A heat exchanger manufacturing method comprising: a welding step of disposing a first weld bead through a thickness of one of the inner and outer plate portions and fusing the first weld bead to other of the inner and outer plate portions for joining together the first and second case halves, to thereby provide the heat exchange tube; and a temporary tacking step of providing a temporarily-assembled end plate/tube unit by temporarily tacking the heat exchange tube to each of the end plates by means of a second weld bead and filling, with the second weld bead, a gap of a generally triangular shape defined, at each of the opposite end portions of the heat exchange tube, by an outer surface of the inner plate portion, an end surface of the outer plate portion and a corresponding one of the end plates.

A method for producing a tube from metal is stated, by use of which method a metal strip by means of a drawing-off installation is moved in the longitudinal direction of said metal strip and is guided through a forming station in which said metal strip is formed to a slot tube having a slot running the in the longitudinal direction. The two edges of the metal strip abut to one another at the slot. Said two ends for producing a fully closed tube are welded to one another by use of a welding installation that is equipped with a laser. The slot tube after leaving the forming station is initially moved into the region of the laser and is then stopped. Thereafter, the regions of the edges of the slot tube that are to be welded to one another are pre-treated by the laser. Thereafter, the power of the laser is set to the welding power thereof that corresponds to the welding temperature, and by switching on the drawing-off installation the slot tube is simultaneously moved in the longitudinal direction of the latter.

A method for producing a tube from metal is stated, by use of which method a metal strip by means of a drawing-off installation is moved in the longitudinal direction of said metal strip and is guided through a forming station in which said metal strip is formed to a slot tube having a slot running the in the longitudinal direction. The two edges of the metal strip abut to one another at the slot. Said two ends for producing a fully closed tube are welded to one another by use of a welding installation that is equipped with a laser. The slot tube after leaving the forming station is initially moved into the region of the laser and is then stopped. Thereafter, the regions of the edges of the slot tube that are to be welded to one another are pre-treated by the laser. Thereafter, the power of the laser is set to the welding power thereof that corresponds to the welding temperature, and by switching on the drawing-off installation the slot tube is simultaneously moved in the longitudinal direction of the latter.

A longitudinal welded pipe assembly and welding mill contains a trestle, on which a welding bridge configured to move is mounted, such bridge carrying welding equipment with the first welding head designed for welding on the outside of the pipe blank. A pipe blank rotation system and assembly mandrels, each containing a blank pipe longitudinal edge clamping mechanism, are installed in the trestle leg span. The mill is fitted with a cantilever crossbar mounted in the supporting assembly, with the second welding head designed for inside welding, the clamping mechanism made as hydraulic stops. The pipe blank rotation system is a welding trolley configured to move over guides and having rotary rollers designed for positioning a pipe blank in the welding position, and supporting rotary rollers located near the assembly mandrels and configured to diverge crosswise with respect to the guides to enable movement of the welding trolley into the assembly mandrel area and move in reverse up to the stop to the pipe blank surface. Technical result: expansion of the technological capabilities of existing mills by integrating equipment enabling to weld from inside and outside of the pipe blank in various sequence using various technologies and observing the geometrical accuracy of bringing together the blank edges for pipes of various diameter, in particular, for large diameter pipes.

A longitudinal welded pipe assembly and welding mill contains a trestle, on which a welding bridge configured to move is mounted, such bridge carrying welding equipment with the first welding head designed for welding on the outside of the pipe blank. A pipe blank rotation system and assembly mandrels, each containing a blank pipe longitudinal edge clamping mechanism, are installed in the trestle leg span. The mill is fitted with a cantilever crossbar mounted in the supporting assembly, with the second welding head designed for inside welding, the clamping mechanism made as hydraulic stops. The pipe blank rotation system is a welding trolley configured to move over guides and having rotary rollers designed for positioning a pipe blank in the welding position, and supporting rotary rollers located near the assembly mandrels and configured to diverge crosswise with respect to the guides to enable movement of the welding trolley into the assembly mandrel area and move in reverse up to the stop to the pipe blank surface. Technical result: expansion of the technological capabilities of existing mills by integrating equipment enabling to weld from inside and outside of the pipe blank in various sequence using various technologies and observing the geometrical accuracy of bringing together the blank edges for pipes of various diameter, in particular, for large diameter pipes.

A method for the continuous production of coaxial cables (224) having a thin-walled, radially closed outer conductor of nonferrous metal comprises supplying a flat strip of the nonferrous metal to a shaping apparatus (212), wherein the thickness of the strip corresponds to the wall thickness of the coaxial cable. The shaping apparatus is configured to continuously shape the supplied flat strip into a form corresponding to the outer conductor of the coaxial cable and around a cable core supplied before the outer conductor is closed. After the shaping, two opposite edges of the flat strip lie flush against one another in a contact region and are continuously welded to one another by a welding apparatus (216) by means of a laser, which radiates light having a wavelength smaller than 600 nm. The laser heats a point in a welding region that has a diameter smaller than 20% of the cross-sectional dimension of the coaxial cable. The welded coaxial cable is drawn off from the welding region and, after introducing a parallel or helical corrugation, is received in a receiving device (226).

A carrier component for a vehicle application, formed by two half-shells that are welded to one another at contact sides. When assembling the two half-shells for joining same at the contact sides, in a position in which the two half-shells are arranged above one another, the point of contact of the lower half-shell protrudes in relation to the external closed side of the other half-shell. The point of contact of one of the two half-shells protrudes inward in relation to the internal closed side of the other half-shell. A method for producing a carrier component from two half-shells is also disclosed.

A carrier component for a vehicle application, formed by two half-shells that are welded to one another at contact sides. When assembling the two half-shells for joining same at the contact sides, in a position in which the two half-shells are arranged above one another, the point of contact of the lower half-shell protrudes in relation to the external closed side of the other half-shell. The point of contact of one of the two half-shells protrudes inward in relation to the internal closed side of the other half-shell. A method for producing a carrier component from two half-shells is also disclosed.

For producing a welded ring, a band of a length corresponding to the circumference of the ring is bent into a ring and its two ends are welded together. The band ends to be welded together have an offset in the circumferential direction of the ring, the offset lying in the plane of the band. The welding is performed from both lateral edges of the ring, from the outside to the inside up to the offset. Welding having an overall improved welding quality and a higher tensile strength is thus obtained.

For producing a welded ring, a band of a length corresponding to the circumference of the ring is bent into a ring and its two ends are welded together. The band ends to be welded together have an offset in the circumferential direction of the ring, the offset lying in the plane of the band. The welding is performed from both lateral edges of the ring, from the outside to the inside up to the offset. Welding having an overall improved welding quality and a higher tensile strength is thus obtained.