Abstract

Spiral groove shape machining is possible by wire electric discharge machining with the addition of a rotary axis. Furthermore, by adding a two-axis rotary axis that can rotate and tilt, we have performed spiral groove machining that changes the groove width. The combination of the rotation direction and the tilt direction determines whether the groove width becomes narrower or wider. The previous report was a process in which the groove width was widened by forward rotation and downward tilt. At that time, we compared and examined the machining accuracy of the NC program generation method. In this report, machining was performed with the remaining three types of combinations of rotation and tilt, and the shape accuracy was compared along with the difference in NC program. In all the results, it was found that the groove width tends to be widened on the entrance side of the groove machining, and the groove width becomes closer to the design shape as the machining progresses.

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