The invention discloses an ultrasonic
processing device, in particular to a high-speed rotary ultrasonic torsional
processing device which comprises an output shaft and a transmission shaft. A rare-earth rod and tubular piezoelectric
ceramic are mounted in an inner bore of the output shaft from inside to outside along an axial direction sequentially. An
induction coil is wound on the output shaft, a coil former and an outer sleeve are arranged on the outer side of the transmission shaft, a closed coil storage chamber is formed by the coil former and the outer sleeve, and an
excitation coil is disposed in the coil storage chamber. The ultrasonic torsional
processing device which is manufactured on the basis of
rare earth magnetostriction materials and piezoelectric
ceramic materials is connected with a spindle of a
machine, is subjected to two-dimensional ultrasonic
mechanical vibration while driving a tool head to rotate at high speed, and thus, ultrasonic torsional processing of workpieces is achieved. Besides, the device realizes high-speed rotary ultrasonic torsional processing, ultrasonic
frequency band is wide, ultrasonic energy is high, running state is stable,
ultrasonic vibration amplitude can be regulated by changing
magnetic field intensity and prepressure, and accordingly requirements of different processing precisions can be met.