Lesson Plan Course Title: Flexible Manufacturing Session Title: Welding Skills and Inspections Performance Objective: After completing this lesson, the student will be able to explain the welding certification process; they will demonstrate they have the skills to complete two welding assignments and use the basic test to inspect the welds, recording the results on the Welding Report and Rubrics. Specific Objectives: Recall the basic requirements to become a certified welder. Identify four welding positions (flat, horizontal, vertical, and overhead). Identify three types of fillet beads (stringer, single, weave). Contrast two forms of welding inspections and tests - destructive and non-destructive. Name six types of weld inspections (radiographic (x-ray), magnetic particle, fluorescent, ultrasonic, visible, bending). Demonstrate different weld positions and types of welds. Safely use the equipment and tools for welding the basic four joints used in welding. Demonstrate the simple weld inspections. Use the thickness of the material to be welded to set the equipment to the correct current. Produce two welding assignments to be inspected visually and bend tested. Preparation TEKS Correlations: This lesson, as published, correlates to the following TEKS. Any changes/alterations to the activities may result in the elimination of any or all of the TEKS listed. Flexible Manufacturing: 130.327(c)(5)(A)(B) …safely use hand and power tools and equipment commonly employed in metal manufacturing; …properly handle and dispose of environmentally hazardous materials used in metal manufacturing. 130.327(c)(7)(C)(D) …use various welding machines to weld multiple joints; …inspect welds. 130.327(c)(8)(A)(B) …use mathematics in precision measuring operations; …interpret blueprints, drawings, charts, and diagrams as related to the sheet Copyright © Texas Education Agency, 2012. All rights reserved. 1 metal industry 130.327(c)(10)(A)(B) …safely use equipment; …properly dispose of environmentally hazardous materials used in sheet metal manufacturing. 130.327(c)(11)(B) …construct common sheet metal seams Interdisciplinary Correlations: Chemistry: 112.35(c)(1)(A)(C) ...demonstrate safe practices during laboratory and field investigations, including the appropriate use of safety showers, eyewash fountains, safety goggles, and fire extinguishers; ...demonstrate an understanding of the use and conservation of resources and the proper disposal or recycling of materials. English Language Arts and Reading, English III 110.33(b)(15)(B)(iv)(v) … accurate technical information in accessible language; … appropriate organizational structures supported by facts and details (documented if appropriate); Occupational Correlation: (reference: O*Net – www.onetonline.org) Job Title: Welders, Cutters, Solderers, and Brazers 51-4121.00 Similar Job Titles: Welder, Welder-Fitter, Fabricator, Maintenance Welder, Mig Welder, Sub Arc Operator Tasks: Operate safety equipment and use safe work habits. Weld components in flat, vertical, or overhead positions. Ignite torches or start power supplies and strike arcs by touching electrodes to metals being welded, completing electrical circuits. Clamp, hold, tack-weld, heat-bend, grind or bolt component parts to obtain required configurations and positions for welding. Soft Skills: Critical Thinking; Active Listening; and Monitoring Copyright © Texas Education Agency, 2012. All rights reserved. 2 Teacher Preparation: The teacher will need to review the Welding Skills and Inspections presentation and may want to research welding inspection on the internet. The teacher should have the equipment and supplies needed for the welding assignment; and have some samples of correct and incorrect welds to show. Reproduce the Welding Skills and Inspections and Welding Report and Rubrics handouts for each student. References: 1. American Welding Society • http://www.aws.org • http://www.bls.gov/ooh/production/welders-cutters-solderers-and-brazers.htm 2. U.S. Department of Labor: Welding Video Instructional Aids: 1. Welding Skills and Inspections presentation 2. Welding Skills and Inspection handout answer key 3. Welding Report and Rubrics Materials Needed: 1. Welding Skills and Inspection handout for each student 2. Welding Report and Rubrics handout – 2 for each student 3. Shielded metal arc welding equipment 4. Scrap metal to practice welding and to use for the assignments Equipment Needed: 1. Computer 2. Data projector 3. Welding equipment Learner Preparation: The student should have passed a safety test over the welding equipment and have a parent permission form turned in. Introduction Introduction (LSI Quadrant I): SAY: Have you thought about becoming a welder? Today we are going to look at the skills that are needed to become a welder. SHOW: Welds that have passed/not passed the visual and bending inspections. SAY: Welder wages range from $11.00 to $27.00 per hour, depending on training/certifications. ASK: Did you know that a welder is paid that much? (Discuss any answer given.) Say: The Welding Skills and Inspections presentation will explain welding certification and skills needed to get a job in the welding industry. Copyright © Texas Education Agency, 2012. All rights reserved. 3 Outline Outline (LSI Quadrant II): Instructors can use the presentation, slides, handouts, and note pages in conjunction with the following outline. MI Outline Notes to Instructor I. Welding Skills and Inspections A. American Welding Society B. AWS Certification C. Welding skills Begin the Welding Skills and Inspections presentation. Distribute the Welding Skills and Inspection handout. The teacher will present the slides on the different skills and inspections. Students will fill in the Welding Skills and Inspection handout during the presentation. Slides 1-5 Discuss the American Welding Society and their skills and certifications. II. Welding Positions A. Flat B. Horizontal C. Vertical D. Overhead Slides 6-8 Explain how and why you have to be able to weld all the joints in any position. III. Types of Fillet Beads and Weave Patterns A. Types of fillet beads B. Types of weave patterns Slides 9-13 Discuss the differences between a fillet and flat joint. Explain that a weld may have to have multiple passes to reach the required strength. Welding in a weave pattern allows for a wider bead to fill in some of the . Copyright © Texas Education Agency, 2012. All rights reserved. 4 thickness of the bead. IV. Welding Inspections A. Destructive inspections B. Non-destructive inspections C. Classroom inspections Slides 14-24 Review the need to inspect a weld. View the types of inspections and explain the types of inspections that will be done for grading a weld. V. Visible Inspection of Welds A. Weld characteristic B. Illustrations C. Chart Slides 25-29 Welding inspections are checked by a set of characteristics. These are listed, explained and illustrated in this section. Distribute the Welding Report and Rubrics handouts – two for each student. VI. Welding Assignments / Safety A. Assignment #1 - welding plate assignment B. Assignment #2 - single pass joint weld C. Safety D. Welding Report and Rubrics handout Slides 30-32 The students will have to build up a series of beads on a ¼” plate, making the plate ¾” thick. Then they will have to weld two plates in a flat position, single bead joint. Both assignments will be cut in half and inspected. The bead will be bent to test for strength. The student will need about 5 days to practice welding. This may take some time depending on the number of welders in the lab. The teacher will assign the points on the Welding Report and Rubrics handouts Copyright © Texas Education Agency, 2012. All rights reserved. 5 for Assignment #1 and #2. VII. Resources A. http://www.aws.org B. http://www.bls.gov/ooh/production/welders-cutterssolderers-and-brazers.htm C. US. Department of Labor: Welding Video D. www.onetonline.org Verbal Linguistic Logical Mathematical Visual Spatial Musical Rhythmic Bodily Kinesthetic Intrapersonal Slide 33 Teacher may want to search the internet for more resources on careers in welding such as www.onetonline.org Interpersonal Naturalist Existentialist Application Guided Practice (LSI Quadrant III): The teacher will need to monitor the students when starting the welding processes. Independent Practice (LSI Quadrant III): The students will practice running beads until they are ready to turn in the assignment. After completing the two welding assignments, the student should visually inspect the welds. The students will complete two Welding Report and Rubrics handouts and turn in with the welds. Summary Review (LSI Quadrants I and IV): Question: Why is it necessary to test some welds in a non-destructive test? Answer: Welds that are critical to the strength of the product have to be tested to check for integrity of the product. Examples include submarine hulls and pipe line joints. Question: How could a certification from the American Welding Society help a welder? Answer: The company hiring the welder knows the types of welds that the new hire can perform. The employer does not have to get the welder certified and the welder can receive a higher wage. Evaluation Copyright © Texas Education Agency, 2012. All rights reserved. 6 Informal Assessment (LSI Quadrant III): The students will be monitored during the welding section. A grade could be assigned for how well the equipment is used and cleaned up when finished at the end of the class period. Formal Assessment (LSI Quadrant III, IV): The Welding Skills and Inspections handouts, the two welding assignments and the Welding Report and Rubrics handout will be graded. The Welding Report and Rubrics will be the rubrics for the two assignments. Extension Extension/Enrichment (LSI Quadrant IV): The students could practice the different welding joints in the flat, horizontal, vertical and overhead positions. Copyright © Texas Education Agency, 2012. All rights reserved. 7 Name __________________________________________Date_______________ Period ____ Welding Skills and Inspections Identify the following welding positions 1. _______________ 2. _______________ 3. _______________ 4. _______________ Identify the following fillet beads. 5. _______________ 6. _______________ 7. _______________ The illustrations of the welds are to be inspected. Write good or poor in the blank to inspect the bead. Answer the questions at the bottom of the page. 8. _______________ 9. _______________ 10. _______________ 11. _______________ What type of inspection completely destroys the weld while testing? 12. _______________ What inspection uses x-rays to check the weld? 13. _______________ What type of inspection uses sound waves to check welds for flaws? 14. _______________ What type of inspection uses a fluorescent light to check welds? 15. _______________ What is the type of inspection where electricity is passed through the weld? Copyright © Texas Education Agency, 2012. All rights reserved. 8 Name __________________________________________Date_______________ Period ____ Welding Report and Rubrics Student Name: _____________________________________ Date: _______________ Welding Assignment: _____________________________ Process: _______________ Brief description of task: __________________________________________________ Inspection Report Visual Inspection Straightness Uniform Appearance No Porosity No Undercut No Crack No Splatter Pass Fail 10 to 17 Points 10 to 17 Points 10 to 17 Points 10 to 17 Points 10 to 17 Points 10 to 17 Points 0 to 9 Points 0 to 9 Points 0 to 9 Points 0 to 9 Points 0 to 9 Points 0 to 9 Points Reason for losing Points Points Total Points Destructive Test* No Slag Pocket No Porosity No Crack 10 to 30 Points 0 to 9 Points 10 to 30 Points 0 to 9 Points 10 to 30 Points 0 to 9 Points Total Points (*) some welds will just be visually inspected if not destructive tested Comments: ____________________________________________________________ Student Grade: ____________________________ Teacher Initials: _____________ Copyright © Texas Education Agency, 2012. All rights reserved. 9 Answer Key 1. Overhead______ 5. Weave_________ 2. Horizontal____ 3. Flat__________ 6. Single________ 4. Vertical______ 7. Stringer______ Good Poor Poor Destructive Radiographic Ultrasonic Fluorescent Magnetic particle Copyright © Texas Education Agency, 2012. All rights reserved. 10