Hatch IAS research topics

Abstract: An algorithm for the analysis of rollgap phenomena in thin strip and foil rolling where there is a large ratio of roll flattening to strip thickness, is described. this draws on the work of Fleck et al who developed a foil rolling model which assumed homogeneous compression and calculated the deformed roll shape by the application of influence functions. Their results obtained for rolling aluminium foil gave reasonable agreement with measurements. The new model includes strip temperature and strain rate analysis, and is applicable to a range of aluminium foil and thin steel strip applications, including tinplate, tinplate temper rolling and double reduction rolling. for each case, typical predicted pressure distributions and deformed roll shapes are presented. A comparison of the results obtained with measured data and conventional circular-arc rolling theories is presented. The effect of using different friction coefficient laws is also demonstrated as part of an investigation into speed effects associated with strain rate and hydrodynamic lubrication. A major feature of the algorithm is the short execution time which is one to two orders of magnitude faster than that of the Fleck model.  mailto:hatchias_info@hatch.ca for a copy of this paper.

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