| 摘要 |
<p>PURPOSE:To obviate a large installation space and enable the maintenance of tool setting freedom by providing the predetermined part of a cutting tool with a laser unit for measuring a distance to a workpiece and tool fracture judgement and warning means. CONSTITUTION:When the retreat of a spindle head 12 is detected after the completion of a boring process, CPU 31 indexes a laser distance measurement unit 2 to a position corresponding to a cutting tool 16, and a laser beam oscillated with a laser oscillator is applied to the tip part of a cutting tool 16. In this case, the laser beam is reflected upon a position slightly behind the tip of the tool 16. Thereafter, the laser distance measurement unit 2 oscillates on the operation of stepping motors 27 and 28, and the laser beam is shifted by the predetermined distance toward the tip of the tool 16. And when there is damage on the tip of the tool 16, a distance between the tool 16 and the unit 2 becomes different from the case wherein there is no damage. Consequently, a signal in both cases is different to a certain extent and when the damage is judged to be existing, a damage signal is outputted to a warning light 4. This warning light 4 thereby goes on and gives a warning.</p> |
