Electric heating – Metal heating – By arc
Reexamination Certificate
2007-03-22
2011-10-04
Yuen, Henry (Department: 3742)
Electric heating
Metal heating
By arc
C219S121600, C219S121670, C219S121780, C219S121820, C219S121730, C219S121640, C348S144000, C359S641000, C359S822000, C359S823000, C359S824000, C385S079000, C385S134000, C385S060000, C385S074000, C385S075000
Reexamination Certificate
active
08030593
ABSTRACT:
A laser welding apparatus and method for easily adjusting a laser focusing position according to a distance from a laser irradiating device to a laser irradiating point on a work piece, or a welding point. A post-collimation laser diameter is measured when the laser emitting end has an optimal laser diameter on the work piece with respect to the distance from the laser processing head to the work piece. Corresponding data is stored with the above distance and the post-collimation laser diameter corresponding to each other. During welding, a diameter of the laser beam passing through a collimate lens is measured by a laser diameter measuring device. The post-collimation laser diameter is adjusted to be an optimal value according to the corresponding data.
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Drinker Biddle & Reath LLP
Nissan Motor Co,. Ltd.
Spurlock Brett
Yuen Henry
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