Abstract
In this paper, a feasibility study has been performed to determine if a computerized method by the numerical model of process could be used to estimate the optimal process parameter in arc welding.In the first part of this paper, a method of optimization of process parameters in arc welding has been discussed. The method is based on the numerical calculation of weld pool by a finite difference model, and a nonlinear optimization technique is applied to estimate the optimal process parameter in arc welding.In the second part of this paper, a system of on-line optimization has been developed on the basis of the above method, where the temperature in welding detected by infrared sensors is used to identify the numerical moedl. The developed system for TIG arc welding made it possible to optimize the process parameter in real time.Accordingly, it is concluded that the method based on the numerical simulation of welding process is a useful guide to the optimal process parameter in arc welding.
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