Effect of preheating on machinability of titanium alloy

Abstract

This works presents preheating method to improve the machinability of titanium compound. With the effect of warming work piece (pre-heating) using induction coil (heating) system, speed, feed and depth were investigated in the midst of end milling process on a vertical machining center (VC450-Spinner). Additionally, WC-Co PCD inserts were positioned 25 mm apart on the mill (R390-025B25-11M/R390-170408E-NLH13A) and the effects of preheating on tool life, smoothness of the surface, force of cut, vibration/chatter, irregularities, and chips/tool morphology were examined. The execution of uncoated WC-Co was greatly implemented (directionally around multiple times appeared differently compared to room temperature machining), the tool life estimations were essentially higher than those of PCD under room temperature machining. Preheating machining reduces vibration and chatter resulting in increased cutting force and extended tool life. In addition, chip-device contact length is extended and chip serrations are formed reducing equipment wear. As a result of the experimentation, it was found that the execution of uncoated WC-Co was greatly enhanced in the preheated method. Moreover, tool life estimations with PCD at room temperature are significantly improved.