Provided are a projection welding device and an electrode cleaning method for the same with which it is possible to keep a stud holding hole formed in a welding electrode clean. A projection welding device welds a stud to a workpiece by holding the stud using a second electrode, bringing the stud into contact with the workpiece, and causing a welding current to flow through the second electrode, wherein the second electrode includes a stud holding hole which extends from a cap opening formed in the distal end, to a bottom portion formed on the base end side, and at least one lateral hole which extends from a side wall opening formed in a side wall to the bottom portion, and the projection welding device is provided with a stud supply device which ejects air into the stud holding hole from the cap opening of the second electrode.

Device (10) for manufacturing a component compound by resistance welding, comprises a welding electrode (12) for transmitting an electric current to a joining element (17) and for exerting a joining force onto the joining element (17) along a joining direction (22) in order to establish a connection of the joining element (17) with a structural element by resistance welding; as well as a positioning device (20) for positioning at least one joining element (17) on the axis of the joining direction (22) in order to contact and particularly apply a force to the joining element (17) by means of the welding electrode (12). The positioning device (20) comprises a retention device (30) for exerting a retention force onto the joining element (17), wherein the retention device (30) is movably arranged.

An electrically conductive tip member includes: an inner periphery portion including a Cu matrix phase and a second phase that is dispersed in the Cu matrix phase and contains a Cu—Zr-based compound, the inner periphery portion having an alloy composition of Cu-xZr (where x is the atomic percentage of Zr and satisfies 0.5≤x≤16.7); and an outer periphery portion that is present on an outer circumferential side of the inner periphery portion, made of a metal containing Cu, and has higher electrical conductivity than the inner periphery portion.

A main body and an end cover are made of metal. A major diameter hole and a minor diameter hole that communicates with a through hole of the end cover are provided in a heat insulating guide sleeve inserted into the main body. A cooling water passage is formed in the heat insulating guide sleeve. A portion of the heat insulating guide sleeve located at an inner side of the cooling water passage serves as a heat insulating portion. A container of a permanent magnet is slidably inserted into the heat insulating portion. A magnetic force transmission member is slidably inserted into the minor diameter hole. The permanent magnet, the heat insulating portion, and the cooling water passage are arranged in a diameter direction of the main body. A depth dimension of the cooling water passage is smaller than a thickness dimension of the heat insulating portion.

A main body and an end cover are made of metal. A major diameter hole and a minor diameter hole that communicates with a through hole of the end cover are provided in a heat insulating guide sleeve inserted into the main body. A cooling water passage is formed in the heat insulating guide sleeve. A portion of the heat insulating guide sleeve located at an inner side of the cooling water passage serves as a heat insulating portion. A container of a permanent magnet is slidably inserted into the heat insulating portion. A magnetic force transmission member is slidably inserted into the minor diameter hole. The permanent magnet, the heat insulating portion, and the cooling water passage are arranged in a diameter direction of the main body. A depth dimension of the cooling water passage is smaller than a thickness dimension of the heat insulating portion.

Systems and methods are provided for exchanging electrode tips, e.g., electrode tips used in resistance spot welding, and disposing of used/unusable electrode tips. Used/unusable electrode tips may be collected, e.g., while within an assembly line. Such used/unusable electrode tips may be routed to a receptacle(s) reside outside the assembly line. Accordingly, disposing or removing of the used/unusable electrode tips can be accomplished without stopping the assembly line, and decreasing any chance for safety events.

A resistance welding device is configured for use in combination with a resistance welder having a translating welding electrode. A first arm of the welding device is in a translating rotational engagement with a second arm thereof. The first arm of the device is engageable to a translating electrode from the resistance welder. Translation of the welding electrode of the resistance welder moves first and second electrodes to contact metal therebetween and spot weld the metal.

A single side heating apparatus equipped with a pair of electrodes for heating a workpiece is provided. The apparatus includes: a base portion; the pair of electrodes each having a contact portion configured to contact with the workpiece in one direction continuously or at a plurality of spaced-apart portions thereof; an electrode holder, to which the pair of electrodes are fixed; and a four-bar linkage provided between the base portion and the electrode holder and configured to rotate to tilt the electrode holder around an axis orthogonal to the one direction by a reaction force received by the electrodes from the workpiece. The four-bar linkage includes a first link located closer to the electrode holder, a second link located closer to the base portion, and third and fourth links. The first link is shorter than the second link, and the third link and the fourth link are equal in length.

A guide pin made of a heat-resistant hard material and a sliding member made of an insulating synthetic resin material are integrated. An inserted portion and an extended portion are provided in the sliding member. The thickness of the extended portion is set to be thinner than the thickness of the inserted portion. An air passage is formed in the extended portion thereby forming a thin-wall deformable portion. The surface of the thin-wall deformable portion is configured to bulge toward the air passage side when the extended portion is thermally expanded.

A replacing and holding device includes an electrode tip puller including two stacked pick plates inserted between an end face of an electrode tip fitted into a shank fixed to a gun arm of a welding gun and an end face of a larger diameter portion of the shank, a guide rod that guides motions of the pick plates in a stacked direction thereof, a pick plate interspace increasing mechanism that increases a space between the pick plates according to positions of the pick plates along the guide rod, an electrode tip holder in one of the pick plates to hold the electrode tip pulled out from the shank, and an electrode tip contact portion in front of the shank in an insert direction of the shank, wherein the electrode tip comes into contact by a motion of the welding gun to insert the shank into the electrode tip.