42nd International Deep Drawing Research Group Conference - IDDRG 2023

In this work, we present and evaluate a new approach for prototype tooling in deep drawing based on direct polymer additive tooling. With Fused Deposition Modeling (FDM) a PLA shell is printed additively. Afterwards, these are filled with ultra-high performance concrete (UHPC). UHPC is characterized by its higher strength properties compared to conventional concrete materials, which makes the...

With the increased focus on reducing carbon emissions in the automotive industry, more advanced materials are introduced to reduce the vehicle weight, and more complex component geometries are designed to both satisfy customer demands and to optimize the vehicle aerodynamically. With the increase in component complexity, the strain paths produced during the forming operation of car body...

Proportions of high- and ultra-high strength steels are constantly increasing in modern car bodies. In the press shop there are uncertainties concerning the application of steels with strength higher than 1000MPa particularly concerning shear cutting processes. To support the steel user regarding a tool material and coating and the wear behavior, long-term shear cutting test had been carried...

In this work, Vanadis 6 cold work tool steel was vacuum austenitized, room temperature quenched, differently cryogenically treated (-75, -140 and -196 °C for different durations) and double tempered, in the range 170 – 530 °C. Two kinds of wear performance assessment were used: pin-on-disc and reciprocating sliding wear tests, by using a ball-on-flat contact configuration. Pin-on-disc testing...

Deep drawing processes are greatly influenced by the blank holder forces, as well as their local distribution. In current deep drawing tools, this pressure distribution is dominated by the compliance of the specific machine the tool is mounted on. Therefore, each tool must be manually polished to enable the desired distribution of the blank holder pressure. This regularly causes problems when...

Hot stamping is a commonly used procedure to manufacture components from high strength steels, which are used for parts of car bodies. Against the background of production efficiency and costs, there is a number of factors which determine the performance of tools used in hot stamping, e.g. cycle time in production and lifetime of the tools. Main requirement is a high wear resistance, while...

High requirements on the CO² emission of cars, lead to the production of new filter systems with complex geometries. In this paper, the effect of manufacturing oval tubular components instead of circular components for the exhaust system is investigated numerically and experimentally. For this purpose, the manufacturing process is divided into the forming process and the stuffing process. In...

Dimensional deviations of stamped car body components caused by elastic springback still represent a significant problem for the development of the stamping tools. First, the springback causes deviations of the part in vertical direction to the part surface. Second, the surface area of the part is being changed by elastic membrane stresses resulting in a contraction of the surface but,...

Demands for lightweightening and crashworthiness of the vehicle body have increased. For this purpose, advanced high strength steel to the automobile body was regarded as a solution with respect to manufacturing cost and impact energy absorption. However, increasing the strength of the automotive steel sheet lead to a diversity of problems caused by the tool wear due to higher forming load...