| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide the laser marking device with a high processing accuracy by reducing a processing error attributable to the change in dimension to be accompanied with a temperature of the workpiece by raised temperatures of the room and the processing work. SOLUTION: The device is equipped with a thermometer 24a to measure the temperatures of the workpiece 1 and the processing-finished work 10, a CCD camera 26 to measure a processed measurement of the processing-finished work 10, and a signal processor 27. When a thermal expansion factor of the workpiece 1 is accurately known, the processing position to the workpiece 1 is compensated based on the temperature of the workpiece 1 and the known thermal expansion factor. When the thermal expansion factor of the workpiece 1 is not known or not so accurate and, in the case that a more accurate compensation is required, the thermal expansion factor of the material is assumed based on the data of the temperature of the processing-finished work 10 and its measurement, and the temperature of the processing-finished work 10 and its processing position, when it is being processed and then, the processing position is compensated accordingly.</p> |
