Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : springback

Effect of Pre-Tension on the Springback Behavior of the Yellow Brass

Anwar H. Zabon; Aseel H. Abed

Engineering and Technology Journal, 2020, Volume 38, Issue 4A, Pages 552-560
DOI: 10.30684/etj.v38i4A.96

Springback forecasting of sheet formation is constantly remarkable problem in the métier, due to their influence the great in the definitive shape of the product. Study presents effects of pretension in tow rolling direction (0, 45 degree) on the springback behavior of the (Brass 65-35) sheet under V-die bending by an experimental. The pretension ranges from five different pretensions levels starting from 11% to 55% from total strain in each rolling direction by increment of 11%. used in punching that was performed at a constant deformation velocity of (5 mm/min) then bent on a 90° V-shaped die for the springback evaluation. The results from experiment indicate that the springback increase with pretension ratio and the springback in 45 degree is higher in rolling direction.

Study the Optimization Parameters for Spring Back Phenomena in U-Die Bending

Khalida K.Mansor; Aseel Hamad; Karem M.Younis

Engineering and Technology Journal, 2013, Volume 31, Issue 9, Pages 1705-1718

The main objective of the research is to find the optimum parameters that reduce the springback by using the commercially [SPSS] program to analysis data and find the best parameters which given lowest springback in the U-die bending. A commercial aluminum alloy [AL-1050] sheet (0.9 mm) thickness that founded when punch speed increase the springback increase, when rolling direction angle is 90 Lower springback, and when increase the dwell time decrease the springback, and the value of parameters predicted from [SPSS] have lower springback and obtain a goal dimension for the products. And predict the springback value by especial equations which given correlation coefficient 95.4% between the observed value of the dependent variable and the predicted value.

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

Bushra Rasheed Mohameed; Ethar Mohamed Mhdi Mubarak; Nawal H. Alsalihi

Engineering and Technology Journal, 2012, Volume 30, Issue 9, Pages 1446-1461

In this paper the effect of the springback on the bending operation of different
materials and alloys have been studied. Dies were designed and constructed in
different shape ( U-die , V-die) for several sheet’s thickness. Two types of alloys
were used; Aluminum Alloy 7020 T6 and Brass Alloy. These alloys have different
sheet thickness (2, 4, 6 and 8) mm. Aluminum alloys are heated to 270 °C and
330°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 by
using the press of 80 ton. The springback is calculated by published equation. It
can be concluded that, the springback phenomenon caused to enlarge the external
dimensions when releasing the load and thick material have less springback due to
the enlarge of the plastic deformation. It’s found that the die’s shapes have great
effect on the springback, and when the temperature of the specimen is increased,
caused decreased in the springback.