| 摘要 |
A laser welding device, which welds a lid (320) to an opening portion of a case (310) using a laser, radiates laser light at a part to be welded, including an inner side surface of the case, said inner side surface defining the opening portion, and an outer peripheral surface of the lid, said outer peripheral surface opposing the inner side surface of the case. The inner side surface of the case (310) and the outer peripheral surface of the lid (320) are disposed in such a way that a groove portion (330) is formed therebetween, and are formed including inclined surfaces which are capable of sliding over one another and which function as a sliding portion, in such a way that the width of the groove portion (330) can be varied by causing the sliding portion to slide. By providing a detecting unit (270) which detects the width of the groove portion (330); adjustment force applying units (510, 520) which apply to the case (310) and/or the lid (320), by way of the sliding portion, a force which adjusts the width of the groove portion (330); and a control unit (500) which controls the force applied by the adjustment force applying unit, in accordance with the groove width detected by the detecting unit (270), the effects of the relative positions of the pair of members to be welded, and the effects of differences between individual units, can be suppressed, and the strength distribution of the laser light radiated at the part being welded can be set more appropriately. |
