Ultrasonic-assisted vibration tapping using taps with different coatings

A machine vision for assessing and inspecting the ratio of thread areas associated with fixed frequency (FF) and limited tracing frequency (LTF) ultrasonic-assisted vibration was presented using differently coated taps after tapping of Ti-6Al-4V alloys. Experimental results indicate that TiAlN Micran taps yield the best tapping quality for different coatings and tapping conditions. TiAlN Micran coated taps with LTF make the largest improvement over traditional tapping (TT), with an average increase of 30.2 %.