1. Unit 10 Welding, Brazing and Cutting

2. Safety Principles General safety rules apply in ANY shop! Always observe all rules and procedures given by instructor Proper PPE should be worn at ALL TIMES – Jeans with no frays – Cotton long sleeved shirt – Close toed shoes/boots – Safety glasses and helmets Know where fire extinguishers are located in case of emergency Jupiter Images

3. Fire Extinguisher Classifications

4. Basic Welding Processes SMAW – Stick welding, use electrode to melt metals – Typically the first process learned – Used for repair and maintenance – Popular in agricultural industry GMAW – Gas metal arc welding, use wire fed through MIG gun – Relies on inert gas – More expensive – Superior results Jupiter Images

5. Basic Welding Processes GTAW – Gas tungsten arc welding (another form of GMAW) – Slower – High quality welds OFW – Oxyfuel welding (fusion and braze) – Electrode rod with base metal Jupiter Images

6. Electrode Rods and Wires Electrode Rods – Welding rod coated with flux – Different rods are available – Differ in tensile strength and flux coating Electrode Wires – Packed in spools – Classified differently – Differ in tensile strength Jupiter Images

7. Electrode Rod

8. Electrode Wire

9. Welding Positions

11. Welding Joints

13. Oxyacetylene and Plasma Arc Cutting Oxyacetylene cutting- – Used on ferrous metal (steel) – Portable, useful in agricultural industry Plasma cutting- – Stationary or handheld – Can be run by computer Plasma Arc SAFETY – Higher voltage – Never use in damp, wet areas – Use ear plugs/muffs – Proper PPE Jupiter Images