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New approaches for improved efficiency and flexibility in process chains of press hardening

Presentation held at ASME 2015 International Mechanical Engineering Congress & Exposition, IMECE 2015, November 13-19, 2015, Houston, Texas
: Schieck, Frank; Landgrebe, Dirk; Schönherr, Julia; Pierschel, Norbert; Polster, Stefan; Mosel, Andre

presentation urn:nbn:de:0011-n-3742889 (5.2 MByte PDF)
MD5 Fingerprint: 6526f5bef0277a5e0cc5e847cef9e1c6
Created on: 15.1.2016

2015, 30 Folien
International Mechanical Engineering Congress and Exposition (IMECE) <2015, Houston/Tex.>
Presentation, Electronic Publication
Fraunhofer IWU ()
press hardening; process chain; resource & energy efficiency; Tailored tempering; Intelligent Process Management

In the last decade, press hardening has become a fully established technology in both science and industry for the production of ultra-high-strength structural components, especially in the automotive industry. Beside the improvement of car performance such as safety and lightweight design, the production process is also one focus of trends in technology development in the field of press hardening.
This paper presents an overview about alternative approaches for optimized process chains of press hardening, also including pre- and post-processing in addition to the actual forming and quenching process. Investigations on direct contact heating technology show new prospects regarding fast and flexible austenitization of blanks at compact device dimensions. By applying high speed impact cutting (HSIC) for trimming of press hardened parts, an alternative technology is available to substitute the slow and energy-intensive laser trimming in today's press hardening lines. Combined with stroke-to-stroke control based on measuring of process-relevant parameters, a readjustment of the production line is possible in order to produce each part with individual, optimal process parameters to realize zero defect production of property-graded press hardened components with constant high part quality.
Significant research in the field of press hardening was carried out at Fraunhofer Institute for Machine Tools and Forming Technology IWU, in the hot forming model process chain which enables the running of experiments under conditions similar to industrial scales. All practical tests were prepared by design of experiments and assisted by thermo-mechanical FE simulations.