Estimanation of interface friction during radial ultrasonic compression using finite element modelling

Abstract

The main reason for using lubr icants in metal forming processes is to reduce the interfacial fricti on between the tool and workpiece. The reduction of interface friction provides many benefits to the fabrication process and end produ ct. For example, the process forming load can be lowered, tool life can be extended, and final product defects can be minimised. In current manufacturing processes involving metal forming, it is necessary to use lubricants that avoid or reduce environmental pollution. Dry and low viscosity lubricants have been used in metal working processes which contain reactive or non-reactive chemical additives that contribute to environmental pollu tion. Accordingly, some studies have been conducted to investigat e the use of ultrasonic vibration as a non-chemical lubrication medium