Introduction
Welding is a form of metal fabrication that requires a specialized skill set. Using a welder – in any setting – is a unique talent that provides endless possibilities. Being it’s own Red Seal trade, welders can find high demand, high paying jobs while doing something that is fun and enjoyable. There are many different types of welding: MIG, TIG, stick, Oxy-Acetyline, etc.. Each type of welding has specific purposes and settings.
Your Task
You will learn how to use a welder in an Automotive setting. Welding is most commonly used on exhaust systems of various types. There are multiple ways to weld exhaust together depending on the material of the exhaust pipe (aluminum coated, stainless steel, titanium, etc). For your task you will be using the MIG welding to cut and weld two pieces of exhaust back together.
Process
- Locate the appropriate exhaust pipe used for this project
- Identify and mark the cut location on both sides of the pipe. This is to ensure you can put the pipe back together in the exact same spot. Why might this be important? *IMPORTANT* the key to welding is preparation
- Use masking tape around the cut line to create a perpendicular line around the circumference
- Use a hacksaw or reciprocating saw to make your cut along the cut line. Make sure the pipe is securely clamped using a bench vise.
- Use a file to deburr the edges and a wire brush clean off existing rust *IMPORTANT* do not file/grind off your markings!
- Connect your pipe to the pre-existing markings
- Use magnets or clamps to hold your exhaust in place
- Spot weld each quadrant 12, 3, 6, 9
- Continue to spot weld and “stitch” the weld closed. If you are confident, you can attempt to weld together the quadrants in one bead (if you attempt this, make sure you provide enough time for the pipe to cool between welds)
- brush off impurities