论文信息 - Sharp flanging and flat hemming of aluminum exterior body panels

Sharp flanging and flat hemming of aluminum exterior body panels

Limitations of conventional flanging and hemming technologies require increased radii of flanges and roped hems when aluminum alloys are used for production of closure panels. A new process of flanging has been developed based upon the idea of redistributing plastic strains through the larger area, delivering additional metal into the bending zone, and creating an additional axial compression. Comparison of the newly developed and conventional flanging process indicated that the new process expands the bending ability of aluminum alloy 6111-T4 by allowing an additional 10% of prestrain to the panel compared with previous forming operations. The advantages of the new flanging operation can be transferred to the hemming operation by allowing an additional 10% of prestrain through the whole sequence of forming and assembly operations. Employment of suggested flanging technology makes possible the flat hemming operation of panels stamped from aluminum alloy 6111-T4 if the thickness of the interior panel is 1 mm or more.

Sergey Fedorovich Golovashchenko | S. Golovashchenko

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