Method for the production of sheet metal components and device therefor

Abstract

The disclosure relates to a method and a device for the production of dimensionally accurate sheet metal components.

1 - 16 . (canceled) 
     
     
         17 . A method of manufacturing a sheet metal component, the method comprising:
 preforming of a sheet to form a sheet preform in a preforming tool, the sheet preform having at least one flangeless section in its longitudinal extent and excess sheet material at least in some regions; and   final forming of the sheet metal preform into a sheet metal component in a calibrating tool comprising at least one calibrating punch and at least one calibrating die, in which the excess sheet material in the sheet metal preform is compressed by relative movement between the calibrating punch and the calibrating die;   wherein during the final forming process, an edge of the sheet metal preform present at least in the flangeless section comes into contact with a slide shoulder provided on a slide which can be moved essentially horizontally, is supported thereon and is subjected to pressure.   
     
     
         18 . The method according to  claim 17 , wherein the sheet metal preform is inserted into the calibrating tool in such a way that its opening points downwards and is positioned on the calibrating die. 
     
     
         19 . The method according to  claim 17 , wherein the slider ( 23 ) is moved in the direction of the calibrating punch during the relative movement between the calibrating die and the calibration punch to such an extent that a defined distance between the slider and the calibrating punch is selected at least in the region of the flangeless section of the sheet metal preform, which distance corresponds to the material thickness of the sheet metal used plus >0 to 0.35 mm. 
     
     
         20 . The method according to  claim 17 , wherein the sheet metal preform is provided with a bottom, which is acted upon with an excess sheet metal material at least in the flangeless section in the course of preforming, such that a bottom region has been produced during preforming, so that the sheet metal preform is positioned on the calibrating punch at least via the precurved bottom region at least in the region of the flangeless section of the sheet metal preform in such a way that the edge of the sheet metal preform present at least in the flangeless section is arranged above the slider shoulder. 
     
     
         21 . The method according to  claim 17 , wherein the sheet metal preform is provided with a bottom, in which embossments have been produced during preforming, so that the sheet metal preform is positioned at least via the embossments on the calibrating punch in such a way that the edge of the sheet metal preform present at least in the flangeless section is arranged above the slider shoulder. 
     
     
         22 . The method according to  claim 17 , wherein the sheet metal preform is provided with a bottom, wherein at least a partial region of the bottom, when the sheet metal preform is inserted into the calibrating tool, comes into contact with at least one adjustable insert, which is spaced apart from the calibrating punch when the sheet metal preform is inserted into the calibrating tool, and the sheet metal preform is positioned on the insert at least via the partial region of the base at least in the region of the flangeless section of the sheet metal preform in such a way that the edge of the sheet metal preform present at least in the flangeless section is arranged above the slider shoulder. 
     
     
         23 . The method according to  claim 17 , wherein the slider is controlled in such a way that it assumes an end position which is set between 10 and 80 mm before the bottom dead center of the calibrating tool is reached. 
     
     
         24 . A device for manufacturing a sheet metal component, for carrying out the method according to claim  1 , the device comprising:
 at least one preforming tool for preforming a sheet into a sheet preform, the sheet preform having at least one flangeless section in its longitudinal extension and excess sheet material at least in some regions; and   at least one calibrating tool for final forming of the sheet metal preform into a sheet metal component, wherein the calibrating tool comprises at least one calibrating punch, at least one calibrating die and at least one substantially horizontally movable slide, wherein the excess sheet material in the sheet metal preform is compressed by the relative movement between the calibrating punch and the calibrating die;   wherein the slider has a slider shoulder, which is provided at least in the flangeless section of the sheet metal preform, so that the edge of the sheet metal preform present at least in the flangeless section can be brought into contact with the slider shoulder of the slider by the relative movement, can be supported thereon and can be subjected to a pressure.   
     
     
         25 . The device according to  claim 24 , wherein the slider is configured such that it covers less than 50% of a lateral height of the sheet metal component to be manufactured. 
     
     
         26 . The device according to  claim 24 , wherein the slider shoulder is configured as a projection of the slider and the calibrating punch has a recess on one or both sides at least in the flangeless section of the sheet metal preform, in which recess the projection of the slider can be received during the final forming of the sheet metal preform. 
     
     
         27 . The device according to  claim 24 , wherein the slider has on its upper side facing the calibrating die at least one projection or several projections and/or at least one recess or several recesses at least in the flangeless section of the sheet metal preform and also the calibrating die has on its lower side facing the slider at least one projection or several projections and/or at least one recess or several recesses at least in the flangeless section of the sheet metal preform, so that during the final forming of the sheet metal preform the projection on the underside of the calibrating die is configured to be accommodated in the recess on the upper side of the slider and, conversely, the projection on the upper side of the slider is configured to be accommodated in the recess on the underside of the calibration die. 
     
     
         28 . The device according to  claim 24 , wherein the calibrating punch comprises at least one adjustable insert arranged in the calibrating punch, which insert can be spaced apart from the calibrating punch. 
     
     
         29 . The device according to  claim 24 , wherein the slider is driven mechanically, hydraulically, pneumatically, electromagnetically. 
     
     
         30 . The device according to  claim 24  wherein the slider is fixed in an end position during the final forming of the sheet metal preform. 
     
     
         31 . The device according to  claim 24 , wherein the slider is configured to be controlled in such a way that it assumes an end position which can be set between 10 and 80 mm before the bottom dead center of the calibrating tool is reached. 
     
     
         32 . The device according to  claim 24 , wherein the slider ledge is designed perpendicular to the frame or inclined at an angle of +/−30° to the vertical of the frame. 
     
     
         32 . The device according to  claim 24 , wherein the device is integrated in one of a press line, a transfer press and a progressive press.