A friction head and a friction additive manufacturing method of adjusting components and synchronously feeding material are provided. The friction head includes a friction body, a charging part and a feeding part. An axis of the friction body, an axis of the charging part and an axis of the feeding part are coincided with one another. The charging part and the feeding part are sleeved on the friction body. Spiral groove(s) extending in a same direction is formed in an inner ring wall of the feeding part. The spiral groove(s) extends through the inner ring wall of the feeding part and is symmetrical about the axis of the feeding part. The spiral groove(s) and a lower outer surface of the feeding part form spiral feeding channel(s). An upper end of each feeding channel is communicated with a corresponding one of feeding hole(s).

Disclosed are tools for friction stir processing and methods of using the same. Also disclosed herein are methods of repairing surface defects using the disclosed friction stir processing tools.

A friction stir spot welding apparatus includes a pin member, a shoulder member, a rotation driver, a forward/backward movement driver, and a controller. The controller controls the forward/backward movement driver, such that the pin member and/or the shoulder member press workpieces before a clamp member presses the workpieces, and then controls the rotation driver and the forward/backward movement driver, such that the pin member and the shoulder member stir the workpieces.

A friction stir welding device and a friction stir welding method provide that an additional material is introduced into the gap between a rotating pin and a fixed shoulder. The pin and/or the shoulder includes a conveyor worm structure by which the additional material is transported to the workpiece.

In a general aspect, a method includes filling at least a portion of a cavity of a component with an additive material, and mixing, using a friction stir tool, a material of the component with the additive material. The additive material may be a liquid metal or a solid metal.

The present disclosure arranges a pair of friction stir welding tools including probes and fixed shoulders at corner portions between a first workpiece and a second workpiece. The friction stir welding tools are arranged so that regions where the probes are embedded in the respective the corner portions and stirred are positioned symmetrically with respect to the second workpiece. With this arrangement of the friction stir welding tools, the corner portions are friction stir welded simultaneously.

In the present disclosure, friction stir welding tools having probes and stationary shoulders are disposed at corners between a first workpiece and a second workpiece. A welding device main body includes axially perpendicular movement units for moving spindle units, which hold the respective friction stir welding tools on a frame, in directions perpendicular to rotary shafts of probes, and axial movement units for moving the spindle units in directions parallel to the rotary shafts of the probes.

In a method for producing a piston, a flat end surface 44a of a rotary tool 44 of a frictional pore sealing device is brought into abutment with the top surface 5a of a low thermal conductivity member 5 cast on the crown surface 2a of an aluminum alloy piston 1, and this rotary tool is pressed against the low thermal conductivity member's side with a load while rotating the rotary tool through an electric motor and a speed reduction mechanism. With this, a frictional heat between the top surface of the low thermal conductivity member and the end surface of the rotary tool causes to form a plastic flow layer 5d on the top surface, thereby sealing an opening portion of a pore 9a on the top surface of the porous member 6.

A method for producing the metal cylinder material according to the present disclosure includes: a process A of forming a slitted cylinder-shaped body including at least one slit extending from one end face to the other end face of a cylinder barrel portion consisting of at least one metal plate material; a process B of forming a filler-equipped cylinder-shaped body including a filling portion obtained by filling the slit with a filler for the filler to be filled throughout the slit in a length direction of the slit; and a process C of, by inserting at least a probe of a friction stir rotation tool including the probe at least into the filling portion and executing FSP, reforming at least the filling portion of the filler-equipped cylinder-shaped body to obtain the metal cylinder material including an FSP portion.

A method of joining a first work piece and a second workpiece. The first and second workpieces may be rotor wheels of a rotor for a turbomachine. At least one of the workpieces includes an oxide dispersion strengthened alloy material and the first and second work pieces may be joined by welding a cladding on at least one of the workpieces to the other of the workpieces, without welding a substrate of the at least one workpiece which includes an oxide dispersion strengthened alloy material.