Method for reshaping metal sheet for housing structure of e.g. tailgate of passenger car, involves defining material stock and carrying out complete development in region of pre-tensioned workpiece before supplementary drawing step

摘要

#CMT# #/CMT# The method involves deforming workpiece (1) to form deep edges (14) or flanges between forming punch and die (3). The workpiece is pulled and/or stretched and pre-tensioned by die insert (5) in a supplementary drawing step (6). A material stock is defined in the supplementary drawing step. Complete development in the region of pre-tensioned workpiece is carried out spatially, using the die before supplementary drawing step. #CMT# : #/CMT# An independent claim is included for device for reshaping workpiece. #CMT#USE : #/CMT# Method for reshaping workpiece e.g. metal sheet for producing housing structure for tailgate and headlight of passenger car. #CMT#ADVANTAGE : #/CMT# Deep flanges can be formed easily in the workpiece and quality of the workpiece can be improved. The restriction bolt is provided in the position of dead center so that unwanted deformation of the workpiece is prevented. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view of the device for reshaping workpiece. 1 : Workpiece 3 : Die 5 : Die insert 6 : Supplementary drawing step 14 : Deep edge.