Welding machine (1) comprising a resting plane (P) configured to support respectively a tail portion and a head portion of two metal sheets to be joined. The metal sheets are slidable along an advancement direction (A). The welding machine (1) also comprises sheet-metal pressing means (2) configured to lock in a set position the head and tail portions on the resting plane (P) and a plurality of welding torches (3) configured to join respective edges of the tail and head portions. The welding torches (3) are slidably movable along a transverse direction (B) to the advancement direction (A). The welding machine (1) is characterized in that it also comprises a plurality of grounding contacts (4) that is each electrically associated with a respective welding torch (3) and movable solidly constrained to the respective welding torch (3) along the transverse direction (B).

The application relates to a device and to an assembly line for producing a supporting structure for a passenger transport system, such as an escalator, which have a sequential arrangement of semi- or fully automatically operating and mutually cooperating assembly stations and a sequential order of assembly steps. Each of the assembly stations can include at least one holding device and at least a welding robot as well as, optionally, at least one handling robot. The assembly stations are configured in such a way that intermediate products can be produced efficiently by respective assembly steps. Each can be coordinated with a subsequent assembly station, so that the intermediate products can be passed sequentially with optimized short cycle times from assembly station to assembly station, to be able to provide a finished, load-bearing supporting structure at the end of the sequence.

The application relates to a device and to an assembly line for producing a supporting structure for a passenger transport system, such as an escalator, which have a sequential arrangement of semi- or fully automatically operating and mutually cooperating assembly stations and a sequential order of assembly steps. Each of the assembly stations can include at least one holding device and at least a welding robot as well as, optionally, at least one handling robot. The assembly stations are configured in such a way that intermediate products can be produced efficiently by respective assembly steps. Each can be coordinated with a subsequent assembly station, so that the intermediate products can be passed sequentially with optimized short cycle times from assembly station to assembly station, to be able to provide a finished, load-bearing supporting structure at the end of the sequence.

A flux-cored wire according to an aspect of the present invention includes: a steel sheath; and a flux filling the inside of the steel sheath, in which the flux contains 0.11% or more in total of a fluoride in terms of F-equivalent value, 4.30% to 7.50% of a Ti oxide in terms of TiO.sub.2 equivalent, 0.30% to 2.40% in total of an oxide in terms of mass %, and 0% to 0.60% in total of a carbonate in terms of mass %, the amount of a Ca oxide in terms of CaO is less than 0.20% in terms of mass %, the amount of CaF.sub.2 is less than 0.50%, a chemical composition of the flux-cored wire is within a predetermined range, a Z value is 2.00% or less, a V value is 5.0 to 27.0, and Ceq is 0.30% to 1.00% or less.

Systems and methods include a system for installing insulation sleeves on pipelines. A portable welding robot is configured to weld a plug base longitudinally along a top edge of a pipeline. The plug base supports plugs configured to engage with holes in both overlapping sides of an insulation sleeve configured to insulate the pipeline. A portable pipeline insulation installation fixture is configured to lift the insulation sleeve and install the insulation sleeve around the pipeline including using electric hoists to lift ends of strands beneath and on either side of the pipeline. Each strand is enclosed in an external tube configured to contact and roll along the insulation sleeve and to rotate relative to the strand. The external tubes are configured to wrap the insulation sleeve around the pipeline.

Provided is a ceramic shelf assembly for aiding formation of a butt weld of adjacent metal plates in a groove formed between adjoining plates. The assembly has at least one ceramic block having at least one straight edge. The assembly further provides an apparatus for removably attaching the rear side of the ceramic block to a front surface of one of the adjacent metal plates along an edge of the groove.

Provided is a ceramic shelf assembly for aiding formation of a butt weld of adjacent metal plates in a groove formed between adjoining plates. The assembly has at least one ceramic block having at least one straight edge. The assembly further provides an apparatus for removably attaching the rear side of the ceramic block to a front surface of one of the adjacent metal plates along an edge of the groove.

Embodiments of systems and methods of additive manufacturing are disclosed. In one embodiment, a computer control apparatus accesses multiple planned build patterns corresponding to multiple build layers of a three-dimensional (3D) part to be additively manufactured. A metal deposition apparatus deposits metal material to form at least a portion of a build layer of the 3D part. The metal material is deposited as a beaded weave pattern, based on a planned path of a planned build pattern, under control of the computer control apparatus. A weave width, a weave frequency, and a weave dwell of the beaded weave pattern may be dynamically adjusted during deposition of the beaded weave pattern. The adjustments are under control of the computer control apparatus based on the planned build pattern, as a width of the build layer varies along a length dimension of the build layer.

Embodiments of systems and methods of additive manufacturing are disclosed. In one embodiment, a computer control apparatus accesses multiple planned build patterns corresponding to multiple build layers of a three-dimensional (3D) part to be additively manufactured. A metal deposition apparatus deposits metal material to form at least a portion of a build layer of the 3D part. The metal material is deposited as a beaded weave pattern, based on a planned path of a planned build pattern, under control of the computer control apparatus. A weave width, a weave frequency, and a weave dwell of the beaded weave pattern may be dynamically adjusted during deposition of the beaded weave pattern. The adjustments are under control of the computer control apparatus based on the planned build pattern, as a width of the build layer varies along a length dimension of the build layer.

A method for joining a plated steel sheet includes forming a plurality of protrusions, overlapping a first steel sheet, and performing arc welding, by which first and second steel sheets, at least one of which is a plated steel sheet, are arc welded. In the forming, the plurality of protrusions that is substantially perpendicular to an edge portion of the first steel sheet and is positioned along the edge portion is formed in an overlapping surface of the first steel sheet. In the overlapping, the first and second steel sheets are overlapped such that the protrusions protrude in a direction toward an overlapping surface of the second steel sheet. In the performing the arc welding, an arc welding is performed linearly in the edge portion of the first steel sheet or second steel sheet.