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Abstract
The upper-bound model developed by Wilson and Halliday for solid-lubricant entrainment in metalforming operations is refined to include the effect of workpiece rounding at the die entrance on lubricant entrainment in hydrostatic extrusion. The analysis is verified by means of film thickness measurements on hydrostatic extrusions with a variety of workpiece materials, lubricants and die angles. The model is shown to be a good predictor of entrained film thickness.
Presented at the 34th Annual Meeting in St. Louis, Missouri, April 30–May 3, 1979
Notes
Presented at the 34th Annual Meeting in St. Louis, Missouri, April 30–May 3, 1979