Machining simulation machine

Machining simulation machine for displaying a state of movement of a nozzle with respect to a workpiece which is instructed by a laser beam machining program on a display means by simulating said laser beam machining program, comprising:

• a modeling means for modeling solid models of said workpiece and said nozzle to be used for machining with laser beam in a three-dimensional virtual space;
• said modeling means having a chip model producing means for modeling a chip model at an edge of said solid model of said nozzle produced in said three-dimensional virtual space through a predetermined space;
• a simulation execution means for controlling to move said solid model of said nozzle with respect to said solid model of said workpiece together with said chip model in said three-dimensional virtual space according to an instruction of said laser beam machining program;
• and
• a trace machining propriety judging means for watching a state of an interference between said chip model and said solid model of said workpiece, and outputting a predetermined signal when said state of said interference being released.