| 摘要 |
PURPOSE:To detect the temperature of a working point of a material to be worked and to detect a working abnormality. CONSTITUTION:When the material to be worked such as a steel plate is cut by laser beam and the temperature of a working point CP raises abnormally, working abnormality is generated. Therefore, a temperature sensor 12 to detect the temperature of the working point CP is fitted to the working head 5. A filter 12a to cut and filtrate the reflective beam of the laser beam is mounted on a temperature sensor 12, only infrared rays generated from the material 8 to be worked are detected and the temperature of the working point is detected more accurately. When the working abnormality is detected, the working is stopped. The temperature of the working point is always monitored to detect the working abnormality. |
