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Development of Welding Distortion Control Method for Thin Panel Block Structure(I)  

허주호 (대우조선해양(주) 선박해양구조연구팀)
김상일 (로이드선급협회 울산지부)
Publication Information
Journal of Welding and Joining / v.21, no.4, 2003 , pp. 75-79 More about this Journal
Abstract
The welding distortion of a hull structure in the shipbuilding industry is inevitable at each assembly stage. This geometric inaccuracy caused by the welding distortion tends to preclude the introduction of automation and mechanization and needs the additional man-hours for the adjusting work at the following assembly stage. To overcome this problem, a distortion control method should be applied. For this purpose, it is necessary to develop an accurate prediction method which can explicitly account for the influence of various factors on the welding distortion. The validity of the prediction method must be also clarified through experiments. For the purpose of reducing the weld-induced bending deflection, this paper proposes the plastic counter-deforming method (PCDM) using the line heating as the optimum distortion control method. The validity of this method has been substantiated by a number of numerical simulations and actual measurements.
Keywords
Welding distortion; Geometric inaccuracy; Adjusting work; Distortion control method; Plastic counter-deforming method (PCDM);
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