Method and device for producing a half-shell part

Abstract

The invention relates to a method for producing a half-shell part with a drawing punch and a drawing die. The object of providing a method for the process-reliable and cost-effective production of highly dimensionally stable half-shell parts is achieved in that, in a single work step, the drawing punch is advanced into the drawing die, a sheet metal blank is preformed into a sheet metal raw part with at least one base section, at least one frame section and optionally a flange section, wherein during the preforming with the drawing punch a material excess is introduced either into the base section and the frame section or into the optional flange section of the sheet metal raw part, and the sheet metal raw part is finished to form a half-shell part and calibrated.

1 . Method for producing a half-shell part with a drawing punch and a drawing die, wherein a single work step the drawing punch is advanced into the drawing die, a sheet metal blank is preformed into a sheet metal raw part with at least one base section, at least one frame section and optionally a flange section, wherein the drawing punch comprises at least one base punch displaceably arranged relative to the drawing punch facing towards the drawing die, during the preforming with the drawing punch a material excess is introduced first into the base section or the frame section by moving the base punch towards the drawing die, and the sheet metal raw part is finished to form a half-shell part and is calibrated, wherein the sheet metal raw part is trimmed in the single work step. 
     
     
         2 . Method according to  claim 1 , wherein the sheet metal raw part is finished by advancing the base punch into the base punch receiver as soon as the base punch has come to rest on the sheet metal raw part abutting the drawing die, and is calibrated. 
     
     
         3 . Method according to  claim 1 , wherein the cutting edge is, at the same time as the placement of the base punch on the sheet metal raw part abutting against the drawing die, brought into contact with the sheet metal raw part. 
     
     
         4 . Method according to  claim 1 , wherein during the finishing and calibration the material excess is forced from the base section of the sheet metal raw part into the frame section of the sheet metal raw part. 
     
     
         5 . Method according to  claim 1 , wherein the sheet metal raw part is compressed using a compression surface at least in a frame section. 
     
     
         6 . Method according to  claim 1 , wherein the sheet metal blank is held at least at the start of the performing with a holddown device. 
     
     
         7 . Method according to  claim 1 , wherein a flange-free halfshell part or a flanged half-shell part is produced from the sheet metal raw part.