| 摘要 |
PURPOSE: A system and a method for preventing tool breakage of a CNC hobbing machine are provided to prevent damage to the hob cutter and the cutting tool resulting from trouble or emergency stop occurring in gear cutting. CONSTITUTION: A system for preventing tool breakage of a CNC hobbing machine comprises a motor monitoring unit(110) which monitors the temperature and load of a motor for driving each axis of the CNC hobbing machine, a axis monitoring unit(120) which monitors speed and synchronization error information of the axis, a machine tool monitoring unit(130) which monitors the operation state of each machine tool, a trouble determining unit(140) which determines whether trouble occurs in the CNC hobbing machine based on the monitoring result from the monitoring units, an external input information monitoring unit(150) which monitors externally input commands and informs a control unit of emergency stop commands, and the control unit(160) which moves back an X axis, set as a withdrawal axis, in the event of emergency stop command or trouble, and stops a C axis, set as a synchronization axis, and the operation of the CNC hobbing machine when Z, B, Y, and A axes synchronized with the C axis are all stopped.
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