disposed in the punch, at the bearing surface;   the stamping device being configured, in an initial position, such that:
 the bearing surface of the punch is configured to receive a portion of a first face of the blank; 
 the anvil and the magnetic field generator are configured to be disposed on either side of a same portion of the blank; 
 the magnetic field generator facing a first face of the blank and the anvil facing a second face of the blank, opposite the first face, at a distance from the second face; and 
 the die configured to be disposed facing the second face, at another portion of the blank; 
   the magnetic field generator configured to apply a pressure on the blank in a direction Z′Z of the anvil;   a first actuator arranged to displace the punch, relative to the die, in the direction Z′Z; and   a second actuator arranged to displace the anvil, relative to the die, in the direction Z′Z.   
     
     
         7 . The stamping device according to  claim 6 , wherein the first actuator comprises a linear actuator. 
     
     
         8 . The stamping device according to  claim 6 , wherein the magnetic field generator is in a form of a flat coil. 
     
     
         9 . The stamping device according to  claim 6 , further comprises a blank holder configured to maintain the other portion of the blank against the die. 
     
     
         10 . A method for stamping a blank by magnetic pulse, using the stamping device according to claim  1 , to produce a stamped part, comprising steps of:
 positioning the blank in the stamping device;   subjecting the blank to a magnetic field caused by the magnetic field generator such that a pressure is exerted on the first face of the blank in the direction Z′Z to press the blank against the anvil;   displacing the punch and the anvil, respectively by the first actuator and the second actuator, in the direction Z′Z relative to the die; and   repeating the subjecting and displacing steps until a desired shape of the stamped part is obtained.