Vibration information display device for machine tool that acquires information only during time that vibration value and rate of change exceed respective threshold

A vibration information display device for a machine tool in which a tool or workpiece is rotated to process the workpiece, the vibration information display device being disposed in the machine tool having a vibration detection configured to detect chatter vibrations occurring during processing, the vibration information display device comprising:

• a monitor configured to display information on the chatter vibrations;
• a vibration information acquisition unit configured to acquire vibration information only during time that a vibration value exceeds a vibration threshold and a rate of change of vibration exceeds a set value;
• an operating information acquisition unit configured to acquire operating information of the machine tool only during time that said vibration value exceeds said vibration threshold and said rate of change of vibration exceeds said set value;
• a storage unit storing vibration values acquired during time that said vibration value exceeds said vibration threshold and said rate of change of vibration exceeds said set value, and said storage unit storing operating information acquired during time that said vibration value exceeds said vibration threshold and said rate of change of vibration exceeds said set value;
• and
• a display control unit configured to display on the monitor vibration information acquired during time that said vibration value exceeds said vibration threshold and said rate of change of vibration exceeds said set value, and operating information acquired during time that said vibration value exceeds said vibration threshold and said rate of change of vibration exceeds said set value, alternatively, the display control unit being configured to display on the monitor vibration information acquired during time that said vibration value exceeds said vibration threshold and said rate of change of vibration exceeds said set value together with trajectory information of a blade edge of the tool included in operating information acquired during time that said vibration value exceeds said vibration threshold and said rate of change of vibration exceeds said set value.