| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultrasonic processing method and device capable of performing a boring process, etc., for minute and high-quality holes. SOLUTION: The tip of a processing tool 20 is pressed onto a work 16, and a processing stage 15 heaved by a processing spring 28 is depressed together with the work 16 against the spring force, and the processing operation is started at the depressed position as the point of origin for processing, and the processing is executed while the amount of displacement of the processing stage 15 rising in association with the processing of the work 16 is converted into the processing depth.
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