Slab base weld nuts

Stud weldingFrom Wikipedia, the free encyclopedia

Stud welding is a similar to flash welding.where a bolt or specially formed nut is welded onto another metalpart. The bolts may be automatically fed into the spot welder. Weld nuts generally have a flange with smallnubs that melt to form the weld. Studs have a necked down, un-threaded area for the same purpose. Weldstuds are used in stud welding systems.

Capacitor discharge weld studs range from 14 gauge to 3/8" diameter. They can come in many differentlengths ranging from 1/4" to 5" and larger. The tip on the weld end of the stud serves a twofold purpose:

It acts as a timing device to keep the stud off the base material1.It disintegrates when the trigger is pulled on the gun.2.

When the tip disintegrates, it melts and helps solidify the weld to the base material.

Arc studs range from a #8 to 114" diameter. The lengths are variable from 3/8" to 60" (for deformed bars).Arc studs are typically loaded with an aluminum flux ball on the weld end which aids in the welding process.

Stud welding, also known as stud arc welding, joins a stud and another piece of metal together. The stud isusually joined to a flat plate by using the stud as one of the electrodes. The polarity used in stud welding depends on the type of metalbeing used. Welding aluminum, for example, would usually require direct-current electrode positive (DCEP). Welding steel would requiredirect-current electrode negative (DCEN).

Stud welding uses a type of flux called a ferrule, a ceramic ring which concentrates the heat generated, prevents oxidation and retainsthe molten metal in the weld zone. The ferrule is broken off of the fastener after the weld is completed.

Portable stud welding machines are available. Welders can also be automated, with controls for arcing and applying pressure. Studwelding is very versatile. Typical applications include automobile bodies, electrical panels, shipbuilding and building construction.Shipbuilding is one of the oldest uses of stud welding. Stud welding revolutionized the shipbuilding industry. All other manufacturingindustries can also use stud welding for a variety of purposes.

A type of stud welding called capacitor-discharge (CD) stud welding differs from regular stud welding in that capacitor-discharge weldingdoes not require flux. The weld time is shorter, enabling the weld to bond with little oxidation and no need for heat concentration. Thisprocess uses a direct-current arc from a capacitor. The weld time in this process is between 1 and 6 milliseconds. Capacitor dischargestud welding with the latest equipment can create a weld without burn through showing on the opposite side of very thin metals. CD studwelding is often used for smaller diameter studs and pins, as well as on non-standard materials and for accuracy. On the other hand, arc

Stud welding - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Stud_welding

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