Effect Of Die’s Shape, Sheet Thickness and Type of Alloy on the Springback Phenomenon


In this paper the effect of the springback on the bending operation of differentmaterials and alloys have been studied. Dies were designed and constructed indifferent shape ( U-die , V-die) for several sheet’s thickness. Two types of alloyswere used; Aluminum Alloy 7020 T6 and Brass Alloy. These alloys have differentsheet thickness (2, 4, 6 and 8) mm. Aluminum alloys are heated to 270 °C and330°C with cooling in the furnace for 90 min. while the brass alloys heated to 300,320, 340 and 420 °C with cooling for 2 hours in furnace. Bending was done byusing the press of 80 ton. The springback is calculated by published equation. Itcan be concluded that, the springback phenomenon caused to enlarge the externaldimensions when releasing the load and thick material have less springback due tothe enlarge of the plastic deformation. It’s found that the die’s shapes have greateffect on the springback, and when the temperature of the specimen is increased,caused decreased in the springback.