The present invention includes: a preparation step in which a stepped portion including step bottom and step side surfaces is formed along an inner circumferential edge of a jacket body; a placing step in which a sealing body is placed on the jacket body forming first and second butted sections; and a main joining step in which friction stir welding is performed by moving a rotary tool along the first butted section, while only a stirring pin of the rotary tool is in contact with only the sealing body. During friction stir welding, a central axis of rotation of the rotary tool is tilted towards a central side of the jacket body so that the angle of tilt with respect to the step side surface is equal to the angle of inclination of an outer circumferential surface of the stirring pin with respect to the central axis of rotation.

To provide a pellicle frame for FPD (flat Panel display), which can maintain the rigidity required for a pellicle for a large FPD (flat Panel display) even if the cross-sectional area of the frame is reduced and can enlarge the inner dimensions of the frame by reducing the cross-sectional area, and has high dimensional accuracy and flatness, and an efficient manufacturing method thereof. The present invention provides a pellicle frame for FPD (flat panel display) composed of an extruded material of an aluminum alloy powder sintered body containing Si: 20 to 40% by mass, Mg: 0.2 to 1.2% by mass, Cu: 2% by mass or less, Fe: 2% by mass or less, Cr: 0.4% by mass or less, the balance being Al and unavoidable impurities to provide.

An additive manufacturing system for depositing an extrudate onto a substrate comprises a deposition head. The deposition head comprises a stirring tool, rotatable about an axis of rotation AR and comprising a tool distal end and a tool proximal end, axially opposing the tool distal end along the axis of rotation AR. The stirring tool defines a bore, extending from the tool proximal end to the tool distal end. The bore is configured to receive feedstock, biased toward the tool distal end. The deposition head also comprises a die, which is positioned adjacent to the stirring tool, defines a die axis AD1, and comprises a die distal end and a die proximal end, axially opposing the die distal end along the die axis AD1. The die axis AD1 is parallel with the axis of rotation AR of the stirring tool.

A drive shaft includes a first annular wall and a second annular wall joined together via a friction-welded portion. The first annular wall and the second annular wall have outer diameters of 30 to 50 mm and wall thicknesses of 3 to 5 mm. A burr created at the friction-welded portion has a connection radius of greater than or equal to 0.5 mm, a base radius of greater than or equal to 0.5 mm, a burr base angle of less than or equal to 40°, and a burr slope length of 0.2 to 5 mm.

A method for manufacturing a hydraulic housing for a braking system of a motor vehicle. A cylindrical or hollow-cylindrical first housing part and a second housing part of the hydraulic housing are integrally joined using friction welding. The method includes: a) attaching the first housing part to the second housing part, an end face of the first housing part being attached to the second housing part so that a shared contact area is created, b) plasticizing the two housing parts in the contact area and/or in a joint area adjoining the contact area by friction-based heat introduction, and c) compressing at least one housing part and/or pressing a friction welding tool against the housing parts so that material forming and/or material shearing is effectuated in the plasticized area of the two housing parts and both housing parts form an integral joint in the contact area and/or in the joint area.

A first metal member (1) and a second metal member (2) are joined together using a rotary tool (F1D) comprising a base side pin (F3) and a tip side pin (F4), comprising an overlapping and abutting process of forming an overlapped portion (J1a), a top side abutted portion (J1b) and a back side abutted portion (J1c), and a friction stirring process of inserting the tip side pin (F4) that is rotating into the top side abutted portion (J1b) to join the top side abutted portion (J1b) and the overlapped portion (J1a) with a flat face (F5) vertical to a rotation axis of the rotary tool (F1D) being in contact with both the first metal member (1) and the second metal member (2) and with a tip face (f7) of a protruding portion (F6) protruding from the flat face (F5) being inserted deep over the overlapped portion (J1a).

Provided is a method for manufacturing a liquid-cooled jacket, to reduce the size of a recessed groove on a surface of a metal member and also to reduce roughness of an abutted surface. The method includes: a placing step of placing a jacket body and a sealing body, a first main joining step of performing friction stirring by moving a main joining rotary tool around along a first abutted portion, and a second main joining step of performing friction stirring by moving the main joining rotary tool around along a second abutted portion. The main joining rotary tool has a base-end-side pin and a tip-end-side pin. A taper angle of the base-end-side pin is grater than a taper angle of the tip-end-side pin and a stairs-like pin step portion is formed on an outer circumferential surface of the tip-end-side pin.

The method comprises a primary joining process in which primary joining is performed by friction stirring by moving a rotary tool (F) once around a recessed part (13) along a first overlap part (H1) in a state where only a stirring pin (F2) of the rotary tool provided with the stirring pin is inserted in the first overlap part (H1) from a front surface (3b) of a sealing body (3) and is in contact with a jacket body (2) and the sealing body (3). In the primary joining process, the rotary tool (F), which is provided with a flat surface (F4) orthogonal to a rotational axis of the stirring pin (F2) and a projection (F5) projecting from the flat surface (F4) at a tip part of the stirring pin (F2), is employed, and the first overlap part (H1) is joined by bringing the flat surface (F4) into contact with only the sealing body (3) and inserting a tip end of the projection (F5) more deeply than the first overlap part (H1).

The present invention includes: a preparation process configured to provide a first metal member including an end portion with a vertical face, and a second metal member including an end portion with an inclined face, a higher melting point and a smaller plate thickness than the first metal member; a butting process configured to butt the end portions of the first metal member and the second metal member against each other and form a butted portion with a V-shaped gap; and a joining process configured to join the first metal member and the second metal member together by inserting the rotating rotary tool from only a front face of the first metal member and relatively moving the rotary tool along the butted portion while only the stirring pin is in contact with at least the first metal member.

A method for welding at least one hanger to a fork. A friction welding process may be used to create a weld between the hanger and the fork, after which the heat-affected zone (HAZ) may be allowed to cool. Preferably the cooling occurs until martensite is formed, after which a post-tempering current is applied to the HAZ.