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OwnerKinya Aota, Masahisa Inagaki +2inventors
InventorsKinya Aota, Masahisa Inagaki, Satoshi Hirano, Kazutaka Okamoto
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A friction stirring-welding method capable of increasing the welding strength of a lap joint. A welding tool (1) comprises a small diameter projected part (2) at the tip of a shoulder (3). The welding tool is press-fitted to the upper plate (4) of the lap joint while being rotated. By a friction stirring action, an upper plate side welding boundary surface (6) plastically flows, a surface oxidation film on a lapped surface is peeled off, and the boundary surface is activated to provide an excellent welding part. Also, since the welding tool is formed in a shape having the small diameter semispherical projected part (2) at the tip thereof, the thickness (12) of an upper plate welding part is increased, and a lap joint part with high welding strength can be provided.
A friction stir welding method for a lap joint, in which a plurality of members are lapped and a welding tool is pressed into one of the members, while being rotated, to cause friction stir to achieve welding, characterized in that the method comprises using, as the welding tool, a welding tool having a small diameter projected part at a tip end of a shoulder, and pressing the projected part and the shoulder of the welding tool into one of the members.
A friction stir welding method for a lap joint, in which a plurality of members are lapped and a welding tool is pressed into one of the members, while being rotated, to cause friction stir to achieve welding, characterized in that a tip end of the welding tool is semispherical in shape.
A friction stir welding method for a lap joint, in which a plurality of members are lapped and a welding tool is pressed into one of the members, while being rotated, to cause friction stir to achieve welding, characterized in that a tip end of the welding tool is flat and an outer peripheral surface thereof is rounded.
A friction stir welding apparatus that rotates a welding tool to cause friction stir to weld a plurality of members, characterized in that a tip end surface of the welding tool defines a convex-shaped and curved surface.
A friction stir welding apparatus that rotates a welding tool to cause friction stir to weld a plurality of members, characterized in that the welding tool comprises, at a central portion of a tip end thereof, a projected part having a smaller diameter than that of the welding tool and a tip end of the projected part defines a curved surface.
A friction stir welding apparatus that rotates a welding tool to cause friction stir to weld a plurality of members, characterized in that the welding tool comprises, at a central portion of a tip end thereof, a projected part and a recess is formed around the projected part.
A friction stir welding apparatus that rotates a welding tool to cause friction stir to weld a plurality of members, characterized in that the welding tool comprises a tip end shaped to be trapezoidal in cross section transverse to an axial direction thereof.
Dependencies are inferred from the claim text.