A welding device for automatically welding a workpiece by a welding robot using a welding wire includes a welding control device that controls operation and welding work of the welding robot. The welding control device includes a sensing unit configured to detect a position of the workpiece, a root gap calculating unit configured to determine a root gap, and a storage unit including wire melting information as a database of a proper welding current corresponding to a feeding rate for each of the welding wire. A lamination pattern and a welding condition are provided in accordance with the root gap determined by the root gap calculating unit and the wire melting information so that an amount of heat input is equal to or less than a predetermined amount of heat input.

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 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.

An example system includes: a hand-held welding tool that is manually placed in a welding position, wherein the hand-held welding tool is configured to be activated to cause a contact tip or a welding heat source to automatically move from a first position and to second position during a welding operation, and wherein a welding arc is automatically and repeatedly turned off and on while the contact tip or the welding heat source moves from the first position to the second position to make a plurality of welds between the first position and the second position, wherein, as a travel speed decreases, a time period between each arc on time increases to make equally spaced welds.

Provided is a welding-type power source, comprising power conversion circuitry configured to convert input power to welding-type power, a user interface comprising a first input device, a second input device, and an output device, and control circuitry. The control circuitry is configured to, in response to a first input via the first input device, control the output device to output an indication that the welding-type power source is in a preconfigured state, set predetermined ones of welding-type parameters to respective predetermined values, set a welding current, when there is an input from the second input device, to a value indicated by the second input device, and set the welding current, when there is not an input from the second input device, to one of: the default value when the default welding current has not been changed, or a welding current that has been changed previously via the second input device.

Provided is a welding-type power source, comprising power conversion circuitry configured to convert input power to welding-type power, a user interface comprising a first input device, a second input device, and an output device, and control circuitry. The control circuitry is configured to, in response to a first input via the first input device, control the output device to output an indication that the welding-type power source is in a preconfigured state, set predetermined ones of welding-type parameters to respective predetermined values, set a welding current, when there is an input from the second input device, to a value indicated by the second input device, and set the welding current, when there is not an input from the second input device, to one of: the default value when the default welding current has not been changed, or a welding current that has been changed previously via the second input device.

An automated welding system includes a mounting platform configured to receive an object, a welding tool, an imaging device configured to acquire at least one image associated with the object, and a controller. The controller is configured to receive the at least one acquired image, analyze at least one pixel in the at least one acquired image, identify, based upon the analyzing, an area to be welded in the at least one acquired image, wherein the area to be welded includes a defect, and generate, based upon the identifying, control instructions for controlling at least one of the mounting platform and the welding tool to weld the area to be welded.

A welding apparatus comprises support members adapted to support parts to be welded, a slit being defined between planes of the support members to expose the parts to be welded. A linear actuator unit having a carriage linearly displaceable along the slit. A welding unit is mounted to the carriage having a torch located substantially below the planes of the support members, and is adapted to be in proximity to the parts via the slit to transmit current to the parts to weld same.

A teaching system rewinds a welding wire in accordance with a detection that a tip of a welding wire contacts a teach subject, and feeds the welding wire in accordance of a non-detection that the tip of the welding wire contacts the teach subject. Furthermore, the teaching system, if a current protruding length of the welding wire is less than a predetermined length, moves a robot in a direction away from the teach subject, and, if the current protruding length is greater than the predetermined length, moves the robot in a direction closer to the teach subject. The teaching system, if a determination that the current protruding length is equal to the predetermined length, stops feeding and rewinding of the welding wire and stops the robot, and stores a stop position of the robot as a teaching position.

A welding device according to some embodiments includes a rotary table fixing two irregular shaped plates which are overlapped, a torch unit including a welding torch positioned to face outer peripheral edges of the two irregular shaped plates fixed to the rotary table, a torch actuator configured to move the welding torch toward and away from the outer peripheral edges, an after-shielding part mounted to the welding torch on downstream side in a rotational direction of the rotary table and having nozzles arranged along the rotational direction, configured to jet shielding gas to the outer peripheral edges, and including a first nozzle positioned upstream and a second nozzle positioned downstream of the first nozzle in the rotational direction, and a controller configured to control an orientation of the nozzle in a direction of decreasing a shielding-gas-jetting distance between the second nozzle and the outer peripheral edges welded by the welding torch.