Evaluation of Sheet Metal Leveling Based on Elimination of Coilset Residual Stress

Flexible media such as tape, web or sheet metal are commonly used in the mass production manufacturing. In the modern manufacturing process, about one third of the steel production is converted to sheet metal [1]. Sheet metal is normally winded and stored into coil form which can be easily tranported. However, when it is unwinded for metal forming process such as press stamping, laser cutting or any other forming process, sheet metal will have coilset residual stress which can cause defects from the forming process. The coilset residual stress is caused by the way the sheet metal is stored and packaged [2]. Therefore, in order to eliminate such residual stress, leveing process is carried out to eliminate common coilset residual stress.