Laser welding method for preparation of electron gun of color ca

Details Laser welding method for preparation of electron gun of color ca Laser welding method for preparation of electron gun of color ca

1992-12-21

1994-04-05

Bradley, Paula A.

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

228251, 21912164, 445 34, H01J 902, B23K 2602

Patent

active

052999653

ABSTRACT:
A laser welding method for preparation of an electron gun of a color cathode-ray tub. This laser welding comprises the steps of forming a coining part on an evaporation section of a weld zone of an upper part to be welded to a lower part, and focusing a laser beam on a bottom surface of the coining part. This coining part has a diameter larger than a diameter of the evaporation section and is formed in such a manner that it permits the weld zone of the upper part to have a predetermined thickness. In accordance with this laser welding, a weld nugget formed at the juncture between the upper and lower parts by is enlarged in its diameter and, as a result, increases the weld strength between the upper and lower parts. The coining part has a bottom surface of a plane surface or a curved surface. This laser welding can weld all of the parts of the electron gun even when an upper part to be welded to a lower part is thicker than the lower part and permit the welding condition to be easily determined.

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