Three-Dimensional Heat Transfer and Temperature Analysis for the Welding Components

• Main Authors: Hung-Pin Yu, 余宏彬
• Other Authors: 葉榮華
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/57913987000189240495

碩士 === 國立海洋大學 === 航運技術研究所 === 87 === This study investigates the temperature distribution of aluminum plates welded by gas tungsten arc (GTA). A numerical scheme was developed to solve the three-dimensional problem. The steady-state temperature profiles of the welded plate were solved by finite difference method. In addition, an experiment is performed to verify the theoretical results. The data compared favorably with predicted values. Since the temperature variation in the plates is a decisive factor in deformation during welding, the energy dissipated from source and the heat transferred from the welded plates should be well understood. With the help of the computer model, the effects of welding parameters on weld penetration in moderately thick plates were discussed. These parameters are the heat input of the weld, the thickness of the work piece, the preheating of the work piece, and the moving velocity of heat source.