42nd International Deep Drawing Research Group Conference - IDDRG 2023

As a lightweight construction strategy, hot stamped parts of ultra-high-strength steels with tailored properties are increasingly used for crash relevant components in car bodies, e.g. as B-pillars. With the process of tailored carburization, parts can be reinforced locally without increasing the sheet metal thickness. Thus, this process has the potential to be applied to lightweight...

The increasing demands on part complexity and tailored properties in form of local strength and ductility cannot be met with a conventionally manufactured hot-stamped body part. In order to meet the requirements of safety-relevant body parts, partial hot stamping is increasingly used in the industry. One approach to achieve tailored properties on hot-stamped parts is based on controlled...

Saving CO2 by replacing fossil fuels with renewable ones has been a goal of research for several years and has become the focus of public discussion at the latest due to the electrification of passenger cars and the much-discussed carbon footprint caused by production. Hot stamping is a process for the production of ultra-high-strength components used for passenger protection in the automotive...

Press hardening grades are widely used in automotive industries for safety-critical structural parts due to its unique combination of high strength, excellent formability, and crash performance. Although general process windows are recommended by steel suppliers, achieving the targeted strength and ductility / fracture strain in the hot-stamped parts is still challenging to some hot...

Recently, the automobile industry is increasing demand for hot stamping parts due to the growth of eco-friendly vehicles with the lightening and the crash safety performance. In the hot stamping process, a high-temperature heated steel sheet is simultaneously stamped and quenched to manufacture ultra-high-strength components of 1.5GPa or more. However, it takes more than 10 to 15 seconds to...

Modern hot sheet metal forming processes offer the opportunity, especially in the automotive sector, to meet current demands for ultra-lightweight design. Due to the increased formability at the high process temperatures, high-strength aluminium alloys are increasingly coming into the focus of the industry. However, the complex thermo-mechanical interactions within these processes can lead to...

Within the deep drawing process chain, damage develops and evolves – starting with foreign particles from the slag as well as non-metallic inclusions leading to voids, which develop, accumulate and ultimately lead to failure. This damage accumulation and evolution along the process chain decisively influences the performance of components. Accordingly, the influence on the damage accumulation...

Flexible Roll Forming (FRF) is an advanced manufacturing process that can be used to form long and complex part families from hard to form materials for the automotive and truck industry. However, depending on the part complexity and material strength shape defects such as end flare, springback and twist can occur. In this work a high strength truck member (frame rails) is produced from AHSS;...

Keywords: Diaphragm compressor, metal diaphragm, single point incremental forming
Abstract.
This article deals with the development of an elastically foldable, bistable diaphragm geometry, which allows an increase of the compression volume of diaphragm compressors compared to the use of flat diaphragms. Using a Finite Element Model (FEM) in ABAQUS/Standard, a number of membrane geometries...

Currently, due to the requirement of lightweight in the transportation field, the demand for high-strength aluminum alloy is increasing, but it is difficult for the traditional forming processes to balance the three components of formability, strength and efficiency. In order to solve this problem, a novel stamping process for high-strength AA7075 aluminum alloy sheets is proposed, termed...