| 摘要 |
PROBLEM TO BE SOLVED: To apply an inner peripheral surface treatment to a cylindrical object to be treated with a horn for high-frequency oscillation under normal attitude by bending a jet including cavitation bubbles to the direction substantially perpendicular to the direction of the jet or in an angle near that direction by a guide member. SOLUTION: With at least the inner peripheral surface side of the hole of the object 20 to be treated filled with a liquid, the end of the horn 15 is inserted into the one end opening of the hole 29 of the object at an interval for flowing the liquid. A jet guide member 55 is inserted into the other end opening of the hole of the object, and the horn is opposed to the jet guide member. The jet f including cavitation bubbles generated by the high-frequency oscillation of the horn is guided by the jet guide member, and changes its direction to the direction toward the inner peripheral surface of the hole of the object. COPYRIGHT: (C)2008,JPO&INPIT
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