Ultrasonic Drilling Machine

Ultrasonic drilling is a non-traditional, loose abrasive machining process. The Ultrasonic waves are sound waves of frequency higher than 20,000 Hz. ¨

Ultrasonic waves can be generated using mechanical, electromagnetic and thermal energy sources. They can be produced in gasses (including air), liquids and solids.

In the process of Ultrasonic drilling, material is removed by micro-chipping or erosion with abrasive particles. v

The tool is oscillated by a piezoelectric transducer and an electric oscillator at a frequency of about 20 kHz. The tool forces the abrasive grits, in the gap between the tool and the work piece, to impact normally on the work surface, thereby machining the work surface.

The smaller the grit size, lesser the momentum it receives from the tool. As the tool continues to move downwards, the force acting on larger grits increases rapidly, therefore some of the grits may be fractured. Eventually, the tool comes to the end of its strike and grits with size larger than the minimum gap will penetrate into the tool and work surface to different extents.