This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effect of Tool Thermal Expansion and Durability in Friction Stir Spot Welding
Technical Paper
2007-01-1699
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Experiments were carried out to study the effect of thermal expansion of the tool during Friction Stir Spot Welding (FSSW) of large commercial automotive grade aluminum sheets. The objective of this study was to evaluate the tool “growth” using both experimental and numerical techniques and to see its effect on the weld quality (measured in terms of static strength). Two hundred friction stir spot welds were made over 25 Al sheets (A6022-T4) with a specific time interval between each sheet, thereby trying to simulate the welding conditions/sequence on a production line. An Infrared (IR) camera was used to monitor the temperature gradient on the tool during the welds. In addition, finite element analysis was run to predict the thermal expansion of the tool based on the temperature boundary conditions obtained from the IR camera during the experiment. The cross-sections of the spot welds showed an increase in plunge depth of 0.14 mm between the first and the last weld which agreed well with the simulation results. The static strength of the spot welds measured in lap shear configuration increased by approximately 20% from start till the time the tool attained steady state. In addition, a separate tool durability study showed that even after welding 25,000 spots using a single tool, the tool wear did not affect the weld quality
Recommended Content
Authors
Citation
Badarinarayan, H., Hunt, F., and Okamoto, K., "Effect of Tool Thermal Expansion and Durability in Friction Stir Spot Welding," SAE Technical Paper 2007-01-1699, 2007, https://doi.org/10.4271/2007-01-1699.Also In
References
- Sakano R. Murakami K. Yamashita K. Hyoe T. Fujimoto M. Inuzuka M. Nagao Y. Kashiki H. “Development of spot FSW robot system for automobile body members” Proc. of 3rd International Symposium. on Friction Stir Welding Kobe, Japan 2001
- Okamoto K. Hunt F. Hirano S. “Development of Friction Stir Welding Technique and Machine for Aluminum Sheet Metal Assembly -Friction Stir Welding of Aluminum for Automotive Applications (2)” 2005 SAE World Congress, Paper No. 2005-01-1254 Michigan, USA 2005
- Hunt F. Badarinarayan H. Okamoto K. “Design of Experiments for Friction Stir Stitch Welding of Aluminum Alloy 6022-T4” 2006 SAE World Congress, Paper No. 2006-01-0970 Michigan, USA 2006