SWING DISCHARGE MACHINING METHOD AND SWING DISCHARGE MACHINING APPARATUS IN ENGRAVING DISCHARGE MACHINING OPERATION

PROBLEM TO BE SOLVED: To obtain a desired machining condition of a machining operation such as a drilling operation, a through-hole boring operation or the like having multi-stage machining conditions combined by an NC program, without modifying or changing the program, only by inputting and setting the number of divisions and a feed quantity of the division. SOLUTION: A position is selected that is located at a prescribed length before a feed finish position in the direction of a machining depth by the NC program. A machining feed length to a machining feed finish position from this position and a swing quantity of an enlarged swing in the direction of a side surface at the position before the feed finish position are divided into micro machining sections of a previously selected number of divisions. A swing discharge machining operation from the position before the feed finish position by the movement in the direction of depth and the direction of swing for each of the micro division machining sections is sequentially advanced to the feed finish position without changing an electric machining condition to the position before the feed finish position by deciding whether or not the machining operation is completed for each of the micro division machining sections to switch to a next machining operation of the NC program. COPYRIGHT: (C)2010,JPO&INPIT