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What is Stud Welding?
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What is Stud Welding?

 

Overview

Stud welding is a complete one-step fastening system, using fasteners called weld studs. Weld studs come in a variety of designs, threaded, unthreaded, tapped, etc., sizes and shapes for a wide range of applications.

Examples of Weld Studs:

weld-stud-examples.jpg

A weld stud can be end-joined to a metal work piece instantaneously for a high quality, high strength permanent bond. 


The base metal and the welded fastener do not need to be the same material. For example these combinations can be welded together - brass to copper, brass to steel, copper to steel and similar combinations.

Stud welding is less expensive than other fastening methods and can used in locations which do not allow the use of other fasteners. Weld studs can be installed by one man, working on one side of the work piece, in less than a second.

There are many reasons why the stud welding process is superior over other fastening systems.

 

Industries using Stud Welding

Weld Studs fasteners are used in a wide variety of industries:

  • Aerospace

  • Appliances

  • Automotive

  • Construction

  • Electronics

  • Forging Process

  • Insulation Installation

  • Light and Heavy Duty Equipment

  • Offshore

  • Petrochemical

  • Shipbuilding

  • Signs and Decorative Trim

  • Toys

  • Transportation

  • Utilities Metalworking

 

Stud Welding Equipment

The equipment required for stud welding is composed of the following:

  • A direct current Power Supply

  • A Controller

  • A Weld Gun

  • Cables to tie the system components and base metal      together

In most systems, the power supply and controller are combined as one component called the "Welder".

 

Two Methods for Stud Welding

Two stud welding methods are available - Arc Stud Welding and Capacitor Discharge (CD) Stud Welding. The method used depends on the type of stud fastener needed based on the application and the base metal the fastener well be welded to.

 

Arc Stud Welding Process

Arc Stud Welding is generally used to weld large diameter fasteners to rougher and thicker base metals.

Arc Studs may be almost any shape and there are literally hundreds, however, they must have one end of the fastener designed for Arc welding equipment.

Mild steel, stainless steel and aluminum are applicable materials for Arc welding.

1.

arc-stud-welding-process-01.gif


A fastener and ceramic ferrule are firmly placed against the work surface under spring tension.

2.

arc-stud-welding-process-02.gif


Upon triggering, the weld gun automatically lifts the fastener from the base metal and initiates a controlled electric arc which melts the end of the fastener and a portion of the base metal.

3.

arc-stud-welding-process-03.gif


A ceramic arc shield concentrates the heat and retains the molten material in the weld area for maximum weld strength and reliability.

4.

arc-stud-welding-process-04.gif


At the precise moment the fastener and the parent metal become molten, the fastener is automatically plunged into the work surface. The metal solidifies and a high quality fusion weld is completed.

 

How a Weld Stud Fastener is Installed


1. Load

load-weld-stud-2.jpg

The fastener is manually or automatically inserted into the stud welder chuck.


2. Position

position-the-stud-gun.jpg

The fastener is positioned into firm contact with the work surface.


3. Fire

weld-gun-sparks.jpg

The welding gun is activated and the fastener is welded in a fraction of a second. The fastener weld develops full strength instantly.


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