Introduction to shielded arc welding and welding in general

1. Introduction to shielded arc welding and welding in general Principles of Agriculture

2. Introduction to shielded arc welding • 1- What is shielded arc welding? Describe it. • 2- Identify some safety precautions for shielded arc welding? • 3- What are some procedures for striking an arc? • 4- List the basic weld joints and positions. • 5- List the equipment needed for shielded arc welding. • 6- Examine some basic weave patterns used in shielded metal arc welding.

3. What is shielded arc welding? • 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 combustible material. • F) Always wear safety glasses. • G) Never stand in water when welding. • H) Never weld on closed containers. • 3. Hold the electrode at a 15 degrees travel angle and either tap or strike an arc then position electrode 1/8 inch from metal.

4. What is shielded arc welding? (cont.) • 4. Some basic weld joints are Butt, Tee, Lap, Corner and Edge. • 5. Welding positions are flat, horizontal and overhead. • 6. Some of the equipment used includes: A) Grinder E) Chipping Hammer B) Helmet F) Clothes/Sleeves C) Vice Grips G) Helmet D) Wire Brush

5. Why is understanding welding important to the agriculture industry? • Used for construction, repairs and industry development. • Provides many jobs to the industry. • Creates a higher need for development in technology and metal fabrication. • What else can you think of?