چكيده به لاتين
The deep drawing process is one of the most widely used methods for forming the sheet. One of the challenges of this process is the prediction of the spring back. A spring back has an impact on the dimensions of the production unit. In the deep drawing of sensitive parts with high dimensional accuracy, designers consider this size in their design, knowing the amount of springback. Therefore knowing the spring back is very important in different process conditions and different materials. In the present study, the deep drawing process aluminum spring back in 6061, 5052, AZ31B magnesium and steel St-12 and parameters were measured and evaluated. The results of deep drawing samples show that increasing the temperature of the stretch increases the success rate of the process. The percentage of losses from 46.7% in temperature conditions is 1 to 18.2% at temperature conditions of 7. The samples of magnesium alloy B31AZ were successfully produced at high temperature with a pressure of 15 mm and a progressive speed of 5 mm / s. On the other hand, by increasing the formation temperature, the springback in the deep pull of aluminum 6061 and 5052 decreases by 64.63% and 74.66%, respectively. By comparing the springback aluminum 6061 annealed and heat treated (T6) was determined by annealing and reduction in yield strength, springback is reduced to 5%. By examining the springback of magnesium sheets AZ31B and aluminum 6061-T6, it was reduced by increasing the thickness of the springback sheet. As for the AZ31B alloy, the springback reached 1.13402% in the thickness of 1.5 mm to 0.8692% in the thickness of 1.75 mm. In the deep drawing of aluminum alloy 6061, with a thickness increase of 1 mm to 2 mm, the springback decreases from 2.80041% to 1.23211%.
Keywords:
deep drawing, spring back, hot deformation, AZ31B, Al 6061, Al 5051
