| 摘要 |
PROBLEM TO BE SOLVED: To suppress a precision change and a shape change even after recessing, by executing chip machining by a cutting blade and burnishing machining by a burnishing tool simultaneously by the rotation of an end mill. SOLUTION: An end mill 30 installed and fixed on a main shaft is rotated in the arrow-A direction, following the rotation of the main shaft of a finishing machine. As the main shaft descends toward a work piece 40 with the rate of a prescribed quantity, a blade edge 31 enters the inside of a groove 33a formed on the work piece 40 by rough recessing, and cuts the side of the groove 33a, and simultaneously a burnishing tool 34 forming the left side of the blade edge 31 rubs the bottom of the groove 33a. Hereby, chips removed by a cutting blade 32 are pushed and spread by a rake angle of the cutting blade 32, and the machining is progressed while the burnishing tool 34 generates minute plastic deformation on the bottom face of the groove 33a. The prescribed size and shape of the groove 33a is finished by repeating the machining.
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