A control unit and method for a joining system having at least one joining station, which is designed to join at least one first joining element to a workpiece, determines actual data with respect to a first joining element joined to a current workpiece by the joining station. The control unit and method determine, in accordance with the actual data, a subsequent control instruction for the joining station for joining a first joining element to a subsequent workpiece.

A junction structure includes a first material that is a metallic material, a third material that is a metallic material and is weldable to the first material, and a second material which is a nonferrous metallic material or a nonmetallic material. The second material is sandwiched and fixed between the first material and the third material by lap joining. At least one of the first material or the third material has a weld zone where the first material and the third material are melted and joined together, and at least one exhaust groove or at least one exhaust hole around the weld zone. The at least one exhaust groove or the at least one exhaust hole penetrates a thickness of the at least one of the first material or the third material.

Process for manufacturing a part, in particular a composite cast part, includes the steps of: providing at least one insertion element; casting a casting material around at least a portion of the at least one insertion element such that at least one contact area is formed between the at least one insertion element and the casting material; and welding the at least one insertion element to the casting material in the contact area.

The invention provides a surface treatment method for a magnesium alloy hub. The process includes: cleaning a to-be-treated surface of the magnesium alloy hub; blackening the cleaned to-be-treated surface; and laser cladding the blackened to-be-treated surface, wherein a laser cladding mode is a synchronous powder feeding mode, and a coating material is chromium. According to the surface treatment method for the magnesium alloy hub, air holes can be avoided.

The present disclosure provides a method of manufacturing a one-piece wheel having a hollow structure for noise reduction. At least one embodiment of the present disclosure provides a method of manufacturing a one-piece wheel having a hollow structure for noise reduction, the method comprising: fabricating, by using one or both of gravity casting and low-pressure casting, an integral casting in which a disk portion and a wheel rim portion are integrally formed, wherein the rim portion includes an annular protrusion radially protruding from an outer circumferential surface; forming at least one cavity by bending the annular protrusion through flow forming to provide a bending portion, resulting in the cavity using the bending portion and one side of the disk portion; and performing a friction stir welding between the one side of the disk portion and one end of the bending portion.

An electromagnetic pulse additive device for a connection ring of a heavy-lift carrier rocket is provided. The device includes brackets, a gear disk rotatably matched with the annular ground rail through a plurality of rolls arranged in a circumferential direction of the gear disk, a first drive motor, an annular ground rail, and a guide rail in a semicircular shape arranged at top ends of the brackets. An output shaft of a first drive motor is fixedly provided with a first drive gear engaged with the gear disk. The guide rail is slidably provided with three lifting modules which respectively drive a bending module, an electromagnetic head arranged electromagnetic coil electrically connected with a capacitor and a discharge circuit, and a rotational friction and extrusion module including a second drive motor and a friction bar fixedly connected to an output shaft of the second drive motor to rise and fall.

A cold-rolled and heat-treated steel sheet having a microstructure consisting of, in surface fraction: between 10% and 30% of retained austenite, the retained austenite being present as films having an aspect ratio of at least 3 and as Martensite Austenite islands, less than 8% of the Martensite Austenite islands having a size above 0.5 μm, at most 1% of fresh martensite, at most 50% of tempered martensite, and recovered martensite containing precipitates of at least one element chosen among niobium, titanium and vanadium. A method for manufacturing the cold-rolled and heat-treated steel sheet is also described.

A reinforcing member for cold forming according to an embodiment comprises: a blank member; and a reinforcing patch member provided to cover at least a portion of the blank member and coupled to the blank member by a plurality of welded portions, wherein the entire region of a heat-affected zone formed around the welded portions in the blank member is positioned in a region corresponding to the reinforcing patch member, and a heat-affected zone formed around a first welded portion from among the welded portions may contact the central point of a second welded portion adjacent to the first welded portion or may be formed to be spaced apart from the central point of the second welded portion.

A method and device for producing a predetermined breaking line in a vehicle interior trim part with a scanning laser beam. An actual position of the vehicle interior trim part held in a working plane relative to a laser scanning device is detected by a camera and the actual position of the predetermined breaking line is derived. A stored desired position for a scan figure corresponding to the predetermined breaking line is corrected to an actual position, whereby the predetermined breaking line is produced at a predetermined position on the vehicle interior trim part during scanning of the scan figure. A positional shift of the scan figure becomes possible because a sensor matrix with an upstream diffuser is used, which can detect transmitted components of the laser beam independently of the position of the laser beam along the scan figure.

A milling machine having a power source that generates an output power for performing one or more work operations. The milling machine also includes a rotor that receives a portion of the output power from the power source for operation thereof. The milling machine further includes a welding device disposed on the milling machine for servicing one or more machine components of the milling machine. The welding device is powered by the power source.