| 摘要 |
<P>PROBLEM TO BE SOLVED: To attain deburring and chamfering for a difficult-to-machine part, such as an exit side of a hole formed in a workpiece, with a simple structure and control. Ž<P>SOLUTION: A shaft-like tool electrode 11 extending along the center line Ct is inserted into a through-hole 15a formed in a workpiece 15 and a tip part 32 of the tool electrode 11 is disposed at an edge of the through-hole 15a on the exit side. With the center line Ct as the rotational center, the tool electrode 11 is rotated to be swung. A power supply voltage is applied between the workpiece 15 and the tool electrode 11. Since the tip part 32 of the tool electrode 11 is made to approach the edge of the through-hole 15a due to swing, a discharge clearance between the tip part 32 of the tool electrode 11 and the edge of the through-hole 15a is narrowed. As a result, discharge by a power supply voltage occurs between the tip part 32 of the tool electrode 11 and the edge of the through-hole 15a, thus the edge of the through-hole 15a is machined by electric discharge. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
