Friction evaluation in hot strip rolling by direct measurement in the roll gap of a model duo mill |
| |
Authors: | Jonas Lagergren |
| |
Affiliation: | a Department of Metal Forming, The Royal Institute of Technology, S-100 44, Stockholm, Sweden b SSAB Tunnplåt AB, Processdevelopment, Hot Rolled Products, S-781 84, Borlänge, Sweden |
| |
Abstract: | Using a model duo mill, and model material and lubricants, the hot strip rolling process has been simulated. The normal roll pressure, the shear stress and the shear-stress angle in the roll gap of the mill was measured by load tranducers, the purpose being to evaluate assumed frictional influencing factors, such as: strip reduction, rolling velocity, lubrication and different materials rolled. In order to improve the present simple-friction model for force calculation in hot strip rolling that uses just an average friction value, three friction models were evaluated: the friction laws by Coulomb, Tresca and Wanheim-Bay. The best model was then chosen on the basis of the measurements made in this study. Finally, suggestions for the improvement of the model of strip rolling is made. |
| |
Keywords: | Hot-rolling simulation Normal pressure Shear stress Shear strength Contact area |
本文献已被 ScienceDirect 等数据库收录! |
|