Friction drilling is the novel method of hole making in sheet materials using the principle of hot forming. Herein the sheet material is extruded by conical carbide tool rotating at high speed and feed to form the bush which is used as bearing surface or tapped in another operation. In this paper authors have investigated the effect of friction drilling input parameters viz. rotational speed, feed and tool diameter on the responses viz. dimensional error and surface roughness of the bush. Standard geometry friction drilling tools have been used to produce the holes in hollow workpiece of AISI 1015. The statistical analysis tool Response Surface Method (RSM) has been used to develop an empirical model for the responses in terms of drilling parameters. Finally the optimization based on multiple response method which makes use of an objective function called as ‘Desirability Function’ has been used to optimize the machining conditions.
Friction Drilling, Response Surface Method, Central Composite Design, Desirability Function
