A joining connection with a weld seam running between a first metal component and a second metal component and produced by a beam welding method. The weld seam has a weld seam main section extending along a joining gap formed between the metal components, the weld seam has a weld seam starting section leading from the direction of the joining gap into the first or second component. The first or second component has a recess in the region of the weld seam starting section that is lowered in relation to the upper edges of the two components forming the joining gap, and/or the weld seam has a weld seam end section leading from the direction of the joining gap into the first or second component.

A system for making a welded assembly. The system may include a welding system that is configured to weld a first part to a second part with a laser beam. The system may further include an integrated feeder nozzle that includes an inlet manifold that receives a shield gas, and a nozzle body secured to the inlet manifold. The nozzle body may include a plurality of peripheral apertures that extend through the conical distal region and that are arranged around a central axis of the nozzle body. The system may further include a wire feeder disposed in the inlet manifold and the nozzle body. The wire feeder receives a welding wire and guides the welding wire to the central aperture.

A method for producing a piston for an internal combustion engine may include arranging a piston upper part and a piston lower part in a friction welding device. The piston upper part may include a piston head with a combustion recess. The piston lower part may include two mutually opposite skirt elements connected to one another via two mutually opposite pin bosses. The method may also include arranging a deflecting device configured to deflect at least one weld bead one of on and in the friction welding device. The method may further include joining the piston upper part and the piston lower part to one another via friction welding.

A weld includes a first component and a second component. The first component includes a fay surface with one or more grooves. The second component includes a surface that is configured to mate with the fay surface of the first component. The fay surface of the first component and the surface of the second component form a friction weld when the two surfaces are mated together and relative motion between the first component and the second component generates heat through mechanical friction between the two components.

A lap-fillet arc welding joint includes a weld bead, the weld bead being formed on an end portion of one sheet of overlapped two sheets and a surface of other sheet along the end portion. The other sheet includes a projecting portion projecting from the surface at a side of a weld toe of at least one of a start portion and a termination portion of the weld bead. The weld toe is located on a slope surface portion of the projecting portion at a side of the end portion of the one sheet.

Disclosed is a welded structural member production method comprises: a first preparation step of preparing a cross-sectionally hat-shaped first metal workpiece which has a first base wall, a pair of first standing walls and a pair of flanges; a second preparation step of preparing a cross-sectionally U-shaped second metal workpiece which has a second base wall, and a pair of second standing walls; a positioning step of positioning the first metal workpiece and the metal workpiece in such a manner that each of two pairs of distal edges of the second standing walls and inner edge regions of the flanges are butted against each other; and a joining step of externally welding a butted region of each of the pairs of the distal edges of the second standing walls and the inner edge regions of the flanges to thereby join the first and second metal workpieces together.

A weld joint assembly is provided. The weld joint assembly includes a first structural member having a first thickness. The weld joint assembly also includes a second structural member having a second thickness. The first thickness is different from the second thickness. The second structural member is connected to the first structural member through a weld joint. A plate is connected to the first and second structural members through the weld joint. The plate has a third thickness. The plate extends and abuts a surface of one of the first and second structural members and is welded thereto at outer edges of the plate leading away from the weld joint. At least a portion of the outer edge of the plate that is opposite to the weld joint is free of attachment to the surface.

A method for welding two components is provided. The method includes providing a first component, which has a convex elevation, and providing a second component, which has a through-hole. The method also includes placing the two components one against the other such that the convex elevation of the first component protrudes into the through-hole in an interlocking manner, and welding the two components along the rim of the through-hole by way of a laser welding device. The welding is performed without the use of a welding filler and the laser welding device is repeatedly switched on and off in a pulsed manner during the welding of the two components along the rim of the through-hole.

To provide a metal bonded product wherein a large bonding area can be provided to achieve high bonding strength and coaxial accuracy can be easily achieved needing no positioning jig. A first taper portion 16 is formed on a side wall surface of the opening 13 of the ring-shaped metal member 12, and multiple step-shaped bonding surfaces are formed thereon. An end of the cylindrical portion 11 has a second taper portion 17 with the same chamfer angle as that of the first taper portion 16 of the ring-shaped metal member 12. The ring-shaped metal member 12 and the cylindrical metal member 11 are bonded to each other by press-fitting the cylindrical portion of the cylindrical metal member 11 in the opening 13 of the ring-shaped metal member 12 while applying a current to cause the side wall portion of the cylindrical portion of the cylindrical metal member 11 and the multiple step-shaped bonding surfaces of the first taper portion 16 to undergo plastic flow.

A bead structure for non-pressure mark welding, which is applied to panels for joining a plurality of overlapped panels through projection welding may include a plurality of beads which protrude in the same direction toward an upper portion by pressing the panel disposed in a lower portion among the overlapped panels, and when center points of the beads are connected by a straight line, the beads are disposed to be distanced from each other at a predetermined to form a triangle.