A stud feed assembly for welding studs comprising a stud loader and a stud catcher. The stud loader comprises a first chute component and a second chute component, the first chute component having a greater diameter than the second chute component. The stud catcher comprises a receiving component and a vertical component, the receiving component being shaped to receive it stud such that the receiving component aligns the received stud in a substantially vertical position.

A method for carrying out a stud joining process by a tool performing a working step on a workpiece and the working step is carried out while taking into account at least one parameter value which is selected from a set of values, and the working step is to be carried out at a certain position on the workpiece, and the position determines the parameter value. The method comprises the steps of: storing the parameter value for the position in an RFID transponder; locating the RFID transponder on the workpiece in the region of the position before the working step is carried out, reading the parameter value out from the RFID transponder with an RFID communication device associated with the tool.

A device and a method for position measurement for welding guns, wherein based on the inductance of the coil, which changes depending on the insertion depth of the welding stud into a solenoid coil, it is inferred how far the welding stud is inserted into the solenoid in order to allow conclusions to be drawn concerning a proper arrangement of the welding stud relative to the workpiece.

Devices and systems are disclosed herein for drawn arc stud welding. These systems and devices are extremely portable (<50 lbs.), deliver enough power for up to diameter studs, and include a charging circuit, an energy storage device comprising a plurality of low ESR ultracapacitors, and a discharge circuit. The systems and devices can include a lithium nickel manganese cobalt oxide (LiNiMnCoO.sub.2) battery to supply the energy storage device with about 20 to about 30 amps of current between welding operations.

Devices and systems are disclosed herein for drawn arc stud welding. These systems and devices allow welding operations while reducing the peak power draw of the input source, and include a charging circuit, an energy storage device comprising a plurality of low ESR ultracapacitors, and a discharge circuit.

An ergonomic method for a composite floor structure with metal decking having ribs and flat sections with openings in the flat sections over the center of the I-beams for fastening and flattening the decking on the I-beams, removing contaminates from the I-beams through the openings to form a clean welding zone and welding studs in the clean welding zones. Tools for fastening, removing contaminates and welding are carried by carts having a bottom frame with rollers and an outrigger that keeps a working end of the tool perpendicular to the composite floor structure. In operation as the carts are rolled over the metal decking the rollers contact the ribs while other rollers extend over and free from contacting the flat sections. The carts have a tool balancer to minimize the effort required of a worker to raise and lower the tool into working position from an upright position.

A portable stud welder apparatus is provided for welding a stud onto a work piece. The portable stud welder apparatus includes a housing and an energy storage device. A weld stud gun that is configured to hold a weld stud is electrically connected to the energy storage device for receiving energy from the energy storage device to pass a current through the stud and the work piece to form a weldment. At least one battery of the lithium ion type that is removeably coupled to the housing to establish an electrical connection with said energy storage device and provide energy to the energy storage device.

A welding device is provided for welding a welding stud to a substrate along a welding axis in a welding direction, the welding device comprising a shielding element with an end face which points in the welding direction and which projects beyond the rest of the welding device in the welding direction, wherein the end face has an end face diameter transversely with respect to the welding direction, furthermore comprising a holding device for holding the welding stud within the shielding element during a welding operation, wherein the holding device has a stud receptacle with an inner diameter, wherein the end face diameter of the end face amounts to at most 3 times the inner diameter.

The present disclosure relates to a fastening loop welding method according to the present disclosure, which is a stud welding method for a fastening loop, including mounting a fastening loop chuck on a stud gun; inserting the fastening loop into the fastening loop chuck; setting a welding condition for the stud gun; and welding the fastening loop to a welding target.