Method for manufacturing spark plug and apparatus for...

Details Method for manufacturing spark plug and apparatus for... Method for manufacturing spark plug and apparatus for...

2006-08-01

2006-08-01

Santiago, Mariceli (Department: 2879)

Electric lamp or space discharge component or device manufacturi

Process

Spark plug or spark gap making

C219S121630, C219S121640, C219S121600

Reexamination Certificate

active

07083488

ABSTRACT:
A method and apparatus for manufacturing a spark plug which avoids depth insufficiency of the weld metal portion or thickness insufficiency of the spark portion and which thus enhances the weld strength and service life of the spark portion. According to the method, a noble metal chip is attached to a chip joint face formed on a distal end of a center electrode of a spark plug workpiece, along the direction of the longitudinal axis of the workpiece, so as to form a chip-attached assembly. The chip-attached assembly is irradiated with a laser beam LB so as to form a laser-beam weld metal portion intruding into the noble metal chip and into the chip joint face, thereby forming a noble-metal spark portion having a discharge face. The position of the chip joint face of the center electrode as viewed along the direction of the longitudinal axis is detected, and on the basis of the detected position, the position of irradiation with the laser beam on the chip-attached assembly along the direction of the longitudinal axis is adjusted.

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patent: 2001-015245 (2001-01-01), None

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