Abstract: A friction stir spot welding method includes a welding step of performing friction stir spot welding of a workpiece by using a pin member and a shoulder member while the workpiece is supported and pressed by the end face of a clamp member and a pressing step of causing a friction stir spot welding device to press an obverse surface and a reverse surface of at least one of a friction-stirred region of the workpiece and an adjacent region adjacent to the friction-stirred region of the workpiece from a rotary tool side and an opposite side after the welding step while the pin member and the shoulder member are accommodated in an accommodation space of the clamp member.

Abstract: In a double-acting friction stir spot welding device or a double-acting friction stir spot welding method, a pin member and a cylindrical shoulder member that rotates around the axis of the pin member are used as rotary tools, and a clamp member that has a cylindrical shape positioned so as to surround the outside of the shoulder member and is configured to press a workpiece from an obverse surface with an annular pressing surface of the distal end is used as a holding jig. The clamp member has an inclined surface that is adjacent to the inner edge portion of the pressing surface and inclined so as to reduce the inner diameter of the clamp member toward the back side as viewed from the pressing surface.

Abstract: In a double-acting friction stir spot welding device or a double-acting friction stir spot welding method, a pin member and a cylindrical shoulder member that rotates around the axis of the pin member are used as rotary tools, and a clamp member that has a cylindrical shape positioned so as to surround the outside of the shoulder member and is configured to press a workpiece from an obverse surface with an annular pressing surface of the distal end is used as a holding jig. The clamp member has an inclined surface that is adjacent to the inner edge portion of the pressing surface and inclined so as to reduce the inner diameter of the clamp member toward the back side as viewed from the pressing surface.

Abstract: A clamp member, for a double-acting friction stir spot welding device, is provided for the double-acting friction stir spot welding device to perform friction stir spot welding of a workpiece by using a rotary tool, and presses a surface of the workpiece while the workpiece is supported. The rotary tool has a pin member and a shoulder member. The clamp member includes an end face that comes into surface contact with the surface of the workpiece to press the surface and a protruding portion protruding from the end face in an axial direction and extending around an axis. The protruding portion is configured to press the workpiece, the clamp member surrounding an outer periphery of the shoulder member.

Abstract: A friction stir spot welding method includes a welding step of forming a build-up portion on a workpiece by friction-stirring the workpiece, using a pin and a shoulder, while pressing a surface of the workpiece with an end face of a clamp, and filling a portion of the workpiece being softened in a chamber portion of the clamp by press-fitting at least one of the pin and the shoulder into a plastic flow portion of the workpiece. and the friction stir spot welding method further includes a pressing step of pressing a surface of at least one of a region of the build-up portion, which is frictionally stirred by the shoulder, and an adjacent region of the build-up portion against the end face of the clamp with the pin and the shoulder retracted into an accommodation space.

Abstract: A friction stir spot welding method includes a welding step of performing friction stir spot welding of a workpiece by using a pin member and a shoulder member while the workpiece is supported and pressed by the end face of a clamp member and a pressing step of causing a friction stir spot welding device to press an obverse surface and a reverse surface of at least one of a friction-stirred region of the workpiece and an adjacent region adjacent to the friction-stirred region of the workpiece from a rotary tool side and an opposite side after the welding step while the pin member and the shoulder member are accommodated in an accommodation space of the clamp member.

Abstract: A friction stir spot welding method includes a welding step of forming a build-up portion on a workpiece by friction-stirring the workpiece, using a pin and a shoulder, while pressing a surface of the workpiece with an end face of a clamp, and filling a portion of the workpiece being softened in a chamber portion of the clamp by press-fitting at least one of the pin and the shoulder into a plastic flow portion of the workpiece. and the friction stir spot welding method further includes a pressing step of pressing a surface of at least one of a region of the build-up portion, which is frictionally stirred by the shoulder, and an adjacent region of the build-up portion against the end face of the clamp with the pin and the shoulder retracted into an accommodation space.

Abstract: In a double-acting friction stir spot welding device or a double-acting friction stir spot welding method, a pin member and a cylindrical shoulder member that rotates around the axis of the pin member are used as rotary tools, and a clamp member that has a cylindrical shape positioned so as to surround the outside of the shoulder member and is configured to press a workpiece from an obverse surface with an annular pressing surface of the distal end is used as a holding jig. The clamp member has an inclined surface that is adjacent to the inner edge portion of the pressing surface and inclined so as to reduce the inner diameter of the clamp member toward the back side as viewed from the pressing surface.

Abstract: A clamp member, for a double-acting friction stir spot welding device, is provided for the double-acting friction stir spot welding device to perform friction stir spot welding of a workpiece by using a rotary tool, and presses a surface of the workpiece while the workpiece is supported. The rotary tool has a pin member and a shoulder member. The clamp member includes an end face that comes into surface contact with the surface of the workpiece to press the surface and a protruding portion protruding from the end face in an axial direction and extending around an axis. The protruding portion is configured to press the workpiece, the clamp member surrounding an outer periphery of the shoulder member.

Abstract: A method of manufacturing a formed component for aircraft use according to the present invention includes: subjecting a material made of an aluminum alloy to solution heat treatment; then forming the material into a predetermined shape under cold working conditions; and thereafter subjecting the material to artificial age-hardening treatment. Under the cold working, the material is formed into the predetermined shape while a strain corresponding to a temper T8 is being imparted to the material by a roll forming apparatus. This makes it possible to manufacture a formed component for aircraft use made of an aluminum alloy in a T8 state at a lower cost than conventional art.

Abstract: A functional relation between components which can be extracted from an already existing program in advance is automatically extracted by a computer, or such a functional relation which cannot be extracted is defined by a developer, so that the preparation of a program by combining the components is assisted. A dictionary registration unit reads a source code file, analyzes, extracts a component definition, and extracts from the component definition information a counterpart component name, interface name, and interface definition, and registers component name, counterpart component name, interface information of the interface name, and interface definition body in a dictionary. Furthermore, when there is no source codes, the developer inputs the interface information from an input-output device, and registers in the dictionary.