In this paper the effect of the springback on the bending operation of different materials are studied. Dies were designed and constructed in cylindrical shape. Three types of alloys are used; aluminum alloy 7020 T6, copper alloy and lead alloy. These alloys have different sheet thickness (2 and 4) mm. Bending was done by using the press of 80 ton. The springback is calculated by published equation. It can be concluded that, the Aluminum sheets (AA7020 T6) have the biggest springback factor, the springback factor equal one in lead alloy of 2 mm thickness that indicated there is no spring back in this sheet. Also concluded that the hardness of the sheet increased, the springback back factor increased too. Also in the aluminum and copper sheets when the thickness increased the spring back factor increased while in the lead alloy when the thickness increased the springback factor decreased.

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