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ABSTRACT
Seam welding process parameters were optimized for joining 316 stainless-steel plates. Taguchi technique was applied for optimizing the selected welding parameters. The selected parameters were welding pressure, welding speed and welding temperature. The objective of this work is to produce weld joints with maximum impact strength. L^sub 27^ orthogonal array was selected according to the aforementioned factors with three levels and experimental tests were performed. Signal-to-noise (SN) ratio was used to evaluate the experimental results. The results indicate that the welding temperature has the greatest influence on impact strength, followed by welding pressure and speed.
Keywords: seam welding, Taguchi, stain less steel, optimization
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1. INTRODUCTION
Taguchi method is one of the optimization techniques that could be applied to optimize input welding parameters. Optimization of process parameters is the key step in the Taguchi method in achieving high quality without increasing the cost. This is because optimization of process parameters can improve performance characteristics. The optimal process parameters obtained from the Taguchi method are insensitive to the variation of environmental conditions and other noise factors (Anawa, 2008).Taguchi method is a powerful tool for the design of a high-quality system. It provides not, an efficient, but a systematic approach to optimize designs for performance and quality. Further, Taguchi parameter design can optimize the performance through the settings of design parameters and reduce the fluctuation of system performance to source of variation (Lung Kwang Pan 2004). Yang dongxia studied the optimization of weld bead geometry in laser welding with filler wire process using Taguchi's approach. It supports to improve productivities and decrease the time required for the experimental investigation, so that high-quality products can be created quickly and at low cost (Yang dongxia 2012). Khan et al., investigated the effects of energy density on geometry of the weld seam and development of microstructures at various weld zones. Energy-based local micro hardness profiles are made and linked with the formation of the microstructures. Weld resistance at the interface is energy-limited and seam profile only changes from conical to cylindrical after a certain limit of energy input (Khan, 2012). Danial Kianersi et al., (2014) optimized welding parameters namely welding current and time in resistance spot welding of the austenitic stainless steel sheets of...