| 摘要 |
PURPOSE:To make such tool pass data as having no waste motion formable automatically, by installing a memory and a data forming part for each of rectangular machining, rough machining and finish machining, in case of design and manufacture of a metal mold or the like. CONSTITUTION:Work external forms (P1, P2, P3 and P4) and a cutting work zone A are stored in an input part from the drawing made by a CAD. And, this cutting work zone A is divided into a rectangular machining zone L1, a roughting machining zone L2 and a finish machining part, and an optimum tool pass is outputted at a pocket machining data forming part, a rough machining data forming part and a finish machining data forming part in succession and outputted as NC data. At the zone L1, pocket machining takes place, and at the zone L2, straight machining of full lines l and l takes place, and such a zone as no machining of a dotted line l' is controlled for rapid traverse. At the finish machining part, finish machine by data along a curve takes place, and with this constitution, machining by the tool pass of no waste motion is performed.
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