Stamping arrangement and use thereof

Abstract

In a stamping arrangement, during stamping a stamping punch makes contact, in the region of a punch shoulder, with a holding plate or a pressure plate between the stamping punch and holding plate. The stamping punch has a punch head and the holding plate has a receptacle for the punch head. Means for fastening the punch head to the holding plate have a pocket made in the punch head, a clamping screw screwed into a threaded bore of the holding plate, a pressure piece arranged in the axial direction of the clamping screw between the latter and the pocket, and a holding screw for the pressure piece, wherein the holding screw passes through a bore of the clamping screw and is screwed with a threaded portion into a threaded bore of the pressure piece. With the clamping screw in a screwed-in position, areal contact is made, on a side of the pocket that faces away from the punch shoulder, between a conical portion of the pressure piece and a conical portion of the pocket, and the punch shoulder bears against the holding plate or the pressure plate, wherein a screw head of the holding screw is arranged with axial play with respect to the clamping screw.

1 . A stamping arrangement having a stamping punch and a holding plate for the stamping punch, wherein the stamping punch, in a stamping stroke, makes contact in the region of a punch shoulder with the holding plate, or with a pressure plate disposed between the stamping punch and the holding plate, and the stamping punch has a punch head and the holding plate has a receptacle for the punch head, and means for fastening the punch head to the holding plate are provided, wherein the means have:
 a pocket made in the punch head,   a clamping screw screwed into a threaded bore of the holding plate,   a pressure piece arranged in the axial direction of the clamping screw between the clamping screw and the pocket, and   a holding screw for the pressure piece, wherein the holding screw passes through a bore of the clamping screw and is screwed with a threaded portion into a threaded bore of the pressure piece,   
       wherein, in a screwed-in position of the clamping screw, on a side of the pocket that is facing away from the punch shoulder, a conical portion of the pressure piece makes full-faced contact with a conical portion of the pocket, and, in this screwed-in position of the clamping screw the punch shoulder bears against the holding plate or the pressure plate, and a screw head of the holding screw is arranged with axial play with respect to the clamping screw. 
     
     
         2 . The stamping arrangement as claimed in  claim 1 , wherein an end of the pressure piece that is facing toward the pocket is of frustoconical configuration, and a peripheral region which is present there, in the region of its free end, has a flattened contact surface for the purpose of contact with the pocket. 
     
     
         3 . The stamping arrangement as claimed in  claim 2 , wherein the pocket is configured as a frustoconical recess, tapering in the direction of a floor in the pocket and having a contact surface, disposed in a peripheral region for the purpose of contact with the pressure piece. 
     
     
         4 . The stamping arrangement as claimed in  claim 3 , wherein the frustoconical recess defined by the pocket has an oval cross section. 
     
     
         5 . The stamping arrangement as claimed in  claim 3 , wherein the pressure piece, in the screwed-in position of the clamping screw, is arranged at a distance to the floor of the pocket. 
     
     
         6 . The stamping arrangement as claimed in  claim 1 , wherein means for orienting the pressure piece in a rotational direction of the pressure piece relative to the conical portion of the pocket are provided. 
     
     
         7 . The stamping arrangement as claimed in  claim 1 , wherein the clamping screw has a screw head having an outer polygon for cooperating with a screwing tool. 
     
     
         8 . The stamping arrangement as claimed in  claim 7 , wherein the screw head of the clamping screw, in the screwed-in position of the clamping screw, protrudes beyond the holding plate. 
     
     
         9 . The stamping arrangement as claimed in  claim 1 , wherein the screw head of the holding screw has an inner polygon, and wherein the screw head is disposed within the clamping screw. 
     
     
         10 . The stamping arrangement as claimed in  claim 1 , wherein the pressure plate is connected to the holding plate and is provided with a long hole which passes through the punch head. 
     
     
         11 . The stamping arrangement as claimed in  claim 1 , wherein two pockets are made in the punch head, and a corresponding pressure piece cooperates with a respective pocket, and a clamping screw and a holding screw cooperate with the corresponding pressure piece. 
     
     
         12 . The stamping arrangement as claimed in  claim 11 , wherein the pockets are identical, the clamping screws are identical, the pressure pieces are identical, and the holding screws are identical. 
     
     
         13 . The stamping arrangement as claimed in  claim 1 , wherein the holding plate has two receptacles and the punch head has two head portions, wherein a respective head portion is inserted into a respective receptacle and each head portion has a pocket. 
     
     
         14 . The stamping arrangement as claimed in  claim 1 , wherein the punch head is guided in the holding plate in the spatial directions arranged perpendicular to the direction of insertion into the holding plate. 
     
     
         15 . Use of the stamping arrangement as claimed in  claim 1  in a stamping unit with a stripping force per stamping punch greater than about 50 kN and less than about 100 kN.