In this study, an innovative technique of embossing process of sheet metal is presented. Such technique involves simultaneous embossing on both sides utilizing multiple punches. This technique has advantages over the embossing method conducted in one side of the sheet only utilizing a die. In embossing with a die, since only one side of the sheet is being processed, the residual stress in both sides of the embossed sheet is different, and it may cause warp to occur. Moreover, decreasing the pitch between emboss is restricted or limited with the tool and die used in forming. In an attempt to overcome these limitations, a process that performs embossing simultaneously on both sides utilizing multiple punches has been explored. In this study, simultaneous embossing on both sides of soft aluminum has been conducted and the mechanical properties of the embossed sheet are then investigated. Results showed that the bending rigidity of the embossed specimen increases with the emboss height. It was found out that the value of tensile strength and total elongation has no appreciable difference from that of plain sheet at θ=450 direction.
ISSN 2244-0410 (Print)
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