Thesis supervisor: Péter Zoltán Kovács
Location of studies (in Hungarian): Institute of Materials Sciences and Technology Abbreviation of location of studies: ATI
Description of the research topic:
The correct and reliable operation of a mechanical structure is decisively influenced by the joints of its individual structural elements. In their selection and design, the function of the structure is the determining factor. In addition, the requirements for the joints must be taken into account: the strength, elongation, sealing, mobility, mountability, looseness, feasibility, economy, design, etc. of the joint. The range of sheet materials used in the automotive industry is very wide: manufacturers can choose the most suitable materials for a given purpose and application from a wide range of materials, and it is also common to use sheets of different materials, different thicknesses and properties. However, these sheets must be combined in some way to produce the proper final product. There is also a wide range of processes for combining sheet metal parts. Several methods can be used to combine materials. These are the main groups: welding and various soldering, gluing processes and last but not least mechanical joining, or even combinations thereof. Manufacturers' choice is influenced by which process is suitable for making the appropriate join between the sheets they use, at what cost they can provide equipment, raw materials and labor and one of the main criteria today is how mechanized that process is, as it greatly influences production times, the number of human resources required, and thus the price of the product, and ultimately the economics of production. Together, these criteria determine which procedure is used to select manufacturers. The main goal of the research is to determine the optimal technological parameters of mechanical joints (cline joints), to analyze the formability using different material qualities, to increase the available accuracy. A particularly important area in the research is the effect of various technological parameters (eg.: sheet thickness, material quality, tool parameters). Experimental studies and finite element modeling are required to perform the studies.
Theory of modeling and appropriate knowledge of its technology, Computer skills, CADCAM systems and FEM methods
• J. E. Gould: Joining Aluminium Sheet in the Automotive Industry – A 30 Year
History, Welding research, January 2012, Vol. 91. (2012), https://app.aws.org/wj/supplement/WJ_2012_01_s23.pdf
• Kovács, P; Tisza, M: Investigation of clinch joints made of similar and dissimilar materials, IOP Conference Series: Materials Science and Engineering, 426 Paper: 012028, 10 p. (2018) https://iopscience.iop.org/article/10.1088/1757-899X/426/1/012028/pdf
• Xingang Zhang, Chao Chen: Experimental investigation of joining aluminum alloy sheets by stepped mechanical clinching, Journal of Materials Research and Technology, Volume 19, July–August 2022, pp. 566-577. https://doi.org/10.1016/j.jmrt.2022.05.046
• Robert Kupfer, Daniel Köhler, David Römisch, Simon Wituschek, Lars Ewenz, Jan Kalich, Deborah Weiß, Behdad Sadeghian, Matthias Busch, Jan Krüger, Moritz Neuser, Olexandr Grydin, Max Böhnke, Christian-Roman Bielak, Juliane Troschitz: Clinching of Aluminum Materials – Methods for the Continuous Characterization of Process, Microstructure and Properties, Journal of Advanced Joining Processes, Volume 5, June 2022, 100108, https://doi.org/10.1016/j.jajp.2022.100108
• Xiaolei Gao, Chao Chen: Joining three aluminium alloy sheets by square clinching process, Materials Science and Technology, Volume 38, Issue 15, https://doi.org/10.1080/02670836.2022.2074125
• Péter Zoltán Kovács, Szabolcs Jónás: Examination of Three-Layered Clinch Joints, Key Engineering Materials (Volume 952), August 2023, pp.61-67., https://doi.org/10.4028/p-Ivjsq2
Number of students who can be accepted: 1
Deadline for application: 2024-12-31
2024. IV. 17. ODT ülés Az ODT következő ülésére 2024. június 14-én, pénteken 10.00 órakor kerül sor a Semmelweis Egyetem Szenátusi termében (Bp. Üllői út 26. I. emelet).
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