Ultrasonic Machining
The specialized process of ultrasonic machining utilizes a small-amplitude (about 0.04 mm) and high-frequency vibration (for example, 20,000 Hz). The ultrasonic vibrations, produced by an ultrasonic wave generator, drive the tuned form tool that is made of malleable metal. Abrasive grit is supplied as a slurry to the interface, and the workpiece surface is gradually eroded (Figure 3.4b).