Lesson 9 – 096.01 Cutting / Welding LESSON OBJECTIVES: Time: 200 Hours Acquaint the student with safe and proper use of both oxy-fuel metal cutting and electric arc welding. Upon completion of this lesson, the student will be able to perform the required cutting and welding processes necessary for a successful tradesman. REFERENCES: Carpentry – Fourth Edition / Leonard Koel Washington State Safety Standards Pocket Welding Guide – Hobart Information Sheets Bates Technical College Library VISUAL AIDS: See Appendix – G Suggested Viewing Check Video Selection Welding Safety STUDY ASSIGNMENT: Carpentry – Fourth Edition / Leonard Koel Unit 19 – Welding & Metal Cutting Equipment / 132 Washington State Safety Standards – see index for welding Pocket Welding Guide – review text as needed IMPORTANT STUDY POINTS: 1. Learn the care and use of your protective attire. 2. Know that the eye protection has required lenses for each procedure. 3. Identify each component by name for the equipment being used. 4. Familiarize yourself with the relationship of the red and green gas hoses to left and right handed threaded fittings. 5. Become acquainted with the terms; AC & DC, straight polarity, reverse polarity, flux, flat, horizontal, vertical, and overhead. 6. Understand the hazards effecting each procedure, and how to avoid them. 7. Review the electrode properties, its classification, and use. WORK ASSIGNMENT: Carpentry Workbook – Fourth Edition / Proctor Unit Exercise 19 – Welding & Metal Cutting Equipment / 73 TEST: For burning or cutting operations the drag lines must be vertical and not pronounced; cut must be sharp and clean. All arc welds must be deposited with complete fusion and must be free from slag, overlapping, cracking, and porosity; it must be 25% greater in width than depth, and must be without undercutting. LAB: All learning procedures for this lesson whether prior to, during, or in lieu of the Carpentry course class hours must have or will take place at an accredited institution under the supervision of a certified welding instructor. This task is not offered in the carpentry shop proper. Performance Objective: 96.01 Demonstrate knowledge of welding principles/procedures and safety Given a written test, the student will demonstrate knowledge of welding principles/procedures and safety. Ancillary occupation pre-apprenticeship students must score minimum 50% accuracy. 96.02 Set up oxyacetylene, SMAW (ARC) and GMAW (MIG) welding equipment Given appropriate equipment, supplies, power source, and tools, the student will set up oxyacetylene, shielded metal arc welding, and GMAW (MIG) welding equipment. Set-ups must be within parameters of welding shop procedures. Safety practices/principles must not be violated. 96.03 Burn (cut) material using hand held torch Given a striker, metal cutting equipment, protective clothing/equipment, oxyacetylene cutting tips, welder's standard tool kit, work order, and workpiece, student will burn (cut) material using hand held torch, in accordance with welding shop procedures/guidelines for ancillary occupation pre-apprenticeship familiarization. Safety practices/principles must not be violated. 96.04 Make welds using SMAW process Given a chipping hammer, electrodes, grinder, SMAW equipment, fast freeze rods, fast fill rods, portable screens, protective clothing/equipment, weld gauge, wire brush, work orders, and work pieces, the student will make welds using SMAW process. Student must use appropriate fast fill or fast freeze rod, and make welds in accordance with welding shop procedures/guidelines for ancillary occupation pre-apprenticeship familiarization, performing welds in the four basic positions. Safety practices/principles must not be violated. 96.05 Weld steel using GMAW (MIG) process Given a filler metal, grinder, MIG equipment, protective clothing, weld gauge, wire brush, work orders, and workpieces, the student will use GMAW process to weld steel, in accordance with welding shop procedures/guidelines for ancillary occupation pre-apprenticeship familiarization. Safety practices/principles must not be violated. CONDITIONS FOR PERFORMANCE OF TASK: 1. Study guide, Hobart welding pocket book 2. Accredited welding shop & certified instructor 3. Safety glasses ,wire brush, and slag hammer 4. Cutting goggles, striker, soapstone in holder 5. Welding hood, leather jacket, & gloves. 6.