Weld Damaged Or Torn Steel Body Panels; Repair Broken Welds

Weld damaged or torn steel body panels; repair broken welds Lesson Plan for CRT 130-1 NON-STRUCTURAL ANALYSIS AND DAMAGE REPAIR SECTION I

Course HS Title: Non-Structural Analysis and Damage Repair Program: KCTCS Courses included in HS Title: (Lesson is prepared for course highlighted.) KCTCS Course No. KCTCS Course Title

Introduction/Conte This lesson will instruct the student on how to weld damaged or torn steel body xt panels, and repair broken welds. Knowledge of these techniques and the skills required to correct problems associated with this task are necessary for a student to acquire if they wish to compete for high paying, high skilled jobs in an Automotive Repair Facility. Entry level technicians need to be able to perform this task to 100% accuracy. Incorrectly performing this task can lead to an automobile accident or create customer satisfaction issues. Prepared By School Date:

Lesson Grade Level No. Students No.IEP's: Length:

Task Weld damaged or torn steel body panels; repair broken welds

N Objective o. Given the proper tools and instruction, the student will be able to weld damaged or torn steel body 1 panels, repair broken welds, and pass a written test covering the task with 100% accuracy.

Connections: New Common Core: RST 11-12-2 RST 11-12-3 A-CED-4 New Common Core Technical TD-SYS-1 TD-OPS-3 New Science Standards HS-PS2-3. Skills Standards: AA001 EG011

INSTRUCTIONAL MATERIALS/TECHNOLOGY Teacher Designed Materials and Other Handouts

Textbooks and Workbooks Autho Editio Publishe Page Title/ISBN No. r n r s Variou ASE Test Prep Non-Structural Analysis and Damage Repair Third Delmar 22-23 s

Equipment Quantity Item Source As Needed Welder Various

Content/Presentation/Demonstration Outline Instruct students that a weld is formed when separate pieces of material are fused together through the application of heat. The heat must be high enough to cause the softening or melting of the pieces being joined. Tell students that the three types of heat joining in collision repair are fusion welding, pressure welding, and adhesive bonding. Teach students that fusion welding is joining different pieces of metal together by melting and fusing them into each other. The metal pieces are heated to their melting point, joined together (usually with filler rod), and allowed to cool. Explain that resistance spot welding uses high electric current passing from two electrodes through the metal to be welded. Let students know that pressure welding is the most popular weld procedure used by vehicle manufacturers and the most important welding process. Explain that in this type of weld, pressure is applied to the electrodes to hold the panels together. No filler material is added to the weld. Instruct them that current flows through the metals and produces enough heat to melt the base metals. Instruct students that adhesive bonding uses oxyacetylene to melt a filler metal onto the work-piece for joining. Let them know that brazing is a form of adhesive bonding, and it weakens steel by applying too much heat, therefore it is not recommended for collision repair. Tell students to prepare the surface for welding by removing paint, undercoating, rust, dirt, oil, and grease. Have them use a plastic woven pad, sander, blaster, or wire brush. They should avoid removing galvanized coatings. Instruct them to apply weld- through primer to all bare metal mating surfaces. Let them know that the surface to be welded must be bare, clean metal. If not, tell them contaminants will mix with the weld puddle, resulting in a weak, defective weld.

Applications/Practice 1 Refer to content

Evaluation and feedback Prior to Testing or Lab Work Objective 1. / Formative assessment / Instructor will observe students as they practice the procedure to assure correct procedure and safety practices are being followed. A checklist will be utilized to chart 1 student progress on the task. Questioning techniques will be utilized as necessary to demonstrate student comprehension / Adaptations and/or accommodations for special needs students will be added if required.

STUDENT ASSESSMENT: (Assess student progress with performance criteria.) 1 Objective 1 / Summative assessment / written test questions on stated objective / adaptation and / or accommodations for special needs students will be added if required

IMPACT--Reflection/Analysis of Teaching and Learning: (How did students’ progress in relation to the state objectives? Was the instruction successful? Analyze samples of student work particularly that which is unsatisfactory, for the purpose of planning further instruction.)

REFINEMENT--Lesson Extension and Follow-up: (To be filled in as the lesson is modified during initial planning and/or during the teaching learning process.)