Finite Element Simulation of Skin-Pass and Temper Rolling Processes with special emphasis on Roughness Transfer
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Proceedings NAFEMS World Congress 2005 Malta Engineering Simulation
Skin-passing and temper rolling represent the final process steps within the production chain of cold rolled flat steel products, in which material and surface properties as well as flatness of the cold rolled strip can be tailored and customised to satisfy even the highest tolerance demands. To attain a comprehensive understanding of the underlying process details, to check and tune semi-analytical model approaches, highly sophisticated numerical approaches, based on the method of finite elements, have been performed by utilizing the non-linear capabilities of both Abaqus Standard and Explicit.
The key criterion in skin-passing is the transfer of a well defined topological sructure and waviness onto the strip’s surface. These properties are important for subsequent processing steps, such as painting, welding and further deformation processes like deep-drawing. The task can be accomplished by utilizing either the conventional wet temper system, where a water-agent mixture is applied to the rolls and strip, or by the dry temper technique, where a combination of rotating and oscillating brushes cleans all particles sticking to the roll surface.In the skin-pass rolling process the steel sheet’s surface structure is produced utilizing some kind of “stamping effect” between the work roll surface and the steel sheet. Apart from basic studies using regular work roll surface geometries, the transfer process of surface structure seems to be rather unexplored at least for realistic, especially stochastic surface structures, Our goal is to develop more insight into this process especially for stochastic surface structures as they are typically produced by modern electro discharge texturing techniques (EDT).