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The weld pool contains abundant information about the welding process and can thus be utilized to accurately monitor the weld penetration. This paper addresses the dynamic estimation of the weld penetration in GTAW process. A machine vision based weld pool sensing system is utilized and the 3D weld pool surface is reconstructed in real-time. Various dynamic experiments under different welding conditions...
In order to analyze the mechanical behavior of large prestressed steel structures in construction process, working principle of state variable superposition method and nonlinear analysis method based on mechanics of time-varying structures was studied. Flow diagrams of the two methods were established. Based on platform of ANSYS—a large finite element program, computing programs of state variable...
It has been well recognized that weld pool geometry plays a critical role in fusion welding process such as laser welding. In this study, the authors establish a standard diode laser welding system and perform a series of experiments to investigate correlations between welding parameters and the weld pool geometry. Custom digital camera for image acquisition and software for image processing are implemented...
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