Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Naoki Fukai0
Junya Tanabe0
Keiji Otsuka0
Koji Oda0
Jun Kitagawa0
Date of Patent
June 10, 2008
0Patent Application Number
104753200
Date Filed
April 24, 2002
0Patent Primary Examiner
Patent abstract
While steel sheets are positioned and held by a holding mechanism, a first laser beam is applied to a heating region of the steel sheet to space the steel sheet from the other steel sheet by a predetermined distance. A second laser beam is applied to a welding region to weld the steel sheets. An amount of heat applied by the first laser beam, a moving speed of the first laser beam, and a focused spot diameter of the first laser beam are set to keep the sheet irradiated with the first laser beam in an unmelted state and plastically deform the sheet.
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