A welding device for welding a workpiece using a welding robot includes a welding control device that controls operation of the welding robot and a preheating device that preheats the workpiece. The welding control device includes an input unit through which at least one or both of dimensions of the workpiece and a shape of a welding joint, and preheating information are inputted, and a storage unit that includes at least welding robot operation orbit teaching data, welding condition data, and preheating condition data. The welding control device automatically provides a preheating condition, a welding robot operation orbit, and a welding condition for the welding joint to be welded, and preheating and welding are performed.

A beam-end component welding fixture is disclosed, including a stand having a central horizontal axle mechanism and a housing. A handle is mounted on a first end portion of the axle mechanism and a rotatable plate structure is mounted on a second end portion of the axle mechanism. A column connecting simulator is attached to the plate structure and configured to support a beam-end component.

A collar flange assembly welding fixture is disclosed, including a stand, a circular mount structure, and a support assembly which are configured to provide access to a front side and a back side of a collar flange assembly held by the support assembly. The stand has a plurality of circumferential bearings equidistant from an axis of rotation, the circular mount structure is rotatably supported by the circumferential bearings, and the support assembly is configured for mounting on the circular mount structure.

Some embodiments of the present disclosure relate to an additively manufactured transport structure. The transport structure includes cavities into which components that use an external interface are inserted. A plurality of components are assembled and integrated into the vehicle. In an embodiment, the components and frame are modular, enabling reparability and replacement of single parts in the event of isolated failures.

A rotator is disclosed. The rotator includes a base and a mounting ring supported by the base. The rotator further includes a plurality of rollers on which the mounting ring rests when the rotator is fully assembled. The rotator is configured to support a steel column and allow rotation of the steel column to facilitate fabrication of the steel column.

A muntin bar fabrication system can be used to efficiency produce a wide variety of different types of muntin bars, allowing the fabrication of both standard and custom muntin bar assemblies for doors, windows, and other fenestration products. In some examples, the fabrication system includes a muntin bar stock storage assembly that holds multiple different types of muntin bar stock. The system also includes a muntin bar stock extraction device that extracts one of the different types of muntin bar stock from the storage assembly and conveys the extracted muntin bar stock to a feed device. The feed device feeds the extracted piece of muntin bar stock into a cutting system that includes a multi-axis cutter. The cutting system that performs one or more cutting operations on the extracted muntin bar stock so as to fabricate one or more individual muntin bars from the extracted muntin bar stock.

A welded shaped steel manufacturing device includes: a plate conveying device configured to convey a web member and two flange members in a conveyance direction; and a laser welding device configured to laser-weld butt portions of ends of the web member butting against the two flange members for weld-bonding, wherein the plate conveying device includes a web member holding device having surface side rollers arranged at intervals in the conveyance direction in a position not to block laser irradiation from the laser welding device toward welding points, and wherein the web member is held with the surface side rollers over a predetermined range in the conveyance direction, and wherein side ends of the surface side rollers facing the two flange members are positioned along boundaries of areas having spatters dispersed from the welding points in a degree exceeding a predetermined value.

A prefabricated column assembly includes a hollow tubular column having a longitudinal axis. A gusset plate assembly includes a plurality of gusset plates connected to the column and extending laterally outward from the column in planes generally parallel to the longitudinal axis of the column. A first pair of the gusset plates extends laterally outward from the column along a first axis and defines a space for receiving an end portion of a first beam for mounting the first beam on the first pair of gusset plates. A second pair of the gusset plates extends laterally outward from the column along a second axis that is nonparallel and non-coincident with the first axis. The second pair of gusset plates defines a space for receiving an end portion of a second beam for mounting the second beam on the second pair of gusset plates to provide a bi-axial joint connection.

In the present disclosure, friction stir welding tools having probes and stationary shoulders are disposed at corners between a first workpiece and a second workpiece. A welding device main body includes axially perpendicular movement units for moving spindle units, which hold the respective friction stir welding tools on a frame, in directions perpendicular to rotary shafts of probes, and axial movement units for moving the spindle units in directions parallel to the rotary shafts of the probes.

A laser-welded shape section steel includes a web member and a flange member each made of a steel plate, the steel plate having an equivalent carbon content C.sub.eql of not less than 0.075 and not more than 0.15, the equivalent carbon content C.sub.eql being represented by the following formula: C.sub.eql=C+(Si/50)+(Mn/25)+(P/2)+(Cr/25)+Ti, where a welded part, which is a joint part in which the web member and the flange member are joined, has a hardness of not less than 1.2 times and not more than 4 times as hard as that of the steel plate, and the welded part a protrusion length of not greater than 1 mm.