A laser welded joint improving the tensile shear strength without causing an increase in the welding time and without using an expensive remote laser head, that is, a laser welded joint obtained by arranging metal sheets overlaid and welding them by a laser beam from the overlaid direction, wherein when a total thickness of the metal sheets welded overlaid is “t” (mm), the width of the weld metal at the joined interface is 0.6t1/3+0.14 (mm) or more.

Methods for welding motor vehicle body component subassemblies at a weld stations are disclosed. First and second pallets may be arranged for reciprocal movement between a load/unload station and the weld station and the pallets are alternately moved from a load/unload station to the weld station while the other pallet is moved from the weld station to a load/unload station. Each pallet may have a plurality of substations for receipt of component subassemblies and, while each pallet is at the load/unload station, the component subassembly at each substation is moved to the next successive substation and a further component is added to the moved component.

A thermal coating method for applying a functional layer to a workpiece surface, particularly for applying a running surface coating to a cylinder running surface of a crankcase of an internal-combustion engine, includes the steps of: melting a coating material by use of a melting device, applying coating material droplets to the workpiece surface by use of a gas jet aimed at the workpiece surface, which gas jet blows coating material droplets from a melting location of the melting device onto the workpiece surface, and cooling or rapidly freezing the coating material droplets during their transport from the melting location to the workpiece surface.

According to the present invention, provided are a joint structure (100) which joins a plurality of overlapped steel members (110, 120) using a connecting element (130) having a shaft portion (131), the joint structure including: a first steel member (110); and one or more of second steel members (120) overlapping the first steel member (110), in which the shaft portion (131) of the connecting element (130) is penetrated through the second steel member (120), and the shaft portion (131) of the connecting element (130) and the second steel member (120) are joined by friction welding, and the shaft portion (131) and the first steel member (110) are joined by friction welding, and a joining method for obtaining the joint structure.

A projection welding gun device includes an upper welding tip and a lower welding tip that are combined with a gun body through a shank, where the upper welding tip presses an upper panel corresponding to a protrusion portion that is formed on a lower panel to weld the upper and lower panels, and a rotation unit that is rotated by a driving portion is disposed between the gun body and the shank to rotate the shank.

A boring device includes: a rotatable body, which has a workpiece holder, a valve seat receiver and a debris passage portion; a laser emitter; a pump and a control unit. The workpiece holder can hold a nozzle body. The valve seat receiver contacts a valve seat of the nozzle body that is held by the workpiece holder. The laser emitter emits a laser beam to an outer wall of the nozzle body to bore injection holes at the nozzle body. The debris passage portion includes a debris passage that is placed on a radially inner side of the valve seat receiver and guides debris formed at the time of boring the injection holes with the laser beam. The pump vacuums the debris through the debris passage. The control unit controls a laser output power of the laser emitter and a suction force of the pump.

A method of resistance spot welding workpiece stack-ups of different combinations of metal workpieces with a single weld gun using the same set of welding electrodes is disclosed. In this method, a set of opposed welding electrodes that include an original shape and oxide-disrupting structural features are used to resistance spot weld at least two of the following types of workpiece stack-ups in a particular sequence: (1) a workpiece stack-up of two or more aluminum workpieces; (2) a workpiece stack-up that includes an aluminum workpiece and an adjacent steel workpiece; and (3) a workpiece stack-up of two or more steel workpieces. The spot welding sequence calls for completing all of the aluminum-to-aluminum spot welds and/or all of the steel-to-steel spot welds last.

A lightweight vehicle pan assembly and for attachment to a vehicle frame via welding includes at least one metal flange and a molded pan body. The at least one metal flange has a weld portion adapted for welded attachment to the vehicle frame and an interface portion extending from the weld portion. The molded pan body has a base wall and at least one side wall extending upward from the base wall. The interface portion of the at least one metal flange is embedded in the at least one side wall of the molded pan body. The interface portion includes at least two rows of apertures defined therein for increasing a bond strength between the at least one metal flange and the molded pan body.

A welding method and system (4) using a robotic arm (10), a welding robot (18) and a welding table (2) placed at an angle from horizontal to hold two C-channels (6 and 8) facing each other to maintain position and be welded together. C-channels (6 and 8) face each other to form a closed channel at increased welding speed with less materials having resulting benefits including constant welding, less distortion, and less welding material. Welding begins with restraining C-channels (6 and 8) in conjunction with the angled welding table (2). A robotic arm (10) handles C-channels (6 and 8) to move, place and restrain them relative to each other and the welding table (2). A pressing tool (12) may be a set of pressure-exerting tools (26). A welding robot (18) with a seam finding system (24) preferably welds the restrained C-channels (6 and 8) from top to bottom.

A multilayer flat steel product may include a multitude of mutually bonded steel alloy layers. A steel of a first steel alloy may be provided in at least one of the steel alloy layers, and a steel of a second steel alloy different than the first steel alloy may be provided in at least one of the other steel alloy layers. The steel of the first steel alloy may have high strength, and the steel of the second steel alloy may have lower strength and lower carbon content. To enable function-optimized modelling of local material properties in all directions, at least one steel of the first steel alloy and at least one steel of the second steel alloy may be present at least within one layer of the flat steel product. Further, a component, such as for a motor vehicle body, may be comprised of a corresponding flat steel product.