A cap dispenser for a welding gun includes a sleeve that slidably receives a drawer that is configured to house a column of weld caps. The cap dispenser also includes a spring that cooperates with a slide block that is arranged in the drawer. The spring urges the slide block toward an aperture in the drawer that is configured to receive a welding gun electrode.

A cap extractor for a welding gun includes a housing, a pair of springs, and first and second arms that are arranged between the springs. Each of the first and second arms have teeth that are configured to engage a welding cap. The first and second arms are configured to move relative to the housing in first and second directions that are transverse to one another by deflecting the springs.

An apparatus includes a welding electrode and a holder with a primary electrical connection for carrying a welding current. The electrode and the holder may separate easily due to a weak interference fit of the primary electrical connection. Bare hands may provide sufficient force for separation. The electrode and the holder may be configured for self-alignment. A quick-release mechanism may prevent unintentional dislodgement of the electrode from the holder and include a rotation-resistant device for preventing electrode rotation. A secondary electrical connection may be included to supplement or replace the primary electrical connection. A workpiece clamping force, traditionally intended for clamping the electrode to a workpiece, may also be utilized to enable the secondary electrical connection.

A swing arm assembly is provided for a spot welding machine. The swing arm assembly can accommodate a tip dresser or a tip exchanger and can include a lift assembly that can translate the tip dresser from a first position to a second position along a lateral axis.

A swing arm assembly includes a tip dresser, a flange, and a swing arm. The flange is coupled with the tip dresser. The swing arm includes a mounting base and an arm assembly. The arm assembly includes an arm, an extendible arm mount, and a head. The arm is coupled with the mounting base. The extendible arm mount is disposed within the arm and is slidable with respect to the arm along a first axis between a retracted position and an extended position. The head is mounted to the extendible arm mount and includes a support plate and an actuator. The actuator is coupled with the support plate. The tip dresser is coupled with the support plate. The actuator is operably coupled with the flange to facilitate selective sliding of the tip dresser with respect to the support plate.

A cap dispenser for a welding gun includes a sleeve that slidably receives a drawer that is configured to house a column of weld caps. The cap dispenser also includes a spring that cooperates with a slide block that is arranged in the drawer. The spring urges the slide block toward an aperture in the drawer that is configured to receive a welding gun electrode.

A device for twisting-off and stripping an electrode cap from an electrode cap receptacle of an end of a welding gun of a welding robot, the device comprising a cap twisting-off unit and further comprising a stripping device. The stripping device is arranged along an insertion path for an electrode cap receptacle with an electrode cap as seen in front of the cap twisting-off unit and along a discharge path for an electrode cap receptacle without or with electrode cap as seen from behind the cap twisting-off unit. The stripping device can be for use in combination with the cap twisting-off unit.

In the present disclosure, a pair of removing members (5) are provided to be able to move toward and away from each other. Each of the removing members (5) includes a nail (5A, 5B) capable of being inserted into a gap (S1) between a large diameter portion (11a) and an electrode tip (12), and a protrusion (54) extending in a direction intersecting with a direction of insertion of the nail (5A, 5B) into the gap. The protrusions (54) of one and the other one of the removing members (5) are axially supported respectively by first and second support portions (81a, 81b) provided on one end of an arm member (8). The first support portion (81a) is in the shape of a groove that is shaped to be gradually closer to the other one of the removing members as progressing toward the other end of the arm member (8).

A cutter includes a rake face on which a recessed groove extending along a direction of a rotation axis of a rotary holder to be open at a flank face of the cutter are formed. The recessed groove includes a plurality of recessed grooves formed at predetermined intervals along a direction intersecting with the rotation axis. A cutting blade portion extending along a direction intersecting with the rotation axis is provided on a continuous portion of the rake face and the flank face. The cutting blade portion includes a first region made up of an intersecting portion of the rake face and the flank face and a second region made up of a peripheral edge portion of an opening portion of the recessed groove at the flank face.

A first electrode coolant path is configured to cool a first welding electrode by liquid coolant flowing from a supply path through the first electrode coolant path to a return path. A second electrode coolant path is configured to cool a second welding electrode by liquid coolant flowing from the supply path through the second electrode coolant path to the return path. Three or more valves are configured to stop or reduce liquid coolant flow through the first or second electrode coolant path and configured to stop or reduce liquid coolant backflow from the return path when the first or second welding electrode is at least partially detached. At least one valve is coupled in the first or second electrode coolant path. A drawback apparatus generates a suction force to draw liquid coolant away from a gap formed when the first or second welding electrode is at least partially detached.