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JWJ > Volume 26(2); 2008 > Article
Journal of KWJS 2008 April;26(2) :85-91.
Published online June 18, 2008.
A Study on the Optimization for a V-groove GMA Welding Process Using a Dual Response Method
Hyoung-Jin Park, Seungho Ahn, Munjin Kang, Sehun Rhee



Correspondence:   Published online June 18, 2008
ABSTRACT
  In general, the quality of a welding process tends to vary with depending on the work environment or external disturbances. Hence, in order to achieve the desirable quality of welding, we should have the optimal welding condition that is not significantly affected by these changes in the environment or external disturbances. In this study, we used a dual response surface method in consideration of both the mean output variables and the standard deviation in order to optimize the V-groove arc welding process. The input variables for GMA welding process with the dual response surface are welding voltage, welding current and welding speed. The output variables are the welding quality function using the shape factor of bead geometry. First, we performed welding experiment on the interested area according to the central composite design. From the results obtained, we derived the regression model on the mean and standard deviation between the input and output variables of the welding process and then obtained the dual response surface. Finally, using the grid search method, we obtained the input variables that minimize the object function which led to the optimal V-groove arc welding process.
Keywords: Central composite design;Dual response surface method;Bead geometry;Object function;Optimization;V-groove GMA Welding
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