| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize an entire length of an oscillation device, facilitate adjustment of resonance frequency, and easily mount a tool to the front surface of horn. SOLUTION: In a torsional oscillator 10 for ultrasonic machining, the front body 11 of a torsional oscillator 10A is entirely integrated in axial symmetry, the entire length is a half-wavelength of the resonance frequency, the front body 11 has a cylindrical part 23 having a step for adjusting the frequency. The tip of the front body 11 is provided with a tool mounting part 25.
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