The Experiment in which this tool is to be used is mainly focused on the parameters of Cutting Forces and Tool Life
Tool Life , Cutting force , Surface finish and Temperature at cutting area
It depends how you design your experiments. Eg. For tool life study, you may consider coated vs non-coated inserts or different types of coatings (TiN, TiNAl). Also, it will be interesting to look into chip breakers. One of the important parameters is edge geometry of the insert (chamfered, honed etc.) as Ti-alloys have work hardening tendency. Once, you have finalised experiments you may contact any tool manufacturer for the recommendations.
As speak Munish, you have differents ways to resolve your work.
Another point of view is to search ISO S quality inserts, because this type of quality is appropiate to machining titanium alloys.
One more thing: hard metal inserts with PVD coating are better for this purpose than with CVD coating, because PVD coating is thinner. The machining of Titanium alloys is better when people using inserts with sharp edge. So, more thinner the coating, more sharp the cutting edge.
I suggest you to use coated carbide or carbide M-grade with cooling fluid as water (not lubricant).
Titanium alloys (Ti64 included) are difficult to machine due to combination of their thermal and mechanical properties. Unfortunately, coated carbide inserts have not been very successful. However PVD coated inserts (coated by pulsed DC unbalanced magnetron sputtering technique and HiPIMS technique) seem to provide better performance as compared to CVD or electron beam PVD coated tools.
You may attempt to use uncoated carbide inserts but of sub-micron grade - i.e. the grain size of the carbides is less than 1 micron (typically 0.8 micron). Then you can employ high pressure cooling with soluble oil or cryogenic cooling with liquid nitrogen.
Dear Madhukar,
Ti5 grade may show vast machining challenges on performance criteria like metallurgical aspect, chip formation, cutting tool wear, lubrication strategy and surface integrity. During machining of this type of alloy difficult to machine because of the high amount of heat produced at the cutting region which affected the machining process As we know the Ti is a poor conductor of heat because heat, generated by the cutting action, does not dissipate quickly. With the increase in cutting speeds, the magnitude of cutting forces and tool tip temperature increase. Hence, utmost heat is concentrated on the cutting edge and the tool face, can influence the tool life.
Work-hardening characteristics of titanium are such that titanium alloys generally reveal a complete absence of “built-up edge”. This may cause a thin chip to contact a relatively small area on the cutting tool face and results in high loads per unit area. These high forces, coupled with the friction developed by the chip as it passes over the cutting area; can result in a great increase in heat on a much localized portion of the cutting tool. Heat and pressure, means that tool life can be short. Hard turning is successfully replaced the EDM and Grinding for machining the very high hardness materials. Selection of suitable cutting parameters and favorable cooling environments are the key aspects which affect the entire cutting process.
Ashish
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