Abstract
Effect of oiliness agents in the lower-viscosity base oil than those which are generally used for deep drawing on drawability and observations on the surface condition of drawn cups of 1200-O aluminum sheet were studied.The limiting drawing ratio under the identical drawing speed increases by the use of higher-viscosity lubricating oils, and those values using high-viscosity oils are greater than using low-viscosity oils during the whole drawing speed. The drawing force decreases with increasing the viscosity of oils. The skin roughness on the drawn cups becomes flatter face with low-viscosity oils, and increase with higher-viscosity oils. The surface damages on the drawn cups are observed with the optical interference microscope. The amount of metal transfer of worked materials adhered to the drawing die under the identical drawing speed is the greatest degrees with ISO VG2L of the lowest oil in this experiment, and decreases with increasing the viscosity of oils.
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