Abstract
A drill processing to the difficult to cut material such as ceramics, hardened steel, glass and heat-resistant steel is widely requested in the industrial world. Furthermore the drilling process becomes more and more difficult in the case of that the requested hole diameter is less than one millimeter. In order to achieve requirements for drilling process, ultrasonically assisted machining is applicable. Ultrasonic vibration assisted machining techniques are suitable to machine difficult-to-cut materials precisely. The ultrasonic vibration assisted sub-millimeter drilling process reduces the cutting forces and prevents severe wear of tools. In this report, high speed camera with synchronizing strobe LED light sources is adopted to visualize the process of ultrasonic drilling based on the photoelastic analysis. The effect of the ultrasonic vibration on drill was experimentally considered.
