Development of RUM Equipment

The main component of a rotary ultrasonic machine is the spindle unit comprising of an ultrasonic spindle, a power supply and a motor speed controller. The spindle unit contains an ultrasonic transducer. The power supply converts the 50 Hz electrical supply to a high frequency (20 kHz) AC output. This is fed to the piezoelectric transducer located in the spindle. The transducer converts electrical input into mechanical vibrations. By changing the setting of the output control of the power supply, the amplitude of the ultrasonic vibration can be adjusted. The rotational motion of the tool is supplied by the motor attached atop the spindle and different speeds can be obtained by adjusting the motor speed controller.

Figure 3 shows various tool shapes used for rotary ultrasonic machining. For ceramic machining, either a diamond-impregnated tool or an electro-plated tool can be used. Electro-plated tools are relatively cheaper but diamond impregnated tools are more durable (Anonymous, 1966; Cleave, 1976; Markov, 1972; Legge, 1966).

 

Back