Welding and Cutting for Sheet Metal
Thin-gauge welding and cutting for the sheet metal trade, followed through a third-year apprentice at a Halifax sheet metal contractor: codes and procedures, welding and cutting safety, plasma, oxy-fuel and laser cutting, joint preparation and fit-up, GMAW on carbon and galvanized sheet, GTAW on stainless steel with back purging, AC GTAW on aluminum, distortion control, inspection, light testing and qualification, and a capstone stainless grease duct section and laboratory exhaust transition.
SMW-230 12 lessons · 3 h 52 min ▶ Video lessons coming soon
Offered by HSM University · Sheet Metal
This is the Canadian version of this course. See the American version.
What you'll learn
- Explain where the sheet metal trade uses welding and thermal cutting, compare the main arc processes, and read the codes, procedures and weld symbols that govern the work
- Identify the fume, radiation, fire and electrical hazards of welding and cutting and apply source capture, monitoring, hot work permits and safe practices
- Select and use plasma, oxy-fuel and laser cutting for thin sheet and steel sections, and treat cut edges on carbon, galvanized and stainless steel
- Choose cutting methods and joint designs for thin metal, and prepare, clean, fit, clamp and tack parts to the procedure's limits
- Set up GMAW for thin gauge, choosing transfer mode, wire, gas and settings, and estimate wire use and deposition
- Weld carbon and galvanized sheet with GMAW using stitch and skip welding, prevent burn-through, and repair the zinc coating
- Set up and operate GTAW, choosing current type, tungsten, gas and filler, and control heat with the pedal and pulsing
- Weld thin stainless steel with GTAW and back purging, match fillers to grades, and remove heat tint and passivate
- Weld thin aluminum with AC GTAW, choosing balance, frequency, current and filler, and prevent porosity and cracking
- Explain how welds distort thin sheet and prevent, reduce and correct distortion with design, heat control, chill bars, clamping and sequence
- Inspect sheet metal welds against acceptance criteria, test liquid-tight joints by light test, and explain procedure and welder qualification
- Take a welded grease duct section and a stainless laboratory exhaust transition from drawing to tested, cleaned and recorded work
Course content
12 lessons · 3 h 52 min total · final exam
- 1 Welding and cutting in the sheet metal trade 21 min · quiz
- 2 Welding safety: fumes, light, fire and electricity 21 min · quiz
- 3 Thermal cutting: plasma, oxy-fuel and laser 19 min · quiz
- 4 Choosing a cutting process and preparing joints 18 min · quiz
- 5 GMAW fundamentals for thin gauge 19 min · quiz
- 6 GMAW on carbon and galvanized sheet 19 min · quiz
- 7 GTAW fundamentals 20 min · quiz
- 8 GTAW on stainless steel 19 min · quiz
- 9 Welding aluminum 19 min · quiz
- 10 Distortion control 19 min · quiz
- 11 Weld inspection, testing and qualification 19 min · quiz
- 12 Capstone: a grease duct section and a lab exhaust transition 19 min · quiz
- E Final exam 20 questions
Requirements
Recommended background. You can start any course at any time.
Description
Thin-gauge welding and cutting for the sheet metal trade, followed through a third-year apprentice at a Halifax sheet metal contractor: codes and procedures, welding and cutting safety, plasma, oxy-fuel and laser cutting, joint preparation and fit-up, GMAW on carbon and galvanized sheet, GTAW on stainless steel with back purging, AC GTAW on aluminum, distortion control, inspection, light testing and qualification, and a capstone stainless grease duct section and laboratory exhaust transition.