Arc Welding Basics SECTION OVERVIEW: Section Overviews are provided on the introductory slides at the front of each topical area to explain the intended use for the slides included in the section. Slide numbers are included on the Section Overview slides for easy reference when preparing for delivery of the slide content. TEACHER NOTES: Teacher Notes are included on the Section Overview slides as a reference tool when making class preparations. Suggested Activities are included for teachers to use to help students gain practical experience with the welding content. However, these are designed to be supplemented by each teacher based on local program needs. Slides have been developed to incorporate content information regarding performance standards from the American Welding Society (AWS) and the National Academic Standards for English, Science, and Math.

Unit Topics Topics included in this overview are: Introduction What is Arc Welding? Why is Welding Important? Why Learn to Weld? Careers in Welding The American Welding Society (AWS) Welding Safety Basic Electricity Welding Fundamentals Welding Certification SECTION OVERVIEW: This slide is meant to start generating conversation and thoughts about content to be covered in this lesson. TEACHER NOTES: Bulleted information on topical areas is provided to lead class discussion on areas which are to be covered in the training.

Objectives Upon successful completion of this unit of study, you will be able to … Identify definitions and terminology associated with welding Demonstrate safe working habits in the welding environment Name the parts and types of welds and weld joints Interpret basic welding symbol information Identify opportunities available to welders SECTION OVERVIEW: This slide is included to explain the objectives of this unit of study. TEACHER NOTES: Teachers could use this opportunity to give a high-level overview of the importance and application of welding in today’s society.

Introduction SECTION OVERVIEW: These slides are to serve as an opener for discussions about the basics of arc welding. TEACHER NOTES: Slides 4-9: Slides are provided for teachers to use to help students learn about the basics of arc welding. Slide content is designed to serve only as a framework for class discussions and should be supplemented with additional materials based on local program needs. The American Welding Society Contact you local chapter Student memberships available You do not need to be a member to attend a chapter meeting. Find out more at www.aws.org

Arc welding is most commonly used to join two pieces of metal What is Arc Welding? Arc welding is most commonly used to join two pieces of metal The welder creates an electric arc that melts the base metals and filler metal (consumable) together so that they all fuse into one solid piece of metal Steel Pipe – Tack Welded Final weld after several beads are made Root Pass or “Stringer Bead”

Basic Steps of Arc Welding Prepare the base materials: remove paint and rust Choose the right welding process Choose the right filler material Assess and comply with safety requirements Use proper welding techniques and be sure to protect the molten puddle from contaminants in the air Inspect the weld

Welding Safety SECTION OVERVIEW: The next few slides identify safety requirements when welding. TEACHER NOTES: Slides 15-27: Bulleted information on topical areas is provided to lead class discussion on important areas of safety in the welding environment. Use this time to discuss OSHA (Occupational Safety & Health Administration) OSHA - www.osha.gov Regulation 1910 – Occupational Safety and Health Standards for general industry Tell the students where all the information listed on the following slides can be found. MSDS – www.lincolnelectric.com Quick Links: MSDS or call 1-216-481-8100 See slide 20 for additional website links See Facilitator’s Guide for more information on welding hazards such as Fumes and Gases and Electrical Shock. For a free DVD on Welding Safely, submit the order form found in the back of the Lesson Plan Facilitator’s Guide (shipping and handling charges will apply).

Protect yourself and others from potential hazards including: Arc Welding Safety Protect yourself and others from potential hazards including: Fumes and Gases Electric Shock Arc Rays Fire and Explosion Hazards Noise Hot objects

Fumes and Gases Fumes and gases can be hazardous to your health Keep your head out of the fumes Use enough ventilation, exhaust at the arc, or both, to keep fumes and gases from your breathing zone and the general area See product labeling and MSDS for ventilation and respirator requirements

Do not make repairs yourself, alert your instructor immediately! Electric Shock Electric shock can kill Do not touch live electrical parts Primary Voltage –230, 460 volt input power Secondary Voltage – 6 to 100 volts for welding Insulate yourself from work and ground Follow all warnings on welding equipment Do not make repairs yourself, alert your instructor immediately!

Arc Rays Arc rays can injure eyes and burn skin The welding arc is brighter than the sun Precaution must be taken to protect your eyes and skin from UV radiation Wear correct eye and body protection

Fire and Explosion Hazards Welding sparks can cause fires and explosions Sparks and spatter from the welding arc can spray up to 35 feet from your work Flammable materials should be removed from the welding area or shielded from sparks and spatter Have a fire extinguisher ready Inspect area for fires 30 minutes after welding

Loud noises can damage your hearing Keep loud noises at a safe level by using proper hearing protection such as: Ear plugs Ear muffs

Protective Clothing Welders must wear protective clothing for Protection from sparks, spatter and UV radiation Insulation from electric shock Protective clothing includes … Fire-proof clothing without rolled sleeves, cuffs or frays Work boots Welding gloves, jackets, bibs, and fire-proof pants Welding cap, helmet and safety glasses Ear protection – ear plugs and muffs