Cost-efficient designs of aluminum autobody structures consist mainly of stampings using conventional technology. Progress in metallurgy and forming processes has enabled aluminum body panels to achieve significant market share, particularly for hoods. Fast bake hardening alloys with better hemming performance were developed for improved outer panel sheet products. Specific guidelines for handling and press working were established to form aluminum panels using similar schedules and production lines as steel parts. Stamping productivity was improved by optimization of the trimming process to reduce sliver/particle generation and resulting end-of-line manual rework. Both hemming formability and trimming quality not only depend on tooling setup but also on microstructural features, which govern intrinsic alloy ductility. Targets for the next high volume aluminum car body applications, such as roof panels and doors, require higher strength and/or better formability. The challenges of complex stampings can be met with optimized alloys and lubricants, with improved numerical simulation to fine-tune stamping process parameters, and with the introduction of new technologies. Warm forming was examined as a potential breakthrough technology for high volume stamping of complex geometries.
Overview of forming and formability issues for high volume aluminum car body panels
Übersichtsbericht über die Aluminiumlegierungen für den Karosseriebau und deren Umformbarkeit sowie die angewendeten Umformtechniken
2006
8 Seiten, 9 Bilder, 16 Quellen
Aufsatz (Konferenz)
Englisch
Comparison of Formability between Steel and Aluminum Fender Panels
SAE Technical Papers | 2021
|NTRS | 1976
|Forming of Automotive Aluminum Body Panels by Sheet Hydroforming
Tema Archiv | 2013
|Recent Developments in Press Formability of Aluminum Alloy Sheets for Automotive Panels
SAE Technical Papers | 1993
|