Investigation into Deep Drawing of Clad Sheet Metals : 2nd Report, On the Optimum Combination Conditions of the Composing Sheets

概要

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Deep drawability of clad sheet metals is investigated experimentally by using the model clad sheets in which a commercially pure hard aluminium sheet, annealed one and a brass sheet are stuck to each other by a binding agent. Based on the interaction of each composing sheet during deformation, the conditions of the optimum combination of composing sheets are summarized. In the cases of flat-headed punch the optimum conditions are that in a single-clad sheet a soft sheet is positioned at the outside of a hard one during working and these composing sheets have remarkably different values of the work-hardening exponent n and almost equal strength ratio. In the cases of round-headed punch the combinations which do not lower n are desirable and side positions of the sheet are indifferent.