Ultrasonic vibration cutting tool and production method thereof

Abstract

A ultrasonic vibration cutting tool which can optimize materials as in a separate type and can improve the transmission efficiency of ultrasonic vibration as in an integrated type. The ultrasonic vibration cutting tool comprises a ring-shaped projection and a blade essentially composed of diamond and held by the ring-shaped projection both of which are formed on the peripheral surface of a vibration conversion portion provided on a resonator, and the outer diameter of the blade is set larger than the outer diameter of the ring-shaped projection.

What is claimed is:  
     
         1 . An ultrasonic vibration cutting tool comprising a ring-shaped projection and a blade essentially composed of diamond and held by the ring-shaped projection both of which are formed on the peripheral surface of a vibration conversion portion provided on a resonator, the outer diameter of the blade being set larger than the outer diameter of the ring-shaped projection.  
     
     
         2 . A method of producing an ultrasonic vibration cutting tool comprising the steps of: 
 immersing a resonator having a vibration conversion portion and a ring-shaped projection in a plating solution containing diamond powders; and    growing a blade essentially composed of diamond with the ring-shaped projection as a seed by electroplating.    
     
     
         3 . The method of producing an ultrasonic vibration cutting tool according to  claim 2 , wherein a peripheral portion of the ring-shaped projection is removed after the growth of the blade so that the ring-shaped projection is located inside a peripheral portion of the blade.