Step 6 continue moving the torch along the weld line and add material to create an even weld bead until the end of the weld is reached.
How to torch weld sheet metal.
With these materials use a tri mix gas 90 helium 8 argon and 2 co2.
Clamp a piece of copper sheet perhaps 1 32 to 1 8 thick behind the hole and weld in some metal grind to level it.
How to weld with a propane torch.
This produces a.
Use a welding rod to add additional material to the weld if additional metal is needed to fill the gap.
Apply the flame to your weld.
To weld sheet metal with solid wires use electrode positive ep or reverse polarity.
To fill some of the rust holes grind away the paint and rust on both sides.
Ensure that the torch fixture is securely attached to the propane tank.
You will probably have to use a dolly and metal slapper to level the welded area after grinding because the weld metal shrinks as it cools.
Don t attempt to weld thin materials like sheet metal with flux cored wires which put more heat into the base metal.
If you hold the flame too closely to the material for too long a period you will create holes in the material.
Some of the spot welders used in repair and restoration do not squeeze the weld area between two electrodes but apply spot welding force and heat to one piece of metal that is grounded through the other piece to be joined to it.
Put on your safety goggles and thick gloves.
Move at an even pace in order to see your results.
Commonly metal cutting torches use a combination of oxygen and acetylene gases.
Light the cutting torch and adjust the flame.
Adjust your flame and begin to carefully move the torch over the area to be welded.
Move the tank s fuel knob usually located near the collar of the torch attachment to the open or on position.
Oxy fuel welding torches.
But now i use henrob dhc 2000.
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I used to have a smith torch but i ended up buying an airco.
Alternatively with an electric torch connect the power cord and press the starter button to light the torch.