A STUDY ON MATHEMATICAL-MODELING OF PARAMETER OPTIMIZATION IN GAS TUNGSTEN ARC (GTA) WELDING OF THIN PIPES

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In order to estimate the optimal process parameter in circumferential GTA welding of thin pipes, the objective was chosen to maintain a uniform bead width otter the full circumferential joint, while the constraints consist of the capacity limit of power source and related equipments. The analytical solution of heat conduction equation with a Gaussian heat source was adopted for calculating the temperature field in circumferential welding of the pipe workpiece. The linear complementary problem (LCP) with Lemke's pivoting algorithm and Powell's unconstrained search method with the sequential unconstrained minimization technique (SUMT) haw been applied to evaluate the optimal welding current and welding velocity for a required bead width, respectively The experimental results of the bead formation showed that the developed mathematical model can be effectively applied for obtaining the optimal welding condition in circumferential welding of thin pipes with a small diameter.
Publisher
ASME-AMER SOC MECHANICAL ENG
Issue Date
1995-02
Language
English
Article Type
Article
Citation

JOURNAL OF ENGINEERING FOR INDUSTRY-TRANSACTIONS OF THE ASME, v.117, no.1, pp.78 - 83

ISSN
0022-0817
URI
http://hdl.handle.net/10203/76850
Appears in Collection
ME-Journal Papers(저널논문)
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