| 摘要 |
PURPOSE:To prevent burning and defect of welding on surface of a work by detecting surface temp. of the work near the welding part and controlling laser beam optical axis and laser beam output so that the detected temp. comes in the allowable temp. range. CONSTITUTION:At the time of executing the laser beam welding, the surface temp. of the work near the welding part is detected with a temp. sensor arranged at a laser beam machining head 17. The detected actual temp. is controlled so as to come in the preset allowable temp. range. By this control, the laser beam optical axis is almost made to agree with welding line in the welding part, and also the laser beam welding is executed to the welding part in the work with the optimum laser beam output. By this method, the laser beam output can be kept to the optimum condition. |
