Patent DE-102011054866-A1 (DE)
Title: Preparing hot-formed and press-hardened motor vehicle body component, comprises processing metal sheet circuit board from curable sheet steel in hot-forming and press-hardening tool, and forming area in circuit board as embossing region
Inventor: ARNS WILHELM
IPC: B21D22/00
Filed: 2011-10-27
Abstract: The method comprises processing a metal sheet circuit board from a curable sheet steel in a hot-forming and press-hardening tool, and forming an area in the metal sheet circuit board as an embossing region (2) during forming process, where the embossing region has a plateau region (4), which is displaceably arranged opposite to a surface area surrounding the plateau region by stamping a distance A, and partially cutting out the embossing region by a beam cutting operation, after the forming process. A cross-sectional transition region is formed between the embossing region and surface area. The method comprises processing a metal sheet circuit board from a curable sheet steel in a hot-forming and press-hardening tool, and forming an area in the metal sheet circuit board as an embossing region (2) during forming process, where the embossing region has a plateau region (4), which is displaceably arranged opposite to a surface area surrounding the plateau region by stamping a distance A, and partially cutting out the embossing region by a beam cutting operation, after the forming process. A cross-sectional transition region is formed between the embossing region and the surface area and formed in an S-shaped manner. The transition region is produced with a plateau portion (6) and a face portion (7), where the plateau portion is formed to the plateau region, and the face portion is formed to the surface area. The embossing region is partially cut out, after the hot-forming and press-hardening, in the plateau portion and/or the face portion of the transition region. The cutting out step is performed by a beam cutting such as a laser cutting, a water jet cutting, a plasma jet cutting or an electron-beam cutting. The cutting out step is further performed by the same cutting method that is exploited for subsequently cutting an edge region surrounding the hot-formed and press-hardened motor vehicle body component. The cutting out step is carried out at an angle (alpha ), where a cut edge has an angle (alpha ) of 10-40[deg] . The cutting out step takes place from a top side and/or a bottom side of the motor vehicle body component, where: the top side is arranged on a side, to which the embossing region is issued; and the bottom side is formed on a side opposite to the top side. A hole edge (10) of a hole has a spacing (b) of greater than 1 mm to an edge of the motor vehicle body component. A bend radius is formed to the transition region, where the plateau region is bordered/prepared by the bend radius. The hole edge is recompensed by the cutting out process and started by the cutting out process. The hole is prepared as cable bushing. The embossing regions are issued into opposing directions. The two opposite embossing regions comprise two plateau planes or a plateau plane connecting the two embossing regions, where the plateau plane is formed in an angle to the surface area. An independent claim is included for a motor vehicle body component for a motor vehicle.