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.

The invention relates to a spot welding cap changer (1) with a cap puller (2) and two cap magazines (3, 3A), the cap puller (2) having a gripper (20) with spring-loaded, pivotable jaws (21, 22), which in response to a turning and axial pulling-off movement detaches a spot welding cap (K) of a pincer spot welding head introduced into it from a shaft of the pincer welding head in such a way that it is clamped to prevent it twisting, and the cap magazines (3, 3A) holding spot welding caps respectively in a round cap carrier (31) such that they are circularly arranged in a directed and oriented manner and are respectively transported individually one after the other into an access position against a stop (32) by an advancing force (P).

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.

The present invention relates to a cap tip detachment device capable of detaching cap tips 60 which are fitted at the end of the shanks 50 of a welding device. A pair of nail mounting boards 3 and 4, which mounts a fixed nail 8 and a movable nail 12, and a slider 5, which is located between the nail mounting boards, are arranged on a linear rail 2. The movable nail 12 of the pair of nail mounting boards 3 and 4 includes an arm 14 extending toward an opposite side of a pivot shaft 11, and a spring 16 that elastically urges the arm 14 in a direction of separating from the nail mounting board 3 and 4; and a distal end of each arm is abutted against the slider 5. When a shank 50 is pushed against the fixed nail 8 of one nail mounting board 3 by a robot, the movable nails 12 of both nail mounting boards 3 and 4 open allowing the cap tip 60 to be detached.

An apparatus for supplying a welding tip of a welder and an apparatus for replacing the same include a fixed bracket secured to a support. The apparatus includes an actuator coupled to the fixed bracket and a first moving member moved by the actuator. A second moving member is coupled to the first moving member and hingedly coupled to the fixed bracket. A third moving member is hingedly coupled to the second moving member. A first welding tip removal member is coupled to the third moving member to separate a welding tip coupled to a shank. A fourth moving member is disposed opposite to the first moving member. A fifth moving member is coupled to the fourth moving member and hingedly coupled to the fixed bracket. A sixth moving member is coupled to the fifth moving member. A second welding tip removal member is coupled to the sixth moving member.

An apparatus for supplying a welding tip of a welder and an apparatus for replacing the same include a fixed bracket secured to a support. The apparatus includes an actuator coupled to the fixed bracket and a first moving member moved by the actuator. A second moving member is coupled to the first moving member and hingedly coupled to the fixed bracket. A third moving member is hingedly coupled to the second moving member. A first welding tip removal member is coupled to the third moving member to separate a welding tip coupled to a shank. A fourth moving member is disposed opposite to the first moving member. A fifth moving member is coupled to the fourth moving member and hingedly coupled to the fixed bracket. A sixth moving member is coupled to the fifth moving member. A second welding tip removal member is coupled to the sixth moving member.

Disclosed is an apparatus for replacing a welding tip for spot welding. In an exemplary embodiment of the present invention, the apparatus for replacing a welding tip for spot welding includes a post installed in a workplace having a spot welding machine with upper, and lower welding guns provided thereto, a base plate mounted on a top of the post, a welding tip removing unit mounted on one side of an upper side of the base plate for clamping and removing a spent welding tip mounted to the upper welding gun or the lower welding gun by operation of a cylinder, a holder unit mounted on the upper side of the base plate spaced from the welding tip removing unit, and a welding tip cassette mounted to the holder unit in a state new welding tips to be mounted to the upper, and lower welding guns are set in an upper side and a lower side thereof.

Disclosed are an apparatus for supplying a welding tip of a welder and an apparatus for replacing the same, which can automatically supply or replace a welding tip of a welding robot that is used in a vehicle body production factory, etc. The apparatus for replacing a welding tip of a welder of the present invention comprises: a fixed bracket secured to a support; an actuator coupled to the fixed bracket; a first moving member that is moved by the actuator; a second moving member coupled to the first moving member and hingedly coupled to the fixed bracket; a third moving member hingedly coupled to the second moving member; a first welding tip removal member coupled to the third moving member to separate a welding tip coupled to a shank; a fourth moving member that is moved by the actuator and is disposed opposite to the first moving member; a fifth moving member coupled to the fourth moving member and hingedly coupled to the fixed bracket; a sixth moving member coupled to the fifth moving member; and a second welding tip removal member that is coupled to the sixth moving member and moves in relation to the first welding tip removal member.

A dummy weld apparatus including a dummy weld gun which allows a direct weld robot with a conventional weld gun to clamp down on the dummy weld gun to apply force and weld current for performing welding of workpieces of a first composition (e.g., aluminum). This arrangement allows the current provided by the conventional weld gun to flow through the dummy weld gun for welding the workpieces using weld tips dedicated to welding parts of the first composition, but also allows the dummy weld gun to be removed from the conventional weld gun to allow the conventional weld gun to performing welding operations on workpieces of a second composition (e.g., steel) using the original welding tips of the weld gun, avoiding material contamination of the tips.

A head for a swing arm assembly is provided for a spot welding machine. The head can accommodate a tip dresser or a tip exchanger.