Successive forging of tailored blank having thickness distribution for hot stamping
- 150 Downloads
A successive forging process of tailored blanks having a thickness distribution supplied for hot stamping was developed. In this process, a blank having a uniform thickness was successively compressed with the upper and lower punches, simultaneously. Since local deformation was repeated in successive forging, the forging load is comparatively small, and tailored blanks without joining are produced similar to the tailor rolling process. The thickness was controlled only by the feed under a fixed stroke of the punch. As the feed decreases, the forging load decreases due to small contact area, and thus, the reduction in thickness of the blank becomes large for small elastic deformation of the press and tools. Tool marks appearing on the surface of the tailored blank were prevented by inserting concave and convex plates into a C-frame of a press. A tailored blank having two thicknesses was successively forged, and then hot-stamped into a roof rail.
KeywordsSuccessive forging Tailored blank Thickness distribution Elastic deformation Hot stamping
Unable to display preview. Download preview PDF.
- 4.Lamprecht K, Geiger M (2005) Advanced numerical modeling of patchwork blank forming processes. Proceedings of the 8th International Conference on Technology of Plasticity 567–568Google Scholar
- 5.Lamprecht K, Merklein M, Geiger M (2005) Hydroforming of patchwork blanks-numerical modeling and experimental validation. Proceedings of the 6th International Conference and Workshop on Numerical Simulation of 3D Sheet Forming Processes 526–531Google Scholar
- 18.Berglund D, Amundsson K, Hellgren L O (2008) Hot stamped components with “soft zones” for improved crashworthiness-simulation and validation of product performance. Proceedings of International Deep Drawing Research Group 675–686Google Scholar
- 25.Kim D H, Moon M B, Kim Y J, Kim Y G, Kim K S (2011) Lightweight car body manufactured through hot stamping and tailor welding of blanks. Steel Research International Special edition 414–418Google Scholar
- 26.Perez-Santiago R, Billur E, Ademaj A, Sarmiento C, Berlanga R, Altan T (2013) Hot stamping a B-pillar with tailored properties: experiments and preliminary simulation results. Proceedings of 4th International Conference Hot Sheet Metal Forming of High-Performance Steel CHS2 83–90Google Scholar