| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a corner portion working tool easily performing deburring or corner portion shape forming without reducing a quality of an inner wall surface of a hole or selecting a proper rotation condition, by bringing the blade portion for deburring or corner portion shape forming into contact with only a hole end surface. <P>SOLUTION: This corner portion working tool includes: a body portion 4 having a space 5 through which a cutting fluid can pass; and a blade portion 8 that is provided in the body portion 4 and can be displaced outwardly of the body portion 4. The blade portion 8 is displaced outwardly of the body portion 4 according to a change in hydrostatic pressure of the cutting fluid having passed through the space 5, and the body portion 4 is rotated to work a corner portion with the blade portion 8. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
