A machine comprises a tool for pre-positioning of a body of an exhaust component and a fitting tool having a passage converging from a large opening to a small opening. An actuator device is configured to push the body along a main axis of the machine toward a cover of the exhaust component through the converging passage.

A pressure vessel includes: (a) a cylindrical sidewall having a wall thickness, an inside surface, an outside surface, and the cylindrical sidewall extending between a first end and a second end, wherein one of the first end or the second end includes a sidewall edge that forms part of an outwardly opening weld groove; (b) an end cap constructed to engage the cylindrical sidewall edge, the end cap comprising an end cap edge corresponding to the sidewall edge and that, when combined with the sidewall edge, forms the outwardly opening weld groove; (c) a cylindrically extending backer bar located in support of the outwardly opening weld groove formed by the sidewall edge and the end cap edge; and (d) a weld joint formed in the outwardly opening weld groove and holding the cylindrical sidewall to the end cap. A method for welding a pressure vessel sidewall and end cap together is provided.

A method for connecting functional elements (14) to a shaft (10, having the following steps: (a) forming elevations (12) for receiving the functional elements (14), said elevations (12) being machined out of the shaft (10) by removing material, and (b) welding the functional elements (14) to the elevations (12) on the shaft (10).

A plurality of welding torches, which are disposed in a welding device and are made movable in three-dimensional directions, are provided with welding wires that differ in composition and diameter from each other. When welding is performed in the horizontal direction, an arc is generated by at least two of the welding torches to form a bead while the welding wires are being fed. When welding is performed in the vertical direction, the arc is generated by any one welding torch of the two welding torches to form a bead while the welding wire is being fed. Thus, a steel sheet to which an anti-corrosion material has been applied can be welded continuously with high quality and high-efficiency in a horizontal orientation and vertical orientation.

Techniques and devices are disclosed for fabrication layout device. The device includes a table with a work surface. The work surface being a continuous surface and configured to support a plurality of railing pieces for fabrication of a railing assembly. The device further includes a beam located above the work surface. The beam is operatively coupled to the table, such that the beam moves relative to the work surface in a first direction. Attached to the beam is an ink dispenser. The ink dispenser is configured to move along the beam in a second direction different from the first direction. The ink dispenser is further configured to dispense ink onto the work surface of the table in the form of a pattern of the railing assembly. Railing pieces are positioned on the pattern so that they can be assembled to one another.

Melting energy exemplified by an arc (24) is delivered to a metal alloy material (22, 23), forming a melt pool (26). A metal oxide material (34) is delivered (33) to the melt pool and dispersed therein. The melting energy and oxide deliveries are controlled (44) to melt the alloy material, but not to melt at least most of the metal oxide material. The deliveries may be controlled so that the melting energy does not intercept the metal oxide delivery. The melting energy may be controlled to create a temperature of the melt pool that does not reach the melting point of the metal oxide. Deliveries of the melting energy and the oxide may alternate so they do not overlap in time. A cold metal transfer apparatus (22) and process (18, 19, 20) may be used for example in combination with an oxide particle pulse delivery device (42, 46).

A method for manufacturing a different material joined member comprises: a step of punching a shaft portion of a steel rivet into a light alloy material provided with a solid resin layer on at least one surface thereof; a step of causing a shaft portion tip of the rivet to protrude from the solid resin layer on the light alloy material; a step of laying a steel material over the surface of the light alloy material on the side where the shaft portion tip of the rivet protrudes, with the solid resin layer therebetween; and a step of welding the shaft portion of the rivet with the steel material. Instead of punching the rivet, a hole may be drilled in the light alloy material provided with the solid resin layer together with the solid resin layer, the steel material may be laid over via the solid resin layer, and the shaft portion of the steel rivet may be inserted into the hole.

A spark absorbing system for use with a cutting torch, comprises a cap having at least one spark opening therethrough and a spark capture unit coupled to the cap and positioned to capture sparks passing through the spark opening. The spark capture unit may comprise a tube extending from the cap and may include an outlet and a flow-reduction element positioned between the cap and the outlet and/or a spark accumulator between the cap and the spark capture unit. The flow-reduction element may comprise at least one baffle, screen or mesh. The spark absorbing system may further include a spark ramp extending from the cap opposite the spark capture unit and/or a shield, which may define a cutting space between the shield and the cap.

A welding system includes a welder, a human-machine-interface, an identification-device, a test-device, a memory, and a controller-circuit. The welder creates an assembly between electrical-components. The human-machine-interface receives an input from an operator and displays instructions to the operator. The identification-device creates a label identifying the assembly. The test-device produces test-data of the weld-joint. The memory stores welder-process-data of the weld-joint. The controller-circuit activates the welder, stores the welder-process-data in the memory, determines whether the welder-process-data violates a quality-metric, determines a number of violating-weld-joints, activates an alert-device to alert the operator to violating-weld-joints, disables the welder when a number of violating-weld-joints exceeds a threshold, activates the identification-device to create the label, instructs the operator to attach the label to the assembly having the violating-weld-joints, instructs the operator to perform a test of the violating-weld-joints with the test-device, and stores the test-data of the violating-weld-joints in the memory linked to the identity.

A gas shielded arc welding method includes welding a steel sheet with a tensile strength of 780 MPa or more using a shielding gas containing Ar in an amount of 92 vol. % to 99.5 vol. %. In the gas shielded arc welding method, a value calculated from the following expression (1) is 0.20 or more: {v/(D/2).sup.2}10{(100C.sub.Ar)I/v}0.1 . . . (1), where C.sub.Ar represents an Ar content (vol. %) in the shielding gas, D represents an inner diameter (mm) of a nozzle from which the shielding gas is supplied, v represents a welding speed (cm/min), and I represents a welding current (A).