US 2002/0162876 A1Published application

Friction stir welding method using members which overlap and have protrusion at the weld location prior to the welding

AssigneeHitachi, Ltd.

InventorsKinya Aota, Masakuni Ezumi, Yasuo Ishimaru, Hisanori Okamura, Isao Funyuu, Akihiro Satou

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Abstract

Disclosed is a friction stir welding technique which avoids occurrence of a dent, in adjoining region, extending to a level beneath the joined surfaces, structural body formed. At end portions of the frame members to be joined, at the joining region, thickened parts which project toward the rotary body joining tool are provided. The rotary body joining tool has a small-diameter tip portion and a larger diameter portion. The rotary body joining tool is inserted in the thickened parts. In a state where the rotary body joining tool has been inserted small-diameter tip end first, to a level where the larger diameter portion of the rotary body joining tool overlaps the thickened part but does not extend below the upper surface of the non-thickened surfaces of the members joined, the rotary body is rotated and moved along the joining region.

Claims4

Dependent claims

A friction stir welding method, comprising:

abutting an end portion of a first extruded frame member and an end portion of a second extruded frame member, to provide an abutted portion;
at an end portion of a width direction of said first extruded frame member when said first extruded frame member is viewed from said extruded direction, providing a protrusion portion which protrudes in a thickness direction of said first extruded frame member, wherein, in said abutting, said end portion of said second extruded frame member is abutted to said end portion of a width direction of said first extruded frame member, and wherein, in said protrusion portion, a protrusion chip extends toward a side of said second extruded frame member from an apex of said protrusion portion and overlaps said end portion of said second extruded frame member;
and
in a condition in which a rotary tool is inserted into said protrusion portion and said abutted portion from a side of said protrusion portion, rotating said rotary tool, and moving relatively said rotary tool along to said abutted portion, to perform said friction stir welding.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 10/187,898Filed 3 Jul 2002
Priority: JP 9-19675923 Jul 1997
Published: 7 Nov 2002
Term ends: Not estimatedThe source records don’t support an estimate.

Classification22 codes

B23K 20/122
The heat being generated by friction; Friction welding: using a non-consumable tool, e.g. friction stir welding
B23K 20/126
Characterised by the apparatus: workpiece support, i.e. backing or clamping
B23K 33/00
Soldering or unsoldering: specially-profiled edge portions of workpieces for making soldering or
B23K 37/08
Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass: for flash removal

Family

Application09/025,070Division · filed 17 Feb 1998
Application09/546,563Division · filed 11 Apr 2000
Application09/828,838Continuation · filed 10 Apr 2001
Application09/828,838Division · filed 10 Apr 2001
Application10/187,898Continuation · filed 3 Jul 2002
US 2001/0011673 A1Published application
US 6,050,474 ARelated patent
US 6,237,829 B1Related patent
US 6,419,144 B2Related patent
US 6,619,534 B2Related patent
US 2002/0162876 A1This patent

From the US filing history. Foreign family members aren’t listed.