The Optimization of Welding Tool Material and Welding Parameters in Friction Stir Spot Welding of Plastics Using Taguchi Experimental Design

Yıl 2018, Cilt: 2 Sayı: 2, 47 - 53, 30.06.2018

Ahmet İrfan Yükler , Mustafa Kemal Bılıcı , Memduh Kurtulmus , Alim Kastan

Öz

Abstract- In recent years, friction stir spot welding (FSSW) is widely used as
a joining method espically in the automotive industry. This method has been
found of use in joining of plastics. The welding parameters and the tool
material have very significant effects in FSSW joining. Welding tool material
is very important in FSSW because the tool generates heat in welding and
cooling rate in the solidification period. In this study, the dependence of the
lap shear fracture load on the FSSW welding parameters (tool rotational speed,
tool plunge depth, tool dwell time) and different heat transfer coefficient of
the welding tool have been investigated. “The highest -the better” quality
control characteristic using the Analysis of Variance (ANOVA) method was used
to find the optimum welding parameters. The experiments were arranged by using
Taguchi‟s L16 orthogonal array. The results have been analyzed by the graphical
methods and numarical data. The most spectucular result of this study was the
effect of tool material on the weld strength. The welding tool heat transfer
coefficient and the tool rotation speed were observed very effective and
important on FSSW weld strength of high density polyethylene sheets, Finally,
the improvement in the weld strength from the initial welding parameters to the
optimal welding parameters was found about 22%. 

Anahtar Kelimeler

Thermoplastics FSSW, Taguchi method, FSSW tool

Kaynakça

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