Nelson Stud Welding Inc. offers a wide range of capacitive discharge (CD) weld studs and welding gun accessories, including chucks, ferrule grips and back-up pins. Weld studs are fasteners designed... Read More
Nelson Stud Welding Inc. offers a wide range of capacitive discharge (CD) weld studs and welding gun accessories, including chucks, ferrule grips and back-up pins. Weld studs are fasteners designed for several industrial applications, such as automotive, aerospace, construction and metal fabrication. They are made from steel or stainless steel and are used in a process called stud welding, where the stud is permanently welded to a workpiece using an arc flash. Read Less
Nelson welding studs are fully threaded along their entire length when installed on a workpiece to securely join different parts of the product.
They do not leave any length during the welding process and prevent marring, making them suitable for sheet metal and thin materials.
They require low levels of heat and less time to weld compared to standard arc weld studs.
Nelson chucks or
collets are installed onto CD stud welding guns to hold the welding stud safely and transfer current & pressure during the welding process.
Working Mechanism
The mechanism of capacitor discharge (CD) weld studs is based on the principle of electric capacitance.
The workpiece and the stud are clamped in place, keeping the end of the stud in contact with the workpiece.
A capacitor is charged to a high voltage, typically up to 1000 volts and then stores a large amount of energy.
This stored energy is then discharged through the stud and the workpiece, creating an arc.
The arc melts the end of the stud and fuses it to the workpiece, creating a strong and permanent weld.
Frequently Asked Questions
What determines the power needed to weld the stud?
The diameter of the weld determines the power needed for the welding process, the thickness & composition of the materials being welded, the size & shape of the stud and the type of stud being used.
What is the use of a ferrule grip?
A ferrule grip is a type of connector used in conjunction with a weld stud. It is a cylindrical piece of metal placed over the stud before welding, creating a secure connection between the stud and the workpiece. This unit also distributes the welding heat more evenly and prevents warping or distortion of the workpiece.
What is the function of a back-up pin?
Back-up pins are designed to install onto Nelson CD stud welding guns to prevent weld studs from penetrating too far into the workpiece during the welding application.