Abstract:
In one aspect, there is disclosed a drawn arc fastener welding process that includes the steps of providing a fastener positioned in a welding tool, providing a weld control, providing a work piece, contacting the fastener against the work piece, energizing a pilot current, lifting the fastener from the work piece and drawing a pilot arc, energizing a main arc for a predetermined duration, short circuiting the fastener relative to the work piece, cyclically redrawing an arc and short circuiting the fastener relative to the work piece at least one additional cycle, dynamically sensing an arc voltage and calculating a derivative signal of the voltage over time for each drawn arc and short circuit of the cycle wherein a position and motion of the fastener relative to the work piece is controlled and the energizing of the arc is controlled, and plunging the fastener into the work piece forming a weld.
Abstract:
A welding stud includes a shank and a head flange, which projects radially relative to the shank and whose outer circumference is of polygonal design in order to be able to apply a test torque (T) to the stud by means of a tool. The flange includes an annular section (16) whose front facing and radially extending annular surface is designed as a welding surface. The annular section directly adjoins the flange, and the annular section and the flange form a head section which has a uniform outside diameter (D) throughout, and wherein the polygonal shape of the flange extends over the annular section up to its front annular surface.
Abstract:
A joining device for joining a component to a workpiece. The device includes a component holder which moves the component along an axis in a first direction towards the workpiece in order to connect the component to the workpiece, and has a protective gas feed in order to carry out a welding process in a protective gas atmosphere. During the welding process the protective gas is discharged essentially in a second direction which is opposed to the first direction. An elastic sealing sleeve including folding bellows is arranged in relation to the component holder in such a way that a welding space, which is bounded by the workpiece, the component holder, the component and the sealing sleeve and through which the protective gas flows, is sealed off from the external surroundings during the welding process so that the protective gas can escape only in the second direction.
Abstract:
A method for processing parts. In one advantageous embodiment, a setoff set of studs are welded to a part to form a set of fixed studs. A set of tabs are attached to the set of fixed studs. The set of tabs are affixed to a manufacturing tool.
Abstract:
A welding stud is attachable to a workpiece at a work end portion shaped for enhanced attachment strength with the workpiece. The welding stud has a portion of reduced thickness along a body portion between the work end portion and a retaining collar. The reduced thickness portion is furnished to yield or bend in the event of contact by some other body or piece and preserve the integrity of the attachment weld. The work end portion may also have an enlarged contact face with increased surface area for forming the weld.
Abstract:
A device and a method are proposed for arc welding of elements, in particular metal studs to coated parts, in particular metal sheets, in which in a first step an element is moved relative to the part to at least partially break up the coating of the part. This produces an electrical contact between part and element, the part and the element being welded to each other in a subsequent step. The element is set in oscillating motion, at least about its lengthwise axis, in order at least partially to break up the coating of the part.
Abstract:
The invention relates to a short-time arc welding system (10) and method for welding elements (32) on pars (34a). The system is equipped with: a robot (12) having at least one arm (16) that can move in at least one coordinate axis (x,y,z); a welding head (22), which is mounted on the arm (16) and on which a holding device (30) for holding an element (32) and a lifting device (36) for advancing and returning the holding device (30) with regard to the welding head (22) are provided, and; a measuring system (31a, 44, 46) for determining the relative position between a part (34) and an element (32), which is to be welded onto the part (34) and is held by the holding device (30). The measuring system has a stand (31a), which is mounted on the welding head (22) and which is designed to be, during operation, in contact with the part (34a) in order to determine the relative position between the element (32) and the part (34). The inventive system is also equipped with a storage device (46), inside of which a number of welding positions can be stored. The measuring system additionally comprises positioning means (50) for positioning the stand (31a) with regard to an element (32) held inside the welding head (22) in a multitude of at least two different operating positions (a-c), and the measuring system (46) is designed for positioning the stand (31a) each time into an appropriate operating position for each stored welding position.
Abstract:
This invention relates to a device for welding a flange (3) of a part (1) having a shaft (2) and the flange (3) to a steel plate (44). The device comprises a supporting shaft (26), on the end of which a hole (37) for receiving the shaft (2) of the part (1) is formed, a supporting member (27) fitted on the axis of the supporting shaft (26) in a rotary manner, a supporting pipe (33) fitted into the supporting member (27) and having a electrode wire (36) inside, and driving mechanisms (40, 41, 42). In this device, the electrode wire (36) is directed so as to face the flange (3) of the part (1), whose shaft (2) has been received in the receiving hole (37). To achieve this arrangement, the head (34) of the tip of the supporting pipe (33) is positioned near the opening of the receiving hole (37) on the end of the supporting shaft (26), wherein the tip of the electrode wire (36) moves around the flange (3) as the supporting member (27) rotates.
Abstract:
A process and apparatus for welding a metal component (28) to a metal workpiece (40). The component (28) typically comprises a metal weld region (36) and a threaded connector region and the apparatus includes a weld head comprising a nozzle (8) for holding the weld region (36) of the component (28) adjacent the workpiece (40). The weld head induces a weld arc between the weld region (36) of the component (28) and the workpiece (40) to create a weld pool of molten material. The weld head subsequently moves the weld region into the weld pool to permanently join the component (28) to the workpiece (40). The apparatus further comprises a pressurised fluid source and a fluid flow control means for directing the pressurised fluid between the weld head and the component and weld pool so as to deflect any airborne fluid residue of the weld pool away from the connector region of the component (28).
Abstract:
A stud welding gun has a forepart which includes the delivery end of an automatic stud-feeder and is secured to the housing by a quick releasable joint so as to be readily replaceable by another forepart supplying a stud of different size. The gun includes a pneumatic piston and piston rod which serves to push a stud into the collet after delivery to the gun. The piston rod is detachable from the piston and means is provided for locking it in the forepart so that it is replaced into the forepart for studs of different size.