Features herein relate to an electric arc welding method for creating a multi-pass welded joint comprising the following steps: a first stand-alone toe weld on a first construction element, then, arranging the first construction element and a second construction element in a joining position, with a distance being present between the first stand-alone toe weld and a root area of the welded joint to be created, while maintaining the joining position, making a first weld connection between the first construction element and the second construction element by applying a root pass at the root area, then, applying one or more filling beads, wherein the first stand-alone toe weld, the root pass and the one or more filling beads together form part of the welded joint, wherein the first stand-alone toe weld forms the toe of said welded joint at the side of the first construction element.

According to some embodiments, there is provided a welding device for welding outer peripheral edges of two irregular shaped plates which are overlapped, including: a rotary table to which the two irregular shaped plates in an overlapped state are fixed; a torch unit, including a welding torch positioned to face the outer peripheral edges of the two irregular shaped plates fixed to the rotary table; a first torch actuator, capable of changing an orientation and a distance of the welding torch relative to the outer peripheral edges; and a first controller, configured to control the first torch actuator, so that the orientation of the welding torch relative to a tangential line of the outer peripheral edges and the distance of the welding torch from the outer peripheral edges are kept constant along a circumferential direction of the outer peripheral edges, during rotation of the two irregular shaped plates.

According to some embodiments, there is provided a welding device for welding outer peripheral edges of two irregular shaped plates which are overlapped, including: a rotary table to which the two irregular shaped plates in an overlapped state are fixed; a torch unit, including a welding torch positioned to face the outer peripheral edges of the two irregular shaped plates fixed to the rotary table; a first torch actuator, capable of changing an orientation and a distance of the welding torch relative to the outer peripheral edges; and a first controller, configured to control the first torch actuator, so that the orientation of the welding torch relative to a tangential line of the outer peripheral edges and the distance of the welding torch from the outer peripheral edges are kept constant along a circumferential direction of the outer peripheral edges, during rotation of the two irregular shaped plates.

To provide an arc welding robot system that displays a current waveform graphically during arc welding and realizes parameter adjustment on a display screen. An arc welding robot system comprises a robot controller and a teaching operation terminal. The robot controller comprises: an arc sensor; and a welding current storage unit that stores the current value of a welding current detected by the arc sensor during implementation of the arc welding. The teaching operation terminal comprises: a control unit; and a display on which data is displayed. The control unit comprises: a welding current display unit that displays the current value and the waveform of the welding current in any weaving cycle on the display; a sampling current area display unit that displays a sampling current area on the display; and a current waveform display shift unit that shifts the waveform of the welding current in a temporal axis direction on the display unit.

To provide an arc welding robot system that displays a current waveform graphically during arc welding and realizes parameter adjustment on a display screen. An arc welding robot system comprises a robot controller and a teaching operation terminal. The robot controller comprises: an arc sensor; and a welding current storage unit that stores the current value of a welding current detected by the arc sensor during implementation of the arc welding. The teaching operation terminal comprises: a control unit; and a display on which data is displayed. The control unit comprises: a welding current display unit that displays the current value and the waveform of the welding current in any weaving cycle on the display; a sampling current area display unit that displays a sampling current area on the display; and a current waveform display shift unit that shifts the waveform of the welding current in a temporal axis direction on the display unit.

A multi-pass welding method is provided for minimizing bead sagging and forming a welded joint having a good weld metal surface, even during multi-pass welding in a horizontal orientation, and a multi-pass butt welded joint and a lamination pattern calculation method for a multi-pass weld formed by the method. The weld metal has a plurality of layers from the rear surface of a base material to the front surface thereof. The plurality of layers include a finishing layer having at least two layers including an end layer; and a ground layer for forming the finishing layer. A boundary layer, which is the layer of the ground layer adjacent to the finishing layer, is formed such that the position of an upper plate-side weld is closer to the front surface of the base material than the position of a lower plate-side weld.

A multi-pass welding method is provided for minimizing bead sagging and forming a welded joint having a good weld metal surface, even during multi-pass welding in a horizontal orientation, and a multi-pass butt welded joint and a lamination pattern calculation method for a multi-pass weld formed by the method. The weld metal has a plurality of layers from the rear surface of a base material to the front surface thereof. The plurality of layers include a finishing layer having at least two layers including an end layer; and a ground layer for forming the finishing layer. A boundary layer, which is the layer of the ground layer adjacent to the finishing layer, is formed such that the position of an upper plate-side weld is closer to the front surface of the base material than the position of a lower plate-side weld.

One aspect provides a method, including: storing an infrastructure project summary report with one or more other infrastructure project reports pooled in a database of project summary reports; the infrastructure project report being prepared via accessing fluid conveyance infrastructure summary data describing a condition of a fluid conveyance infrastructure segment; and using a processor of an electronic device to match the infrastructure project summary report with one or more other infrastructure project reports pooled in the database of project summary reports. Other aspects are described and claimed.

Systems and methods for depth measurement are described herein. A depth measurement device may comprise a first light source configured to direct a first beam of light, a second light source configured to direct a second beam of light, and a mirror. The mirror may be for viewing at least one of the first beam of light and the second beam of light. The depth measurement device may further comprise a housing. The depth measurement device may further comprise an eyepiece. The first beam of light and the second beam of light may be configured to intersect at a desired location. The eyepiece may be configured to maintain a consistent line-of-sight between the eyepiece, the mirror, and the desired location. In various embodiments, the second beam of light may be oriented at an acute angle with respect to the first beam of light.

A welding apparatus includes a multi-axis robotic arm having a first end; a welding tool attached to the first end; an image acquisition device attached to the first end and having a light filtering system; the image acquisition device is configured to monitor a welding target and to provide an image of the welding target to an operator; a control unit is configured to control the robotic arm and the welding tool; an input interface for a human operator is associated to the control unit and is configured to provide an input signal to the control unit and to control the robotic arm and welding tool substantially in real time.