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:
Oct. 05, 1993
Filed:
Sep. 02, 1992
Eiji Nishi, Toyota, JP;
Taminori Yanagisawa, Toyota, JP;
Toshiyuki Takasago, Toyota, JP;
Kouichi Arima, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
Metal sheets having different thicknesses are abutted to define an abutment line and then are laser-welded. During laser welding, the laser beam is directed to a line (a weld line) which is apart from the abutment line on a thicker sheet side. The distance between the abutment line and the weld line is preferably in the range of 0.1 mm to 0.4 mm. Preferably, the laser beam weaves from side to side with respect to the weld line. As a result, a sharp edge is removed from the thicker sheet and a smooth transient surface is formed on the weld bead. The resulting one-piece sheet can be used as a press material without any pre-pressing processing, such as grinding.