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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.:

US 9873168 B1

PDFFull Text
Date of Patent:
Jan. 23, 2018

Filed:

Dec. 09, 2011

Method of laser welding

Applicants:

Mun-yong Lee, Busan, KR;

Mun-jong Song, Busan, KR;

Inventors:

Mun-Yong Lee, Busan, KR;

Mun-Jong Song, Busan, KR;

Assignee:

SUNGWOO HITECH CO., LTD., Pusan, KR;

Attorney:

Alston & Bird LLP

Primary Examiner:

David Angwin

Assistant Examiner:

Jimmy Chou

Int. Cl.
CPC ...
B23K 26/20 (2014.01); B23K 26/08 (2014.01); B23K 26/244 (2014.01); B23K 103/04 (2006.01); B23K 101/34 (2006.01); B23K 103/08 (2006.01);
U.S. Cl.
CPC ...
B23K 26/0884 (2013.01); B23K 26/244 (2015.10); B23K 2201/34 (2013.01); B23K 2203/04 (2013.01); B23K 2203/08 (2013.01);
Abstract

A method of laser welding where two steel sheets are welded by a laser beam after the two steel sheets are overlapped with a predetermined gap is disclosed. The method includes: a stitch welding step where a laser beam of focal region is irradiated along a welding portion of the upper steel sheet and the lower steel sheet such that a molten slot is formed at the upper steel sheet along the welding portion and an heat expansion portion is formed at the lower steel sheet along the welding portion by thermal conduction; and a pattern welding step where the laser beam of focal region is irradiated along the welding portion with a predetermined pattern such that an edge of the molten slot formed at the upper steel sheet is melted together with the heat expansion portion of the lower steel sheet so as to form a molten pool.

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Lee, Mun-Yong. (2018). Method of laser welding (U.S. Patent No. 9873168). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9873168

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