| 摘要 |
PURPOSE:To weld lugs correctly at predetermined positions in the process to fix the lugs to a tension band or a heat-shrunk band fitted around the sides of a panel of a cathode ray tube, by non-contact heating with a laser beam or the like. CONSTITUTION:The tension band 12 is fitted around the sides of the cathode ray tube panel 11, and then, a lug 13 is fixed by laser welding to the band at the position corresponding to each of four corners of the panel, after being correctly positioned by means of a jig. Namely, the lag 13 is provided with a hole 14 at the position where it is welded to the band 12, and the welding is performed by applying laser beams at the circumferential edge of the hole 14 and the side edge 15 of the lug. By welding in this way, input of the laser beam is limited to a small local portion and the welding is performed without making contact with the members to be welded, the lug can be securely welded to the band and no damage is caused on the panel. Since the lugs can thus be fixed to the correct positions, there is no annoyance to be caused when the cathode ray tube is mounted on the cabinet or the like. |
