Abstract:The drilling on titanium alloy (TC4) performance of TiAlN coated carbide twist drill was investigated
focusing on the influence of cutting parameterson drilling axial force, surface roughness of hole wall and chip shape.
The results showed that drilling axial force increases with the increase of feed rate. Drilling axial force increase with
the decrease of speed. The exponential formula models of drilling force were obtained through regression analysis meth鄄
od and the regulation of the drilling force about TC4 influenced by the feed and cutting speedwas obtained. The error of
the equation has been tested less than 7%. With the increase of feed rate,chip breakability increase and chip length
get shorter gradually. When feed rate is 50mm/ min and speed is low,chip morphology is short spiral chips, and chip
removal and hole side roughness are the best
