Clinching of inductively heated aluminum die casting

authored by: Sinan Yarcu, Bernd Arno Behrens, Sven Huebner, Torsten Schuchardt, Klaus Dilger, Thomas Paul Meichsner
Abstract: The aim of the investigations described in this article is to improve the clinching of aluminum die casting. The focus is on clinching an aluminum die casting alloy by local heat treatment and hence to join them in a process-safe manner. For this purpose, a heating strategy is used to warm up the die casting alloys to reduce temporarily and reversibly the elongation and the yield strength in the material. In preliminary investigations, three different heating strategies (heating plate, resistance heating and inductive heating) have been investigated. Induction heating has been selected as the most suitable method due to the short heating time and the production of crack-free clinch points. In this paper, two clinching tool systems (one with a flexible die, one with a rigid die) were used. For these tools, two inductors with different diameter were manufactured. The effects of each inductor and clinching tool on an aluminum die casting alloy, such as heating time and crack behavior, were investigated. Surface images of the clinch points in regard to the heat treatment temperature were analyzed. Furthermore, the characteristic parameters of the joints such as interlock, bottom thickness and neck thickness were examined. In addition, the strength of the joined parts was investigated by head tension tests. The results of the developed method showed that it is possible to produce crack-free clinching joints below 6 s. Furthermore, the local heating led to an increasing interlock resulting in a 26% increase of the head tensile strength.
Organisation(s): Institute of Metal Forming and Metal Forming Machines
External Organisation(s): Technische Universität Braunschweig
Gusswerke Saarbrücken GmbH
Type: Article
Journal: Production Engineering
Volume: 16
Pages: 223-233
No. of pages: 11
ISSN: 0944-6524
Publication date: 04.2022
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Mechanical Engineering, Industrial and Manufacturing Engineering
Electronic version(s): https://doi.org/10.1007/s11740-022-01116-z (Access: Open)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{d64e9893f57443399bf09979c671c22b,
title = "Clinching of inductively heated aluminum die casting",
abstract = "The aim of the investigations described in this article is to improve the clinching of aluminum die casting. The focus is on clinching an aluminum die casting alloy by local heat treatment and hence to join them in a process-safe manner. For this purpose, a heating strategy is used to warm up the die casting alloys to reduce temporarily and reversibly the elongation and the yield strength in the material. In preliminary investigations, three different heating strategies (heating plate, resistance heating and inductive heating) have been investigated. Induction heating has been selected as the most suitable method due to the short heating time and the production of crack-free clinch points. In this paper, two clinching tool systems (one with a flexible die, one with a rigid die) were used. For these tools, two inductors with different diameter were manufactured. The effects of each inductor and clinching tool on an aluminum die casting alloy, such as heating time and crack behavior, were investigated. Surface images of the clinch points in regard to the heat treatment temperature were analyzed. Furthermore, the characteristic parameters of the joints such as interlock, bottom thickness and neck thickness were examined. In addition, the strength of the joined parts was investigated by head tension tests. The results of the developed method showed that it is possible to produce crack-free clinching joints below 6 s. Furthermore, the local heating led to an increasing interlock resulting in a 26% increase of the head tensile strength.",
keywords = "Clinching, Die casting, Heated clinching, Joint, Tempered clinching",
author = "Sinan Yarcu and Behrens, {Bernd Arno} and Sven Huebner and Torsten Schuchardt and Klaus Dilger and Meichsner, {Thomas Paul}",
note = "Funding Information: The project{\' } Clinching of Aluminium Die Casting Ref.-No. AiF 20279N 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 Climate Action (BMWK) on the basis of a decision by the German Bundestag. Furthermore, the authors would like to thank the industrial partners in this research project. ",
year = "2022",
month = apr,
doi = "10.1007/s11740-022-01116-z",
language = "English",
volume = "16",
pages = "223--233",
journal = "Production Engineering",
issn = "0944-6524",
publisher = "Springer Verlag",
number = "2-3",
}