An indirect spot welding apparatus includes a welding electrode that is brought into pressure contact with one of surfaces of a plurality of plate-shaped members that are objects to be welded in one side in a stacking direction of the plate-shaped members, a ground electrode that is brought into pressure contact with the one of the surfaces in the one side or another one of the surfaces in the other side in the stacking direction in a position shifted from an axial center of the welding electrode, and an opposed member disposed coaxially with the ground electrode to be opposed to the ground electrode so as to hold at least one of the plate-shaped members between the opposed member and the ground electrode, and the welding electrode is mechanically integrated with the ground electrode to be movable in a direction parallel to an axial direction of the ground electrode.

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.

A welding gun includes a proximity restricting mechanism that is provided between a shaft and a cover member in a manner to surround the shaft and to be displaceable relative to the shaft in an axial direction in accordance with expansion and contraction of the cover member, and that restricts the cover member from approaching too closely the shaft.

An electrode moving mechanism of a welding gun includes a first mechanism portion that has a shaft, a second mechanism portion that has a housing capable of housing at least a portion of the shaft, and supports the shaft in a manner to be relatively movable in an axial direction, and a cover member that covers at least a portion of the shaft and is capable of expanding and contracting in accordance with relative displacement between the first mechanism portion and the second mechanism portion, wherein a communication path is formed that enables communication between an internal space, which is between the shaft and the cover member, and an internal space of the housing.

The present invention provides an electrode tip with which cooling efficiency can be improved, and with which a pressurization withstanding performance enabling the electrode tip to withstand pressurization during welding can be improved. An electrode tip is provided with: an electrode tip main body portion; and a support post portion which is disposed inside the electrode tip main body portion, and abuts a reverse surface side of a distal end portion of the electrode tip main body portion at least during welding pressurization, to thereby suppress displacement of the distal end portion of the electrode tip main body portion. The support post portion is formed using a material having higher values of tensile strength and Young's modulus than those of the electrode tip main body portion.

A new weld configuration is used to obtain a robust and consistent resistance weld between the tabs of an anode current collector and the casing of an electrochemical cell. This is done by adding a resistive transferable electrode tip between at least one of the welding electrodes, preferably the movable welding electrode, and the stacked parts that are being joined together. The purpose of the transferable electrode tip is to generate a sufficient amount of heat during the welding process so that the stacked parts are joined together without adding any product functionality. In one embodiment of the present invention, the transferrable electrode tip is a stainless-steel ball, the stacked anode current collector tabs are of nickel, and the cell casing is of stainless-steel.

A welding gun includes a driving-force transmission mechanism which converts linear displacement of an output unit of a driving unit into rotational displacement of a clamping arm. The driving-force transmission mechanism includes: an inclined part which is integrally displaced with the linear displacement of the output unit, and which is inclined with respect to the displacement direction of the output unit; and a part to be pressed which is pressed by the inclined part. The clamping arm rotates in accordance with movement of the part to be pressed which is pressed by the displaced inclined part, and generates clamping force.

A seam welding system includes a pair of roller electrodes. The pair of roller electrodes hold a to-be-welded object between circumferential surfaces of the roller electrodes, rotate while holding the to-be-welded object between the circumferential surfaces, and perform seam welding on the to-be-welded object when a current flows between the roller electrodes while rotating and holding the to-be-welded object between the circumferential surfaces. To an electrode movement mechanism, the roller electrodes are mounted. The electrode movement mechanism moves the roller electrodes along a welding line of the to-be-welded object. Drive sources respectively rotate the roller electrodes and a joint of the electrode movement mechanism. A controller controls an amount by which the roller electrodes rotate based on a torque change in the drive sources so as to keep torques respectively acting on the roller electrodes within a predetermined range.

An apparatus of a setting welding device for an auxiliary joining part with a head and a shaft, includes a linear drive fastenable at the setting device and including an element nest at a movable end, in which an auxiliary joining part is releasably receivable from a transfer unit. The element nest is movable by the linear drive in a first direction. The element nest is supported in a floating manner, and is positionable via a mechanical stop alignment in abutment with an electrode punch in the joining direction below the electrode punch. And/or the element nest is connected with the linear drive via a mechanical direction-changing coupling component so that the element nest is movable by the linear drive in a second direction so that the auxiliary joining part is positionable at the joining location, wherein the second direction is not parallel to the first direction.

A golf club head comprising at least one part manufactured via a metal injection molding process, and attached to another part of the golf club head via electrical resistance welding, is disclosed herein. The present invention is also directed to a method of making said golf club head, the method comprising the steps of providing a first golf club head part made from a first metal material, metal injection molding a second golf club head part from a second, different metal material, and electrical resistance welding the second golf club head part to the first golf club head part to form a combined part.