Improved geometric accuracy in single-point incremental forming of aerospace superalloy 625 using Taguchi desirability function analysis
AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY(2023)
摘要
PurposeThis present research aims to identify the optimum process parameters for enhancing geometric accuracy in single-point incremental forming of aviation-grade superalloy 625. Design/methodology/approachThe geometric accuracy has been measured in terms of half-cone-angle, concentricity, roundness and wall-straightness errors. The Taguchi Orthogonal-Array L9 with desirability-function-analysis has been used to achieve improved accuracy. FindingsTo achieve maximum geometric accuracy, the optimum setting having a tooltip diameter of 10 mm, a step-size of 0.2 mm and a tool rotation speed (TRS) of 900 RPM has been derived. With this setting, the half-cone-angle accuracy increases by 42.96%, the concentricity errors decrease by 47.36%, the roundness errors decline by 45.2% and the wall straightness errors reduce by 1.06%. Practical implicationsSuperalloy 625 is a widespread nickel-based alloy, finding enormous applications in aerospace, marine and chemical industries. Originality/valueIt has been recommended to increase TRS, reduce step-size and use moderate size tooltip diameter to enhance geometric accuracy. Step-size has been found to be the governing parameter among all the parameters.
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关键词
Single-point incremental forming,Desirability-function-analysis,ANOVA,Accuracy,Superalloy 625
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