A welding system of cylindrical structures which welds a welding end surface of an upper cylindrical structure and that of a lower one in an axial direction thereof, includes: two or more welding apparatuses opposite to the welding end surfaces and disposed at equal arrangement intervals in the circumferential direction thereof; a moving device configured to rotate the upper and lower cylindrical structures relative to the welding apparatuses in a circumferential direction thereof; and a control device configured to control the welding apparatuses and the moving device. The welding apparatus has a filler metal and a heating source therefor, and melts and fuses the filler metal on the welding end surfaces to weld them, and the control device is configured to continuously rotate the upper and lower cylindrical structures an angle of the arrangement interval by the moving device, while welding the welding end surfaces with the welding apparatuses.

A welding system for applying a weld to a workpiece, the welding system including a frame, a welding torch mounted on the frame, the welding torch including an electrode; a wire guide adapted to direct a wire toward the electrode; a wire alignment assembly including a fixture frame having a wire guide holder mounted thereon, the wire guide being supported on the wire guide holder, wherein the wire alignment assembly includes multiple degrees of freedom for adjusting the position of the wire guide as needed for a given welding operation.

A mounting attachment with a connection area for a gas line includes a first cylindrical fastening medium and a second cylindrical fastening medium, which are in particular screwable into each other. The first fastening medium and/or the second fastening medium are prepared in a 3D-plastic printing process. A pipe to be welded is inserted into the first cylindrical fastening medium by means of an essentially central lead trough in the first cylindrical fastening medium, with a cylindrical area of insertion for the pipe to be welded in the second fastening medium. The area of application includes an attachment ring area and a connection area for a gas feed hole for feeding forming gas to a gas-use point by means of a forming gas pipe in the pipe to be welded. The pipe used is sealed against the cylindrical fastening media by one or more flexible seals.

The invention described herein generally pertains to systems and methods related to repeatable and accurate setting of welding torch lead and lag positions, particularly with orbital welding systems. Specifically, a torch is coupled with a lead-lag coupler having a stop lug. A stop set with a stop pin is rotated to a desired position of lead or lag and secured. The lead-lag coupler, and torch which rotates therewith, are then unsecured and rotated until the stop lug contacts the stop pin. In this position, the torch is maintained at the desired angle. The stop pin remains in place throughout operation(s) to permit quick, accurate return to the desired angle if the torch is temporarily moved out of position.

A method for manufacturing a ceramic heater-type glow plug (1) that includes: a ceramic heater (11); and a metallic outer cylinder (12) that holds the ceramic heater at one end and has the other end inserted in and fixed to a metallic housing (14), the housing having a first housing section (14a) and a second housing section (14b) coaxially arranged with each other, the method for manufacturing a ceramic heater-type glow plug includes the steps of: inserting the ceramic heater in the outer cylinder; inserting the outer cylinder in the first housing section, the second housing section, and a ring-shaped filler material (18) in a state where the filler material is interposed between the first housing section and the second housing section; and joining the first housing section, the second housing section, and the outer cylinder by welding at a position where the filler material is provided.

A welding system includes at least one high intensity energy source to create a weld puddle during a root pass on a narrow joint of a workpiece with a clad layer. The system also includes a controller to control a weld ramp out process such that, as the molten puddle advances to a start of an existing root pass weld, the controller at least one of decreases an energy output of the at least one high intensity energy source and reduces an interaction time between the at least one high intensity energy source and the weld puddle. After completion of the root pass, a thickness of a root pass weld in a region that is at or near the start point of the existing root pass weld is in a range of 100 percent to 130 percent of a nominal root pass thickness of a remainder of the root pass weld.

A welding device for a non-circular plate according to an embodiment includes a chuck for gripping and rotatably supporting a plurality of laminated non-circular plates, a welding torch for welding outer peripheral edge portions of the plurality of laminated non-circular plates, a stationary shield box, and a movable shield box which is position-adjustable with respect to the welding torch so as to form a shield space surrounding the welding torch with the stationary shield box.

An apparatus for providing an inert atmosphere to the inside of a piping assembly prior to and during welding, including a cannister, and a bladder which surrounds the cannister and fits inside of a piping assembly to be welded. The cannister including a purge gas inlet connection fluidically connected to a bladder fill conduit, a bladder return conduit fluidically connected to a pressure relief device, the pressure relief device fluidically connected to a reduced pressure purge gas conduit, a primary purge gas diffuser, a secondary purge gas diffuser, a tertiary purge gas diffuser, and purge gas exit holes. Wherein the bladder fill conduit is configured to introduce purge gas into the bladder. Wherein the bladder is configured to expand and form a seal between the cannister and the piping assembly to be welded. And, wherein the bladder return conduit is configured to evacuate excess purge gas from the bladder.

An orbital welding device (1), having a welding current source (10) in a welding current source housing (11) and a base controller (12), and an orbital welding head (20) connected to the welding current source (10) by a cable (2), the orbital welding head (20) having a pipe mount (21) and a welding electrode holder (22) mounted rotatably with respect to the pipe mount (21) for holding a welding electrode (23). A motor (31) is designed to drive the welding electrode holder (22). The orbital welding head (20) has a chamber (50) for shielding gas, and an electrical circuit (60) that is connected: to a position sensor (41) designed to generate a position value (41.1); and/or to a memory device (61) designed to store one or more loading values (61.1) and/or one or more calibrating values (61.2) in the memory device (61).

An internal clamping and welding device for joining tubes by their distal ends, the device comprising movement means in order to be moved inside the tubes, separate clamping means for cooperating with the inner surfaces of the tubes to be welded, and a welding head mounted so as to be able to both rotate about a longitudinal axis of the tubes, and also pivot in order to be tiltable relative to a support of the clamping means.