| 摘要 |
PROBLEM TO BE SOLVED: To secure a stable cutting state by screwing a cap screw on one of opposed groove side parts of a tip mounting groove, providing a tip seating surface on the other of the opposed groove side parts of the tip mounting groove and pressing and holding a cutting tip seated on the tip seating surface on the tip seating surface by the cap screw. SOLUTION: A vibrating body 14 constitutes a cutter mounting part 64 by a tip mounting groove 65 recessed on a tip outer peripheral part of a horn 23 and a screw inserting and fixing part 66 notched and formed on the tip outer peripheral part. A cap screw 63 is screwed in a female screw part 66A of the screw inserting and fixing part 66 formed on one of opposed groove side parts of the tip mounting groove 65, a tip seating surface 67 is provided on the other, and cutting tip 61 seated on the tip seating surface 67 and a pressing metal 62 are pressed and held on the tip seating surface 67 by the cap screw 63. As a result, unbalance of moment of inertia around a center axis of the vibrating body 14 can be reduced. Vibration energy generated by a torsional vibrating body is stably supplied to cutting tip 61 and a stable cutting state can be secured.
|
