|
LI Rui
SHIH Albert Jau-Min
Department of Mechanical Engineering,
University of Michigan,
Ann Arbor, MI, USA
|
|
|
HIGH THROUGHPUT DRILLING OF
TITANIUM ALLOYS*
Abstract: he experiments of high
throughput drilling of Ti-6Al-4V at 183 m/min cutting speed and
156 mm3/s material removal rate using a 4 mm diameter WC-Co
spiral point drill are conducted. At this material removal rate,
it took only 0.57 s to drill a hole in a 6.35 mm thick Ti plate.
Supplying the cutting fluid via through-the-drill holes and the
balance of cutting speed and feed have proven to be critical for
drill life. An inverse heat transfer model is developed to
predict the heat flux and the drill temperature distribution in
drilling. A three-dimensional finite element modeling of
drilling is conducted to predict the thrust force and torque.
Experimental result demonstrates that, using proper machining
process parameters, tool geometry, and fine-grained WC-Co tool
material, the high throughput machining of Ti alloy is
technically feasible.
Key words:
Titanium Drilling High throughput Inverse heat transfer Finite
element modeling |