Abstract
Flame forming is one of the famous methods for the forming of ship hull plates. In this work, two different irradiating schemes are used and compared for flame forming of a bowl-shaped surface. In the first scheme, spiral irradiating path is used while in the second method, combined irradiating path is used. The results show using both two irradiating schemes, a bowl shape is produced successfully in the flame forming process. However, a comparison on characteristics of the obtained bowl-shaped surfaces such as curvature, symmetry, and residual stresses shows that spiral irradiating scheme is a better and more suitable method than combined irradiating scheme. It is proved that the obtained bowl-shaped surface with spiral irradiating scheme has larger curvatures and symmetry and also lower residual stresses in comparison with the obtained bowl-shaped surface with combined irradiating scheme.
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