About this Abstract |
Meeting |
2020 AWS Professional Program
|
Symposium
|
2020 AWS Professional Program
|
Presentation Title |
Modeling of Mash Seam Welding Using Improved Electro-thermo-mechanical Simulation |
Author(s) |
Fernando Okigami, Alexey Kuprienko, Wei Zhang, Bruce Krakauer |
On-Site Speaker (Planned) |
Fernando Okigami |
Abstract Scope |
Mash seam welding (MSW), a variant of resistance seam welding, is widely used in mass production of goods such as water tank shells due to its high throughput. During welding, two electric conducting sheets are held in an overlapping configuration between a pair of electrode wheels. Weld seam is then produced by Joule heating in combination with mechanical pressure exerted by the wheels, resulting in essentially a heating and forging process. In this study, the bond formation was numerically studied using an electro-thermo-mechanical simulation with improved definition of electrical contact resistance. Particularly, such resistance data were computed as a function of both temperature and contact pressure based on equations available for resistance spot welding in the literature. The data were extrapolated to the region of MSW where the peak contact pressure was about 5 times higher than that in resistance spot welding. The calculated joint profile was validated against the experimental data for cold rolling without electrical current as well as that for MSW. The calculated temperature and deformation fields were used to explain the nugget formation during MSW. |
Proceedings Inclusion? |
Definite: Other |