Combined deep drawing and fusion bonding of structural FRP-metal hybrid parts

authored by: Bernd-Arno Behrens, Klaus Dilger, Kristian Lippky, Lukas Kaempf, Sven Hübner, Sven Hartwig, Yunus Altun, Max Gabriel, Ehsan Farahmand, Moritz Micke-Camuz
Abstract: This research describes the development of a combined process of forming and thermal joining without adhesives of high strength steels and organosheets. In order to achieve cycle times below 20 s the temperature of the forming tool remains constant at 110 °C throughout the process. Thus, the removal of the component can take place immediately after the forming process without cooling of the forming tool. The thermal energy required to assure the thermal joining process at 280 °C at the beginning of the intermediate forming step is applied by means of heating the steel in a furnace before the transfer to the forming tool. By choosing certain coating depended heat treatment parameters during the heating step, galvannealed rough surfaces of the steel blanks can be generated in order to increase the joint strength. The paper includes a surface analysis and lap-shear testing results to quantify the respective joint strength to be achieved with the proposed surface treatment. In addition tensile test results of the heated DP800 steel to characterize the thermal influence on the mechanical properties of the heated high-strength steels will be shown. Furthermore the paper presents a tool concept with a graded blank holder to perform stretching of the metal on the one hand and draping of the organosheet on the other hand as well as preliminary forming results.
Organisation(s): Institute of Metal Forming and Metal Forming Machines
External Organisation(s): Technische Universität Braunschweig
Type: Conference article
Journal: Procedia Manufacturing
Volume: 29
Pages: 296-304
No. of pages: 9
ISSN: 2351-9789
Publication date: 04.04.2019
Publication status: E-pub ahead of print
Peer reviewed: Yes
ASJC Scopus subject areas: Industrial and Manufacturing Engineering, Artificial Intelligence
Electronic version(s): https://doi.org/10.1016/j.promfg.2019.02.141 (Access: Open)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{389b9b00c9e64bb297920ec9c7690976,
title = "Combined deep drawing and fusion bonding of structural FRP-metal hybrid parts",
abstract = "This research describes the development of a combined process of forming and thermal joining without adhesives of high strength steels and organosheets. In order to achieve cycle times below 20 s the temperature of the forming tool remains constant at 110 °C throughout the process. Thus, the removal of the component can take place immediately after the forming process without cooling of the forming tool. The thermal energy required to assure the thermal joining process at 280 °C at the beginning of the intermediate forming step is applied by means of heating the steel in a furnace before the transfer to the forming tool. By choosing certain coating depended heat treatment parameters during the heating step, galvannealed rough surfaces of the steel blanks can be generated in order to increase the joint strength. The paper includes a surface analysis and lap-shear testing results to quantify the respective joint strength to be achieved with the proposed surface treatment. In addition tensile test results of the heated DP800 steel to characterize the thermal influence on the mechanical properties of the heated high-strength steels will be shown. Furthermore the paper presents a tool concept with a graded blank holder to perform stretching of the metal on the one hand and draping of the organosheet on the other hand as well as preliminary forming results.",
keywords = "Deep drawing, Fusion bonding, Hybrid structures",
author = "Bernd-Arno Behrens and Klaus Dilger and Kristian Lippky and Lukas Kaempf and Sven H{\"u}bner and Sven Hartwig and Yunus Altun and Max Gabriel and Ehsan Farahmand and Moritz Micke-Camuz",
note = "Funding information: The IGF-project 19560 N was financed and supervised by the European Research Association for Sheet Metal Working (EFB). In the scope of the program to promote Industrial Collective Research it was funded by the German Federation of Industrial Research Associations (AiF) with means of the Federal Ministry of Economic Affairs and Energy (BMWi) on the basis of a decision by the German Bundestag. The authors would like to thank the financers and the industrial partners of this research project.; 18th International Conference on Sheet Metal, SHEMET 2019 ; Conference date: 15-04-2019 Through 17-04-2019",
year = "2019",
month = apr,
day = "4",
doi = "10.1016/j.promfg.2019.02.141",
language = "English",
volume = "29",
pages = "296--304",
journal = "Procedia Manufacturing",
issn = "2351-9789",
publisher = "Elsevier BV",
}