Constructive body and friction stir welding method

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United States of America Patent

PATENT NO 6193137
SERIAL NO

09121092

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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In a case where a welding of a member is performed through a friction stir welding, to restrain the generation of a clearance in a portion to be joined by the welding and to provide a joint having a good joining portion, abutting faces of members are formed with slanting surfaces. A friction stir welding is carried out from an upper portion. The welding is carried out with the slanting surfaces resisting the forces produced in forming the welding bead. Since the slanting surfaces are provided, a flow-out of the material in the welding bead can be restrained, and further a bending of the joining portion can be restrained. Further, a tab is arranged at a beginning end and a finish end of the welding and then the welding is carried out starting at one tab and ending at the other tab.

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Patent Owner(s)

Patent OwnerAddress
HITACHI LTD6-6 MARUNOUCHI 1-CHOME CHIYODA-KU TOKYO 1008280

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Aota, Kinya Hitachi, JP 85 1160
Ezumi, Masakuni Kudamatsu, JP 74 1383
Ishimaru, Yasuo Kudamatsu, JP 48 789
Kawasaki, Takeshi Kudamatsu, JP 125 1742

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