Influence of Tool Wear on The Cutting Forces in High Speed Green Milling of Titanium Alloys
The possessions of titanium and its alloy are expressively suitable for extreme working conditions in aerospace industries. Owing to the high affinity of tool materials for titanium, combined with high-strain hardening and low-elasticity modulus deteriorate the machinability of titanium alloys. High-speed machining (HSM) of titanium alloys is not efficient because of extremely high thermal loads developed on the tool material. However, owing to the responsibilities with regard to the social environment and workers’ health, the application of conventional cutting fluids in metal cutting requires strict regulation for the disposal of the used fluids. Therefore conducting dry machining is essential for promoting value-added sustainable and green manufacturing. An experimental investigation on the effects of machining parameters on the various machinability aspects of Ti-6Al-4V ELI was conducted, during HSM, using coated and uncoated carbide tools. The study involved the use of various machining parameters, such as cutting speed and feed rate. Machining responses that were evaluated include cutting force during the machining operations. Results show that cutting speed and feed rate significantly affected the cutting force. Meanwhile, uncoated tools outperform the TiAlN+TiN coated tools in all investigated cutting conditions. Results also show that increasing the cutting speed decreases the resultant cutting force during HSM process. Uncoated tools exhibit less cutting force when HSM Ti-6Al-4V ELI as compared to coated tools.
Keywords - Cutting Force; Green Milling; High Speed; Titanium Alloy.