Welding

There are many types of welding. In The University of Idaho ME shop we offer MIG and TIG welding.

Apparel
All skin should be covered by non-synthetic fabric-polyester and the like they will melt to the skin. Exposed skin will get sunburned from the electrical arc flash. Leather cloves shall also be worn to protect hands. "Caution- do not handle hot metal with gloves use the pliers.

Helmet
Welding needs to have a Number 10 Lens "Higher the number the darker the lens"

DON'T WELD
Do not weld any metal with plating such as: Example: Galvanized Metal, Chrome, Cad-plated, etc. Do not weld any metals that hold or have been in contact with Flammable liquids: Example: Gas Tanks, oil pans, etc.

Setting up MIG Welder
Choose the Correct wire gauge based on the type of material and thickness of weld. Set wire speed and thickness dials to appropriate settings (Proper settings to the thickness of metal to be welded are located under the hood of the welder) Ground welder to table or work to be welded Turn on CO tanks for the inert gas shield Turn on the MIG Welder Turn on the ventilation hood using the switch on the wall

Setting up Material to be Welded
Prep Surface to ensure a clean strong weld by wire brushing or grinding Put on all safety gear If the wire is protruding 1 cm past the nozzle, break it off on the table. DO NOT leave it stuck to the table Ensure others around know that you are welding by saying "COVER"

Welding Techniques
Angle of Welder: Welder should ba as close to perpendicular to the surface, and angled 20-30 degrees in the direction of travel shown Push vs Pull welding: This is welder travel direction. Push is stronger, with more penetration in thick metals. Pull is weaker and with less penetration; good for thin metals