Abstract
This paper presents an experimental and practical study of the lamination of aluminium bands, determining the widening and the influence of various factors upon the widening. Two samples were laminated from two aluminium alloys, in the shape of bands. The points of the widening graph were drawn depending on the relative reduction for the two samples. For practical purposes, special importance is given to the preliminary determination of the value for the widening. Various factors influence the widening in lamination: the increase in the absolute reduction, the distribution of the reduction on passings, the shape of the deformation area, the ratio between the width and the length of the deformation area, the diameter of cylinders, the width of the semi products, the coefficient of friction, the lack of uniformity in the deformation. The widening is an important technological feature in the lamination process which needs to be monitored taking into consideration the factors that influence it in order to obtain finished products with high dimensional precision and reduced execution tolerance.
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