Abstract: A spot welding electrode removal apparatus that is compact and durable is provided. Specifically, the apparatus includes a J-shaped operating lever, and in a position adjacent to the end of the operating lever and facing the contact member, a pressing member is provided. The operating lever is pivotably supported at a portion of the operating lever closer to the end of the operating lever than the pressing member is by a portion of the rotating case adjacent to the side of the contact member. The electrode is placed between the contact member and the pressing member, and a pivotal operation of the operating lever toward the electrode allows the pressing member and the contact member to sandwich the electrode, and a further pivotal operation of the operating lever toward the electrode allows the electrode to rotate together with the rotating case, thereby removing the electrode from a shank end.

Abstract: Provided is a spot welding electrode housing apparatus having a reduced size such that an operation of mounting electrodes on a welding gun is less likely to affect a line takt time. Specifically, a rotation regulator positioned adjacent to a rotating plate in a direction of a rotation axis is configured to allow the rotating plate to abut against an electrode housed and held in a first recess or a second recess and thereby to regulate a rotation of the rotating plate toward one direction around the rotation axis when the rotating plate rotationally biased by a spiral spring toward the one direction around the rotation axis is allowed to rotate toward the other direction around the rotation axis against a biasing force of the spiral spring.

Abstract: What is provided is a tip dresser (10) capable of smoothly discharging shavings (70) by a breaker (60) provided on a cutter (40). The tip dresser includes a cutter (40) having cutting blades (47) for cutting the tip end portions (2) of a pair of electrode tips (1) and an attaching hole (50), a holder (20) to which the cutter is attached by screwing an attaching screw (55) inserted through the attaching hole, and a rotary drive portion that holds rotatably the holder. On the surface side (46) of the cutter, the breaker (60) for discharging shavings is disposed. The breaker is formed into a plate shape having an insertion hole (62) through which the attaching screw is inserted to tighten the breaker together with the cutter by an attaching screw.

Abstract: What is provided is a tip dresser (10) capable of smoothly discharging shavings (70) by a breaker (60) provided on a cutter (40). The tip dresser includes a cutter (40) having cutting blades (47) for cutting the tip end portions (2) of a pair of electrode tips (1) and an attaching hole (50), a holder (20) to which the cutter is attached by screwing an attaching screw (55) inserted through the attaching hole, and a rotary drive portion that holds rotatably the holder. On the surface side (46) of the cutter, the breaker (60) for discharging shavings is disposed. The breaker is formed into a plate shape having an insertion hole (62) through which the attaching screw is inserted to tighten the breaker together with the cutter by an attaching screw.

Abstract: A nozzle cleaner having a configuration for centering a cutter thereof with respect to a welding nozzle. The nozzle cleaner peels off sputter from an inner peripheral surface of a welding nozzle by inserting the cutter toward the inner peripheral surface of the welding nozzle, and then rotating the cutter. The nozzle cleaner includes a guide mechanism to center the welding nozzle with respect to the cutter. The guide mechanism includes an insertion-side roller unit and a cutter-side roller unit, each having a pair of guide rollers having a smaller diameter portion and a pair of enlarged diameter portions. The enlarged diameter portions guide the welding nozzle to the vicinity of the central position of the corresponding smaller diameter portion. The facing guide rollers of the cutter-side roller unit and of the insertion-side roller unit are arranged in arrangement directions orthogonal to each other, respectively.

Abstract: A tip shaping apparatus presses electrode tips against a shaping roller thereof held by a rotationally driven holder in such a manner as to bring tip sections of the tips close to each other, thereby shaping the tip sections into reusable condition. The tip shaping apparatus includes deburring sections located in such positions as to confront burrs that are formed during shaping in such a manner as to project from outer circumferences of root sections proximate the tip sections of the electrode tips in a direction perpendicular to the axes of the electrode tips, at ejection of the electrode tips from the apparatus. Each of the deburring sections is located proximate an outer circumferential plane of the root section of each of the electrode tips undergoing shaping so as to abut against and cut off or bend the burrs in such a manner as to suppress the projecting height of the burrs when the electrode tips are ejected from the tip shaping apparatus.

Abstract: A tip shaping apparatus presses electrode tips against a shaping roller thereof held by a rotationally driven holder in such a manner as to bring tip sections of the tips close to each other, thereby shaping the tip sections into reusable condition. The tip shaping apparatus includes deburring sections located in such positions as to confront burrs that are formed during shaping in such a manner as to project from outer circumferences of root sections proximate the tip sections of the electrode tips in a direction perpendicular to the axes of the electrode tips, at ejection of the electrode tips from the apparatus. Each of the deburring sections is located proximate an outer circumferential plane of the root section of each of the electrode tips undergoing shaping so as to abut against and cut off or bend the burrs in such a manner as to suppress the projecting height of the burrs when the electrode tips are ejected from the tip shaping apparatus.

Abstract: A nozzle cleaner having a configuration for centering a cutter thereof with respect to a welding nozzle. The nozzle cleaner peels off sputter from an inner peripheral surface of a welding nozzle by inserting the cutter toward the inner peripheral surface of the welding nozzle, and then rotating the cutter. The nozzle cleaner includes a guide mechanism to center the welding nozzle with respect to the cutter. The guide mechanism includes an insertion-side roller unit and a cutter-side roller unit, each having a pair of guide rollers having a smaller diameter portion and a pair of enlarged diameter portions. The enlarged diameter portions guide the welding nozzle to the vicinity of the central position of the corresponding smaller diameter portion. The facing guide rollers of the cutter-side roller unit and of the insertion-side roller unit are arranged in arrangement directions orthogonal to each other, respectively.

Abstract: A tip dresser is disclosed, by which a cutter body can be easily formed and by which an end of an electrode tip can be quickly and neatly grinded. A tip dresser, which is configured to grind a pair of electrode tips used for spot welding in a manner of approaching ends of a pair of the electrode tips to each other, includes a cutter including a holder configured to be rotationally driven with a rotation center axis matched to an axial center of each of the mutually approached electrode tips, a cutter body retained by the holder to cut vicinities of the ends of electrode tips in case the holder is rotated.

Abstract: A tip dresser is disclosed, by which a cutter body can be easily formed and by which an end of an electrode tip can be quickly and neatly grinded. A tip dresser, which is configured to grind a pair of electrode tips used for spot welding in a manner of approaching ends of a pair of the electrode tips to each other, includes a cutter including a holder configured to foe rotationally driven with a rotation center axis matched to an axial center of each of the mutually approached electrode tips, a cutter body retained by the holder to cut vicinities of the ends of electrode tips in case the holder is rotated.

Abstract: A welding robot for spot welding is disclosed. The welding robot is capable of grinding electrode tips promptly and clearly. The welding robot 1 includes a servo gun 5 provided at a front end of a multi-joint arm 2, in which a pair of electrode tips for the spot welding are installed, and a control unit 3 for controlling a servo motor 6 of the servo gun in a welding process or a grinding process of the electrode tips. A dresser 18 for grinding the pair of the electrode tips includes a servo motor 27 for rotating a grinding cutter 30. The control unit 3 controls the servo motor 27 of the dresser and controls the servo motor 6 of the servo gun in order to adjust a pressure of the pair of the electrode tips installed in the servo gun with respect to the cutter. In a finishing grinding process of the electrode tips, the speed of revolution of the cutter is increased and the pressure applied to the cutter is reduced relative to the speed and pressure applied in a rough finishing process.

Abstract: An apparatus for detecting a nugget for spot welding utilizing the magnetic after-effect which is generated when a variation in the magnetic field is applied to a nugget. The apparatus includes a driving coil, which applies a magnetic field variation to a spot-welded nugget, and a magnetism sensing element, which detects variations in magnetic flux density arising in the vicinity of the nugget as a result of the magnetic field variation. The magnetism sensing elements may be installed in an array form so as to face the nugget and the area around the nugget.