The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 2014
Filed:
Feb. 07, 2006
Hitoshi Kawai, Atsugi, JP;
Yuji Hamaguchi, Isehara, JP;
Tatsuya Sakurai, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Showa Optronics Co., Ltd., Tokyo, JP;
Abstract
A laser welding apparatus includes a laser welding unit including a first lens adapted to focus a laser beam; a second lens adapted to diffuse the laser beam to the first lens; and a third lens adapted to guide the laser beam to the second lens. The relative positions of the first lens, the second lens, and the third lens, are adjusted to adjust a diffusion angle and a beam width of the laser beam entering the first lens. The laser welding apparatus performs: actuating the laser welding unit to travel at a predetermined speed along a predetermined trajectory; directing the laser beam at a first welding spot; adjusting the focal length to focus the laser beam at the first welding spot; holding the laser focal spot size substantially constant; and directing the laser beam at a second welding spot after completion of welding for the first welding spot.