INVESTIGATION OF EFFECTS OF VARIABLE BLANKHOLDER FORCE ON DEEP DRAWING PROCESS OF 6082 ALUMINUM ALLOY

Abstract

In this study, effects of various constant and variable blankholder force values on cup shaped cylindrical deep drawing of 6082-T6 aluminum alloy was investigated. Control of process parameters is extremely important for the effective completion of deep drawing process especially in materials in which vast amount of regional deformations occur due to high strength and low formability as in 6082-T6. It is aimed to complete deep drawing process having deep drawing ratio of 2 effectively under various constant and variable blankholder forces by considering analytically and empirically calculated blankholder forces in the literature. For this purpose, a finite element analysis (FEA) procedure which eliminates the negative environmental effects of the physical process caused by the huge amount of power consumption and waste oil generation was executed. In performed FEA studies whose accuracy was controlled via physical experiments; maximum deep drawing height, total deep drawing energy, maximum deep drawing force, average deep drawing force and thickness variation ratio values were improved by controlling the material flow without decrease in deep drawn product quality under various constant and variable blank holder forces.