WELDED STRUCTURE WITH AT LEAST THREE LASER WELDED NUGGETS ARRANGED ALONG A VIRTUAL CLOSED CURVE, AND CORRESPONDING LASER WELDING METHOD

摘要

A welded portion (1) formed at a joint between a plurality of steel plates (10) is formed of a plurality of nuggets (11) arranged along a virtual closed curve (12), and when the thickness of the thinnest steel plate (10) of the steel plates (10) is denoted by t, the diameter d of each nugget (11) is 3 Vt or less, and the pitch p between adjacent nuggets is 2d or more but no more than 5d, and the number of nuggets is three or more.