Multiobjective optimization of process variables in single-point incremental forming using grey relational analysis coupled with entropy weights

Abstract

Incremental sheet forming is a specific group of sheet forming methods that enable the manufacture of complex parts utilizing computer numerical control instead of specialized tools. It is an incredibly adaptable operation that involves minimal usage of sophisticated tools, dies, and forming presses. Besides its main application in the field of rapid prototyping, incremental sheet forming processes can be used for the manufacture of unique parts in small batches. The goal of this study is to broaden the knowledge of the deformation process in single-point incremental forming. This work studies the deformation behavior in single-point incremental forming by experimentally investigating the principal stresses, principal strains, and thinning of single-point incremental forming products. Conical-shaped components are fabricated using AA1050-H14 aluminum alloy at various combinations of fundamental variables. The factorial design is employed to plan the experimental study and analysis of variance is conducted to analyze the results. The grey relational analysis approach coupled with entropy weights is also implemented to identify optimum process variables for single-point incremental forming. The results show that the tool diameter has the greatest effect on the thinning of the SPIF product, followed by the sheet thickness, step size, and feed rate.

Investigation of surface roughness in multi point incremental sheet metal forming

“…Dabwan et al [12]conducted multiobjective optimization in SPIF using GRA coupled with entropy analysis. Ajay et al [13]studies SPIF of titanium alloy sheets.…”

Multi-Response Optimization of Additively Manufactured Ti6Al4V Component Using Grey Relational Analysis Coupled with Entropy Weights

“…Grey relational analysis (GRA) with entropy weights can solve multi-response optimization problems involving multiple criteria, and its use in multi-response problems has acquired popularity [25][26][27]. Dabwan et al [28] applied the grey relational method with entropy weights to identify the optimal process parameters for single-point incremental forming products and found that the tool diameter has the greatest effect on the thinning of the single-point incremental forming process. She et al [29] optimized the bending performance of optical fibers by employing grey relational analysis and discovered that the bending loss decreased by an order of magnitude.…”

Deep drawability of electron beam welded tailored blanks of commercially pure titanium thin sheets

“…The investigation of the forming behaviour under different processes like stretch forming, 16,17 deep drawing 18,19 and incremental sheet metal forming 20,21 is essential as the material undergoes different deformation modes under these processes. Especially, the investigation of the deep drawing behaviour of CP Ti is of much interest for the fabrication of sheet metal components.…”