Patent ID: 6640515
Filing Date: 2003-11-04
Classification: B23K,B23Q,Y10T

Abstract:
An extruded frame member adapted to be welded by friction stir welding, having two plates and a plate member connecting said two plates, the two plates respectively having ends, the ends of the two plates being in substantially a same plane, whereinat least one end portion, extending from said ends in a width direction, of at least one of said two plates, has a raised portion which projects to an outer side in a thickness direction of said extruded frame member, said raised portion being where said friction stir welding is carried out, wherein said at least one end portion, including said raised portion, is adapted to be friction stir welded; and said raised portion includes a first part that extends above said end portion and a second part that extends in a direction substantially in parallel with said at least one end portion and beyond the respective end of said at least one of said two plates, the second part being formed continuously with the first part, only said raised part, of the extruded frame member, extending beyond the ends, wherein end portions of each of the two plates have a respective raised portion which projects to an outer side in a thickness direction of said extruded frame member, each raised portion having a first part that extends above said end portion and a second part extending in a direction substantially in parallel with a respective end portion and beyond the respective end, and being formed continuously with the first part.