An Investigation into the Optimization of Loading Path in T-shape of Tube Hydroforming

Abstract

This paper addressed the modeling and optimization of loading path in T-shape hydroforming of tubes using Simulated Annealing (SA) algorithm. Analysis of variance shows that some of pre-selected parameters in loading paths have not significant effect on the deformed tube. Hence, some of optimized parameters found initially, are replaced with their own fixed optimum values in order to seek for the other parameters in more detail by the Simulated Annealing (SA) algorithm. According to the intensity of effectiveness on the deformation, six more important parameters are chosen and their minimum and maximum limitation values are determined. In this case, sixty four different tests for different loading paths are designed by Design of Experiment (DOE) and full factorial method. By using mathematical modeling all required loading parameters are obtained. Proposed models of formability embedded into Simulated Annealing algorithm and optimum value for loading parameters and optimal load paths are found. The obtained results show that more accurate loading path may be found for T-shape of tube hydroforming.

The effect of differential lubrication and counter punch on hydroforming of 5A02 thin-walled aluminum alloy Y-shaped tube

“…In order to obtain the optimal loading path, many researchers use computer programs and various algorithms to optimize the linear loading path, and verify the feasibility and superiority of the optimized loading path through experiments. [14][15][16]. Wang et al [17] proposed a ladder loading path based on the linear loading path and proved through experiments that the T-tube forming was simpler and the experimental operation would be more e cient under the stepped loading path.…”