SUPPORT METHOD OF ULTRASONIC VIBRATOR

To sufficiently reduce propagation of ultrasonic vibration to a rotating shaft by providing an annular protrusion having the same central axis on a disk-shaped cutting blade that performs the ultrasonic vibration and supporting an end surface of the protrusion.SOLUTION: A method includes inserting an annular plate 5 made of aluminum and having a thickness of 2 mm, an annular mesh 4 made of stainless steel, an annular plate 5 made of aluminum and having a thickness of 2 mm, a disk-shaped cutting blade 2 made of steel and having an outer diameter of 100 mm and having a piezoelectric element 3 bonded to both sides of an inner peripheral side of a ring-shaped protrusion, an annular plate 5 made of aluminum and having a thickness of 2 mm, an annular mesh 4 made of stainless steel, and an annular plate 5 made of aluminum and having a thickness of 2 mm in this order into a rotating shaft 7 made of steel of an ultrasonic device 1 which is an ultrasonic cutting device, and fastening and supporting and fixing a male screw provided at a tip end of the rotating shaft 7 and a steel nut 6 with a torque of 30 Nm. Also, the disk-shaped cutting blade 2 is not in contact with the rotating shaft 7.SELECTED DRAWING: Figure 1 【課題】 超音波振動する円盤状の切削ブレードに同じ中心軸を持つ円環状の突起を設け、その突起の端面を支持したが、回転軸への超音波振動の伝搬を十分に小さくすることはできなかった。【解決手段】 超音波切削装置である超音波装置１の鋼製の回転軸７に、アルミ製２ｍｍ厚の円環状板５、円環状のステンレス製の網４、アルミ製２ｍｍ厚の円環状板５、リング状突起より内周側に圧電素子３を両面に接合した鋼製の外径１００ｍｍ円盤状の切削ブレード２、アルミ製２ｍｍ厚の円環状板５、円環状のステンレス製の網４、アルミ製２ｍｍ厚の円環状板５の順に挿入し、回転軸７の先端部に設けたオネジと鋼製のナット６を３０Ｎｍのトルクで締め付け、支持固定した。また、円盤状の切削ブレード２は、回転軸７とは接触していない。【選択図】図１