Effects of Sliding Speed, Surface Extension, Viscosity of Lubricant and Tool Pressure on Material Pick-Up to Tool Surface

摘要

Continuous indentation tests of a flat tool on to a spiral trapezoidalthread shaped around a rotating workpiece are carried out to estimatematerial pick-up to tool surface by using aluminium as a workpiece materialwith several lubricants for wire drawing. The effects of slidingspeed, extension of surface area, viscosity of lubricant and tool pressureon material pick-up are investigated. An empirical equation representinga critical condition under which material pick-up occurs is presentedand the viscosity of the lubricant has the greatest effect on thematerial pick-up.