Handheld welding gun for welding an element to a component comprising a linear actuator unit with a linear actuator housing and a linear actuator rod adapted to actuate the holding unit in order to move the element between the lift position and the plunge position, the linear actuator rod extending partly inside and partly outside the linear actuator housing. A displacement measuring system communicates with a control card. The linear actuator, the displacement measuring system and the control card are connected together to form a compact actuator unit.

A setting head for a joining device, such as a press or a setting device, which setting head comprises the following features: a punch which is movable in a longitudinal direction such that a joining element can be joined into a component by means of a punch face arranged at a working end of the punch; a hollow cylindrical receiving sleeve which has a through-passage and which, with the punch in the through-passage, is guided adjacent to the working end of the punch concentrically and axially movably thereon; and two mutually opposite holding arms arranged on the receiving sleeve outside the through-passage each provide at least one laterally inwardly projecting holding end, with the result that the at least two holding ends allow the joining element to be releasably positionable adjacent to a punch-remote outlet opening of the through-passage and by the axially movable working end of the punch.

An apparatus for welding a welding stud to a specified location of a base material, comprising a stud holder, comprising an inert gas cover, which surrounds the stud holder while forming a gap between the stud holder and the inert gas cover, and comprising a projection device, which is intended to project a visual pattern onto the base material through the gap.

An apparatus for welding a welding stud to a specified location of a base material, comprising a stud holder, comprising an inert gas cover, which surrounds the stud holder while forming a gap between the stud holder and the inert gas cover, and comprising a projection device, which is intended to project a visual pattern onto the base material through the gap.

Provided are a three-dimensional shaped object production device and method capable of producing a predetermined three-dimensional shaped object by forming a ball at a leading end of a conductive wire through use of the conductive wire based on scanned data or designed data and aligning and stacking the balls. The three-dimensional shaped object production device includes: a plate (40), on which a three-dimensional shaped object is placeable; a ball forming section configured to form a ball (13) by applying high voltage between a leading end of a conductive wire (4) paid out from a leading end of a capillary (12) and a spark rod (19) and melting the leading end of the wire by discharge energy; a positioning device configured to position the plate and the ball forming section by moving the plate and the ball forming section relative to each other; and a bonding section configured to bond the ball formed at the leading end of the capillary to another ball (14) that has already been stacked on the plate, the forming of the ball by the ball forming section, the relative moving of the plate and the ball forming section by the positioning device, and the bonding of the ball formed at the leading end of the capillary to the another ball by the bonding section is repeated, to thereby produce a three-dimensional shaped object having a desired shape.

A setting welding device is set forth for setting stud-like auxiliary joining parts in a plurality of layers of material and subjecting them to a mechanical-thermoforming process on a second layer of material and connecting them to said second layer by way of a welding operation. For this purpose, the punch is used to apply to the welding auxiliary joining part mechanical and thermal loads that follow prescribed characteristic force and current curves. Furthermore, a corresponding connecting method that can be realized with the aid of the setting welding device is also disclosed.

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 ¾″ 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.

An anchoring assembly for anchoring a liner of a cured lining material arranged to be applied in liquid form to a metal object provided with the anchoring assembly, the anchoring assembly including an elongated mounting pin and a ferrule provided at a first end thereof, wherein the pin is arranged to be mounted at the first end to the metal object, the anchoring assembly further including a plurality of spaced anchor fins connected to the pin at a second end and extending radially outward relative to the pin, wherein the ferrule includes a radially outwardly extending place holder part arranged to be held by a ferrule holder during mounting of the pin at the first end to the metal object.

A system is provided comprising a hardened stud body and an unhardened stud subunit coupled to the hardened stud body. The hardened stud body may comprise a first composition having by weight between 17% and 21% chromium, between 2.8% and 3.3% molybdenum, between 50% to 55% nickel, and between 4.75% and 5.5% niobium. The unhardened stud subunit may comprise a second composition having by weight between 20% and 23% chromium, between 8% and 10% molybdenum, at least 58% nickel, and between 3.15% and 4.15% niobium.

A fastening system for welding a welding stud in a welding direction to a substrate is provided, comprising a welding gun, which defines the welding direction, and the welding stud, wherein the welding gun has a holding device for holding the welding stud during a welding process and an outer contour, wherein the welding stud comprises a contact surface, which is provided for making contact with the substrate before and/or during the welding process, and wherein, starting from the contact surface, a tangent can be applied to the outer contour, which encloses an angle of less than 60° with the welding direction when the welding stud is held by the holding device and the contact surface is in contact with the substrate.