A welding gun includes: a moving mechanism portion (ball screw mechanism) for moving a movable electrode back and forth; a motor that includes a rotor and drives the moving mechanism portion to move the movable electrode back and forth; and a brake mechanism that prevents rotation of the rotor during a braking operation, wherein the brake mechanism includes an annular brake disc that is attached to an outer peripheral surface of the rotor and rotates integrally with the rotor, and a clamping portion that prevents rotation of the brake disc by clamping the brake disc during the braking operation.

An apparatus or actuator system having a motor, a housing and a thrust rod or thrust tube, where the actuator is configured to convert rotational motion of the motor into axial motion of the thrust tube for axial motion of a tool coupling therewith. A guide assembly is coupled to the actuator housing, extending along an axis thereof. The guide assembly comprises a guide shaft and a coupling between the guide shaft and the thrust tube, and is configured to provide positional stability for the tool coupling when positioned along the actuator axis by motion of the thrust tube.

An apparatus includes a housing, a pin, a mechanism and a sensor. The housing is configured to receive a weld head. The pin is configured to move linearly relative to said housing. The mechanism is configured to convert a position of said pin into a displacement. The sensor is configured to generate a value representative of said position of said pin based on said displacement.

The present invention provides a low-voltage high-current light-weight spot welding machine, comprising: a welding power supply device, wherein the welding power supply device comprises a casing, a first electrode and a second electrode; a movable arm assembly, comprising a movable arm and at least one nut flange, wherein an end of the movable arm is connected with the at least one nut flange; at least one connection block, provided in between the first conductivity block and the first electrode; a drive assembly, wherein a drive rod of the drive assembly is connected with the at least one nut flange, the drive rod is located at a bottom portion of the casing; a static arm, wherein the static arm is connected with the second electrode via a second conductivity bridge, and the lateral connection plates are rotatably connected at the at least one flange structure; wherein, by connecting the movable arm assembly, the at least one connection block, the drive assembly and the static arm with the lateral connection plates, a bearing connection mechanism of the welding tong of a spot welding machine is formed and the bearing connection mechanism is integrally connected with the welding power supply device. In the present invention, the structural design of the movable arm and the static arm is tight, the welding tongs are designed to be small-sized, detachment between the welding tongs and the welding power supply devices can be done easily and rapid swift of the two kinds of welding tongs can be realized.

An apparatus includes a housing, a pin, a mechanism, and a sensor. The housing is configured to receive a weld head. The pin is configured to move linearly relative to said housing. The mechanism is configured to convert a position of said pin into a displacement. The sensor is configured to generate a value representative of said position of said pin based on said displacement.

Welding tongs (1), especially X-welding tongs (1) for resistance spot welding, with a first tong arm (11), a second tong arm (12), and a drive unit (2) comprising a motor (4) and a gearing (6) for rotating the first tong arm (11) relative to the second tong arm (12) about an axis of rotation (14) of the welding tongs (1), wherein the motor (4) and the gearing (6) are arranged coaxially and the second tong arm (12) is fastened to the housing in an abutment plane (29), which is situated on the motor side of an outer driven bearing plane of the drive unit (2).

A welding gun equipped with a retaining unit, which includes a first retaining member and a second retaining member, and retains a stationary gun arm and a movable gun arm. A retaining hole for retaining the stationary gun arm, guide grooves for insertion of rolling members provided on an arm holder that retains the movable gun arm, connecting member insertion holes into which connecting members connecting the first retaining member and the second retaining member are inserted, and a retained member insertion hole for inserting a retained member retained by a moving member that moves the retaining unit to a welding operation location, are formed in the first retaining member and the second retaining member, and the regions where these components are formed are set as thick-walled regions having a greater thickness than other regions. Thus, adequate rigidity is ensured while avoiding an increase in weight.

A device includes: a measurement operation execution unit that controls a mobile machine to execute a measurement operation for moving a welding tip in a first direction to a measurement location; a location data acquisition unit that acquires the location of the mobile machine when the measurement operation has been executed; and a measurement initiation location determination unit that determines, as a measurement initiation location, a location for the mobile machine at which the welding tip is arranged at a prescribed distance apart from a first location in a second direction, which is opposite of the first direction, based on the first location which is acquired during a first measurement operation. During a second measurement operation, the measurement operation execution unit controls the mobile machine to position the mobile machine at the measurement initiation location and then move the welding tip in the first direction.

A weld head for spot welding two or more components together. The weld head includes first and second electrode assemblies and a linear actuator motor to drive the first electrode assembly into a desired position and apply a desired clamping force. The weld head may include a sensor configured to measure a temperature of the motor and a controller configured to monitor the temperature and adjust the current supplied to the motor to maintain the desired clamping force. The weld head may include linear encoder to measure the position of the linear actuator motor and an algorithm that correlates the position of the motor with a force constant of the motor. Based on the position of the motor and the corresponding force constant of the motor, the controller is configured to adjust the current supplied to the motor to maintain the desired clamping force.

An electronically-controlled electric resistance welding head and method having a support structure and the electrodes located on the same side. The welding head including a ground electrode having an elastic device and a detecting device for detecting a force load on the elastic device on contact with a component to be welded. A welding electrode is movable relative to the ground electrode and the support structure to contact the component to be welded. An electronic control unit is operable to selectively increase the force applied by each electrode when in contact with the component to be welded until respective threshold values are achieved. Current is generated by a transformer for passage to the electrodes.