2. Enterprise: Ag Mechanics Job: Arc Welding Objective: Learn to safely and effectively shielded arc weld n 1- What is sheilded arc welding? n 2- What are some safety precautions for sheilded arc welding? n 3- What are some procedures for striking an arc? n 4- List some basic arc weld and positions. n 5- List the equipment needed for sheilded arc welding. n 6- Draw some basic weave patterns used n in sheilded arc welding.

3. n 7- What is an electrode? n 8- How should metal be prepared for welding? n 9- How is cutting accomplished? n n 10- What determines amp setting? n 11- What determines rod size?

4. n 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. n

5. 4.Some basic welds are Butt, Tee, Lap V, and positions are Flat, Horizontal, Vertical and Overhead. 5.Some equipment is: » A) GrinderE) Chipping Hammer » B) HelmetF) Clothes C) ViceG) Helmet D) Wire BrushH) 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 = Position1 =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 n

6. 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. n 10. The amp setting is determined by the rod size and metal thickness n 11. The size of rod used is based on the thickness of metal.