US 6,494,011 B2 · Hollow extruded frame member for friction stir welding

Abstract

End portions of face plates 111 and 112 of a frame member 110 are connected by a rib 116A. To protrusion chips 117b1 and 117b2 end portions of face plates 101 and 102 of another frame member 100 are overlapped. The corners between the rib 116A and the rear faces of the face plates 111 and 112 are in the form of a convex circular arc 131 which protrudes into a hollow portion 119 of the frame member 110. Both end portions of the circular arc 131b1 are connected to the rib 116A and the face plates 111 and 112 by two smooth recessed circular arcs 132b1 and 133b1. Accordingly, since a flow-out of metal does not occur from this portion, the cross-section can be small and a light weight structure can be obtained. A structural body formed of hollow frame members which are joined by friction stir welding provides a light weight structure.

Claims28

Dependent claims

A hollow extruded frame member capable of being welded by friction stir welding, having two substantially parallel face plates and plural ribs connecting said two substantially parallel face plates, wherein:

a connection portion is provided between a rib, of said plural ribs, at one end portion of said hollow extruded frame member and one of said substantially parallel face plates, said connection portion being a portion in which the friction stir welding is carried out;
in said connection portion between said rib and said one of said two substantially parallel face plates, a connection line, between said rib and said one of said substantially parallel face plates, facing the other of the two substantially parallel face plates, is in a form of a circular arc which protrudes into a side of said hollow portion;
and
at said one of said two substantially parallel face plates, a protrusion chip protruding from said rib at said one end portion is provided, said protrusion chip extending beyond said one of said substantially parallel face plates.

1 more element

a connection portion is provided between a rib, of said plural ribs, at one end portion of said hollow extruded frame member and one of said substantially parallel face plates, said connection portion being a portion in which the friction stir welding is carried out;
in a side of the other of said two substantially parallel face plates, a protrusion chip protection chip, a thickness of the tip end becomes thin going toward the end of the tip end;
and
in said connection portion between said rib and said one of said two substantially parallel face plates, a connection line, between said rib and said one of said substantially parallel face plates, facing the other of the two substantially parallel face plates, is in a form of a circular arc which protrudes into a side of said hollow portion;
and wherein:
another connection portion is provided between said rib at said one end portion and the other of the two substantially parallel face plates, said another connection portion being another portion in which the friction stir welding is carried out;
and
a connection line of said another connection portion, between said rib and the other of said two substantially parallel face plates, facing the hollow portion between the two substantially parallel face plates, is in a form of a circular arc which protrudes into a side of said hollow portion.

5 more elements

Dependencies are inferred from the claim text.

Hollow extruded frame member for friction stir welding

Life of this patent

Hollow extruded frame member for friction stir welding

Life of this patent

Abstract

Claims28