Simulation of the deformation of strip between stands during the process of rolling with a loop

Increased requirements for the dimensional accuracy of rolled products demand the analysis of the causes of product dimensional deviations to be carried out in greater detail and accuracy. For a continuous rolling mill, the inter-stand tension in the strip is one of the main reasons for these deviations. Usually, this tension is not constant during rolling due to changing rolling process parameters. For this reason, the rolling process is accomplished with a loop. This is especially important for the finishing group of stands of a continuous rolling mill. In practice, however, even rolling with a loop does not always guarantee the required dimensional tolerances of the finished product. The results of the theoretical analysis of forces, strengths and deformation resulting in the loop of the strip as it passes between the stands is discussed in the paper. The computer simulation of this process using the FORGE 3D program is also presented. It has been shown that alternate plastic bending of the strip in the inter-stand distance leads to a change in the strip dimensions.