Enterprise: Ag MechanicsJob: Arc WeldingObjective: Learn to safely and effectively shielded arc weld • 1- What is sheilded arc welding? • 2- What are some safety precautions for sheilded arc welding? • 3- What are some procedures for striking an arc? • 4- List some basic arc weld and positions. • 5- List the equipment needed for sheilded arc welding. • 6- Draw some basic weave patterns used • in sheilded arc welding.
7- What is an electrode? • 8- How should metal be prepared for welding? • 9- How is cutting accomplished? • 10- What determines amp setting? • 11- What determines rod size?
1. Shielded arc welding is a fusion process where heat is obtained from an electric arc which is formed between a base metal and an electrode. • 2. Some safety precautions are: • A) Don't strike arc until helmet is in place • B) Wear proper clothing • C) Hold electrode by insulated handle • D) Proper ventilation • E) Avoid welding near combustable material • F) Always wear safety glasses • G) Never stand in water when welding • H) Never weld on closed conainers • 3. Hold the elctrode at a 15 degrees travel angle and either tap or strike an arc then position electrode 1/8 inch from metal.
4. Some basic welds are Butt, Tee, Lap V, and positions are Flat, Horizontal, Vertical and Overhead. • 5. Some equipment is: • A) Grinder E) Chipping Hammer • B) Helmet F) Clothes • C) Vice G) Helmet • D) Wire Brush H) Pliers • 7. An electrode is a metal rod coated with Flux the numbers on the rod stand for 601 1 - • 60 = 60,000 lbs per square inch • XX 1 = Position 1 =All 2 = Flat and Horizontal 3 = Flat • XXX 1 = Polarity • 1,3,4,8=AC or DC Reverse 2 = AC or DC straight 0 = DC Reverse
8. Metal should be cleaned of oil, paint, rust, and ground to bevel if over 1/4". • 9. Cutting is done by turning amps up 150% and pushing rod through metal. • 10. The amp setting is determined by the rod size and metal thickness • 11. The size of rod used is based on the thickness of metal.