Abstract: The forging model for cold ROLLING is one of the ROLLING models which is used in ROLLING calculations. In this model, the final ROLLING pressure is an average value and it is not as accurate for actual and industrial cases. Also, by using forging model, friction hill curves are plotted due to the central point of ROLLING bite length while frictional stresses intersect at the neutral point of ROLLING bite. In this study, a new model based on the forging model is presented to determine the ROLLING pressure during cold ROLLING process for using in a reversing tandem mill, where this is called “Improved forging model”. In the proposed model, the intersection of the frictional forces is the neutral point. Finally, the computing results from this new model coincide well with the precedent investigations.

Obtaining temperature distribution data of slabs under ROLLING is essential as the mechanical and metallurgical properties of the metal under this process vary with temperature. Using the control volume method, a mathematical model is employed in this study to predict slab temperature in the hot roll process at Mobarakeh Steel Company. The effects of different parameters including the heat resulting from plastic deformation and slab material are investigated. Additionally, heat conduction along the ROLLING direction in the slab, ignored in most previous studies, is included in our investigation. The study indicates the importance of this term in the accuracy of the results obtained.

The viscoelastic effect of rubber material on creation of ROLLING resistance is responsible for 10-33% dissipation of supplied power at the tire/road interaction surface. So, evaluating this kind of loss is very essential in any analysis concerned with energy saving. The transient dynamic analysis for including the ROLLING effects of the tire requires long CPU time and the obtained results are prone to considerable numerical oscillations. By adding the equivalent loads to static interaction of tire with the road, an efficient 3D FE analysis is presented for evaluating the dissipated energy of a ROLLING tire. The results closely match the related experimental and numerical investigations.

ROLLING process pelletizer which provides more efficient pelletizing technique that eases bio-fertilizers production had been designed. The designed mechanisms were centered on the dynamics of the machine components that consist mainly of links and joints. Tensions and loads were determined by following the force balance equations. Bearings were selected from the SKF bearing catalogue by considering their positions, evaluation of the demands of the failure theories alongside with the dynamic load carrying capacities. Stability test was conducted on conveyor/mixing shaft of mass 11.2561kg and density 8000kg/m3 by fixing one end and applying pressure of 1.061x10-3N/mm2 towards the other end in line with demands of distortion energy theory. Frame stability test was also conducted by applying beam mesh that generated 354 nodes and 334 elements. Tension of 205.2N and 126.5N were calculated at the pulley. Various loads and moments acting on different shafts were determined and represented diagrammatically. Von mises stress of 1.847E+00N/mm2 on conveyor shaft and upper bound axial and bending stress of 2.759E+06N/m2 on the frame that was below material’s yield strength of 2.068E+08N/m2 based on the result of simulation test indicated stability of the design. The design is expected to function as well in similar production areas.