| 摘要 |
PURPOSE:To handle any interference of a tool path within the machining program, by installing an interfering part detector, detecting an interfering part from an intersection point between two elements of the calculated comparing form and the tool path, and a noninterfering NC data originating circuit converting the tool path of the interfering part into a noninterfering tool path. CONSTITUTION:A comparing form originating circuit 5 applies size and shift reference value of a working tool to pocket form element data for a work subject, and it calculates a closed region along the contour of a pocket. A tool path originating circuit 6 gives a direction to the pocket form element data and calculates the closed region of the tool path at each shift. An interfering part detector 7 calculates an interfering part from an intersection point between two elements of the calculated comparing form and the tool path. At the time of machining, a noninterfering tool path, leaving finishing allowance behind along the contouring form, is formed, and when the intersection of the tool path is caused in the midway of shifting a cutter in consecutive order, it is made to run till it is intersected with the noninterfering tool path on an extension line of the tool path, and afterward, it is made to run on the noninterfering tool path.
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