The picture below shows a typical MIG welding machine - NSC Agricultural Technology - Question 4 - 2021 - Paper 1
Question 4
The picture below shows a typical MIG welding machine.
Identify A and B.
Name the TWO gases that are provided as a mixture in the cylinder at C.
What is the funct... show full transcript
Worked Solution & Example Answer:The picture below shows a typical MIG welding machine - NSC Agricultural Technology - Question 4 - 2021 - Paper 1
Step 1
Identify A and B.
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Answer
A is the welding gun, which holds the electrode and delivers the filler material to the weld. B is the crocodile clamp or earth clamp/earth connection, which provides the grounding necessary for the welding process.
Step 2
Name the TWO gases that are provided as a mixture in the cylinder at C.
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Answer
The two gases typically provided as a mixture in the cylinder are Argon and Carbon Dioxide (CO₂) or Helium.
Step 3
What is the function of the heat that is produced by the electric arc?
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Answer
The heat produced by the electric arc functions to melt the metal surfaces of the workpiece and filler material, allowing them to fuse together and form a strong joint.
Step 4
What is the purpose of the gas shielding the weld bead?
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Answer
The purpose of the gas shielding the weld bead is to protect the molten weld pool from atmospheric contamination, preventing oxidation and ensuring a clean and strong weld.
Step 5
Name TWO non-ferrous metals that can be successfully welded with this machine.
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Answer
Two non-ferrous metals that can be successfully welded with this machine are Aluminum and Titanium.
