Matrix set for stamping by drawing sheet metal on a press to form an outer body panel for a motor vehicle, and process for forming an outer body panel for a motor vehicle

摘要

"MATRIX SET FOR STAMPING BY STRETCHING METAL SHEET IN A PRESS TO CONFORM AN EXTERNAL BODY PANEL FOR A MOTORIZED VEHICLE, AND, PROCESS FOR CONFORMING AN EXTERNAL BODY PANEL FOR A MOTORIZED VEHICLE" A process and apparatus for conforming an external process for a motor vehicle. The process comprises assembling a sheet of metallic material (16) in a matrix assembly, subjecting the first peripheral portion of the sheet of metallic material between holding surfaces of the matrix assembly (18), moving the holding surfaces in relation to a central matrix structure of in order to deform the metal plate on the central matrix structure, subject the second peripheral portion of the metallic material plate between a matrix support of the matrix assembly and the central matrix structure after the metal plate is deformed on the central matrix structure, move the surfaces with respect to the central matrix structure to stretch the metal plate over the central matrix structure after the second peripheral portion of the metallic material plate is held, and to stamp the metallic material plate between the central structure and an opposite matrix surface after the metal sheet has been stretched over the matrix structure so to provide the metal plate with a desired configuration.