| 摘要 |
PROBLEM TO BE SOLVED: To perform overlap control in increased time efficiency by obtaining a start position of an overlap passage while working, reducing loads on a programmer and avoiding interference reliably between worked objects and tools. SOLUTION: An interpretation part 12 of a numerical control device 10 identifies an overlap command from a working program and sends fast-forward information on two consecutive fast-forward blocks at a corner part of the worked objects to an overlap start position calculation part 23. A calculation part 23 calculates a start position of the overlap passage on the basis of two pairs of fast-forward information, shapes of the worked objects, and shapes of the tools. An overlapping timing control unit 24 monitors a blade tip position of the tools while fast-forward operation of one of the blocks and, when the blade tip position has reached the start position of the overlap passage, controls fast-forward operation of the other block. COPYRIGHT: (C)2008,JPO&INPIT
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