The Basics Of A Capacitor Discharge Stud Welder

Stud welding is a very specific type of automated welding process that attaches a stud weld to a metal workpiece. This process is very fast, taking just fractions of a second per weld, and producing strong, durable welds that offer a number of benefits over standard types of fasteners.

As a general guideline, a capacitor discharge welder is used for applications with smaller diameter types of stud welds and thinner workpieces. The very short weld time prevent heat damage to the surface of the workpiece and eliminates the risk of burns, discoloration or damage to the other side of the workpiece as well. This means it is virtually impossible to see any aspect of the stud weld process on the opposite side of the piece of metal.

A capacitor discharge welder is the best choice for working on electrical components, HVAC system parts, enclosures, stainless steel cabinets and fixtures and other similar types of applications. It can also be used in the production of stovetop cookware and jewelry items.

The Process

Specialized stud welds are positioned in the hand held tool and gun is then positioned at the point of the weld. The tool is controlled by a power source which includes capacitors storing energy at a particular voltage based on the specific application. When the operator engages the hand held tool, the energy is discharged from the gun through the ignition tip, creating an arc that melts the ignition tip on the weld stud as well as the base metal. Virtually simultaneously, the weld stud is pressed down and into the molten pool, creating a complete, solid weld.

There is limited operator welding knowledge required to successfully operate a capacitor discharge welder. Some of the new models are completely automated, eliminating the need for any adjustments by the operator during the welding process.

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