Abstract
A new deep drawing process with hydraulic counter pressure and vibration to tool system was applied to deep drawing of aluminum alloy sheet (A5052P–O) in order to improve the poor lubricity of volatile lubricants. To compare the drawability with that of A5052P–O sheet, the mild steel sheet (SPCC) was also examined. Four volatile lubricants, 6211, 6215F, 6221F, 6280 were tested. In case of lubrication with 6221F and 6280, the application of the new deep drawing process can make a remarkable increase in the limiting drawing ratio (L.D.R.) of A5052P–O up to about 2.1 and a remarkable reduction of the maximum punch load. In case of 6211 and 6215F, the application of the new deep drawing process can make an increase in the limiting drawing ratio up to about 2.0 in spite of very poor lubricity of the lubricants. The effect of the application of the new deep drawing process for SPCC was smaller than that of A5052P–O.
