An experimental study on the examination of springback of sheet metals with several thicknesses and properties in bending dies

The bending dies have significant importance in the sheet metals product industry. Moreover, the springback of the sheet metal should be taken into consideration in the bending die design. The amount of springback should be known in order to produce bent sheet metal parts within acceptable tolerance limits. In this research, an experimental study has been carried out on the determination of springback of bent products. Hence, the amount of springback of several sheet metals with different bending angles was obtained on a modular “V” bending die, which was designed and constructed, and the springback graphics were plotted. The results showed that these are in line with the results of previous researchers. The springback graphics for six different kinds of materials were realised by using four different bending methods in 18 different modular dies. The effects of bending methods on springback and convenience of the obtained graphics were discussed in detail. The results of the tests were evaluated statistically by using a personal computer and converted into graphics and tables. The useful data for practical design of bending dies by taking the springback into consideration was achieved with this study.