Device for stamping by magnetic forming and associated method

Abstract

A device for stamping a blank in order to produce a stamped part. The device includes a punch including a bearing surface, an anvil, and magnetic field generator. The stamping device has an initial position where the bearing surface of the punch receives a portion of a first surface of the blank, the anvil and the magnetic field generator are arranged on either side of another portion of the blank, with the anvil facing the first surface, and the magnetic field generator facing a second surface opposite the first surface. The magnetic field generator applies a pressure on the blank in a direction towards the anvil. The stamping device is also configured to move the punch relative to the magnetic field generator in a direction away from the anvil.

What is claimed is: 
     
         1 . A Device for stamping a blank in order to produce a stamped part comprising:
 a punch comprising a bearing surface,   an anvil,   means for generating a magnetic field,   said device for stamping being configured, in an initial position, in such a way that:   the bearing surface of the punch is intended for receiving a portion of a first surface of the blank,   the anvil and the means for generating a magnetic field are intended for being arranged on either side of another portion of the blank,   with the anvil facing the first surface, and the means for generating a magnetic field facing a second surface, opposite the first surface, at a distance from said second surface,   said means for generating a magnetic field being intended and configured to apply a pressure on the blank towards the anvil, in a direction ZZ′, thrusting said blank on said anvil,   the device for stamping comprising movement means arranged to move the punch, relative to the means for generating a magnetic field, in a direction opposite the direction ZZ′.   
     
     
         2 . The device for stamping according to  claim 1 , wherein the movement means comprise a linear actuator. 
     
     
         3 . The device for stamping according to  claim 1 , comprising adjusting means configured to adjust the space between the anvil and the means for generating a magnetic field. 
     
     
         4 . The device for stamping according to  claim 1 , comprising a blank-holder configured to impose a retaining pressure on the movement of the blank, against the punch. 
     
     
         5 . A method for stamping by magnetic pulse a blank in order to produce a stamped part, using a device for stamping in accordance with  claim 1 , comprising:
 a) positioning the blank in the device for stamping,   b) subjecting the blank to a magnetic field caused by the means for generating a magnetic field in such a way that a pressure is exerted on the second surface of the blank in a direction ZZ′ and thrusts said blank against the anvil, and   c) moving the punch by the movement means in a direction opposite the direction ZZ′,   with the steps b) and c) being repeated until the desired shape is obtained for the finished stamped part.   
     
     
         6 . The method for stamping according to  claim 5 , wherein as the punch moves, a radial pressure is exerted on the blank in the direction of said punch, thrusting said blank on said punch.