A method for manufacturing a rim is provided to overcome the problem that the strength of the rim as manufactured by the conventional manufacturing method reduces due to the annealing of the welding operation. The method includes processing a first material with a cold stamping process to form a disc embryo, with the first material being made of steel; processing a second material with a cold rolling process to form a rim embryo, with the second material being made of steel; coupling the disc embryo and the rim embryo with each other by a welding approach to form a semi-processed rim; and processing the semi-processed rim with a hot stamping process to form the rim.

Disclosed is an improved method of manufacturing cooled accelerator grid with full penetration weld configuration. In a preferred form, the method includes the steps of: machining a plurality of stubs, a first and a second end of a plurality of inconel pipes; welding the stubs with the first end of the inconel pipes forming a water connector assembly; machining of a base plate; welding the base plate with the water connector assembly; machining the base plate welded with the water connector assembly, wherein machining further comprises milling of plurality of cooling channels across angled plane of the base plate welded with the water connector assembly; closing of plurality of cooling channels located on the base plate welded with the water connector assembly; and welding each of plurality of external hydraulic circuits with the second end of each of the plurality of inconel pipes.

A method to repair an opening in a metallic device including: mount the device on a positioner; while the device is mounted on the positioner, sense and record positions of a surface of an opening in the device using a probe operated by a manipulator; based on the recorded positions determine a centerline and diameter of the opening; orient a digital model of the opening with respect to the opening of the device based on the centerline and diameter of the opening, and apply an weld or cladding to the opening by a welding torch maneuvered automatically by the manipulator while the device is mounted to the positioner and based on the oriented digital model of the opening.

A method of producing a stabilizer (10) of a motor vehicle, such that the stabilizer includes a torsion bar (11) and longitudinal links (12, 13). The longitudinal links (12, 13) are in each case connected to the torsion bar (11) by welding, and the longitudinal links (12, 13) and the torsion bar (11) are heat-treated before welding. Each longitudinal link (12, 13) is welded at one end to the torsion bar (11) on both sides, in each case, by a respective multilayer weld seam (14), and each weld seam (14) is made with unequal widths such that the width of the weld seam (14) adjacent to the torsion bar (11) is shorter than its width adjacent to the respective longitudinal link (12, 13).

A method for welding tubes in a shell and tube heat exchanger, including forming ring-shaped tube sheet grooves on the tube sheet at the shell side, inserting tube joint members into the tube insertion holes of the tube sheet, producing ring wires by cutting a welding wire into pieces and bending the pieces into a ring shape, affixing the ring wire to the outer circumference of one end of the tube, inserting the end of the tube into the tube sheet such that the end of the tube contacts one end of the tube joint member and is located within the recessed distance range of the tube sheet groove, and performing shell side welding by inserting a welding torch into the tube joint member and welding the end of the tube joint member, the end of the tube and the joint part to the tube sheet at the shell side using the ring wire as filler metal.

A tube and tubesheet assembly is provided, which includes a tubesheet, the tubesheet comprising at least one tube insertion aperture therethrough; at least one tube inserted in the at least one tube insertion aperture; and a damage-resistant layer applied to an edge of the at least one tube and along an inner surface of a portion of the tube that is positioned within the corresponding tube insertion aperture. A heat exchanger including the assembly is also provided. A method is also provided for coupling a tube to a tubesheet. The method includes applying a damage-resistant layer to an edge of the tube and along an inner surface of a portion of the tube that is positioned within a tube insertion aperture in the tubesheet. The method can also be used to repair tubes and retrofit pre-existing tube-to-tubesheet joints.

The invention is directed at the mechanical engineering industry field. More in detail, the invention concerns an orbital welding head (1) for welding tubes (2) to tube plates (3) of heat-exchangers comprising, operationally connected to each other: an electrode holder welding torch (4), supply lines for a welding current and technical gases; a rotating joint (6) comprising a hollow fixed distributor body, a bush comprising an external thread adapted to cooperate with a corresponding internal thread of said fixed distributor body and adapted to be fitted on a rotating shaft, and a plurality of flexible blades adapted to deform elastically to ensure the contact and transmission of the welding current from said fixed distributor body a said rotating shaft. Said flexible blades each comprise a first and second end, where each first end protrudes axially from said bush and each second end is free, so as to be cantilevered with respect to said bush to elastically clamp said rotating shaft.

Producing welded connections between inner tubes and tube support plates of a tube bundle for a product-to-product shell-and-tube heat exchanger by means of an auxiliary device is described. A production method includes pressing the end face of a tube support plate against the end face of the inner tubes in the direction of the inner tube longitudinal axes during welding operations with a first form fit, which is effective both radially and axially, immovably fixing the number of inner tubes corresponding to the tube layout pattern to each other by a second, detachable form fit of the auxiliary device, making a circumferential round weld orbitally, starting from the plate inner bore and the tube inner bore, in a single pass and continuously from radially inside to radially outside, and detaching and removing the auxiliary device from the welded tube bundle.

The present invention relates to a pipe connection assembly of a heat exchanger for connecting a header tank and a pipe of the heat exchanger, in which a means for preventing a welding ring that fixes a manifold and a pipe from entering into a hollow at one end of the manifold before welding is disposed, and a space is formed between the inner surface of the one end of the manifold and the outer surface of the pipe, thereby preventing the molten welding ring from flowing out.