6.1 Briefly describe the working principle of the following machines used in the welding workshop:
6.1.1 Guillotine
6.1.2 Bending rolls
6.2 What is the primary function of the regulators fitted to the gas cylinders of the oxy-acetylene equipment?
6.3 What is the press machine used for in the mechanical workshop?
6.4 FIGURE 6.4 below shows the MIG/MAGS welding process - NSC Mechanical Technology Welding and Metalwork - Question 6 - 2018 - Paper 1
Question 6
6.1 Briefly describe the working principle of the following machines used in the welding workshop:
6.1.1 Guillotine
6.1.2 Bending rolls
6.2 What is the primary fun... show full transcript
Worked Solution & Example Answer:6.1 Briefly describe the working principle of the following machines used in the welding workshop:
6.1.1 Guillotine
6.1.2 Bending rolls
6.2 What is the primary function of the regulators fitted to the gas cylinders of the oxy-acetylene equipment?
6.3 What is the press machine used for in the mechanical workshop?
6.4 FIGURE 6.4 below shows the MIG/MAGS welding process - NSC Mechanical Technology Welding and Metalwork - Question 6 - 2018 - Paper 1
Step 1
6.1.1 Guillotine
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Answer
The guillotine operates by having a bottom cutting blade fixed horizontally while a top cutting blade moves downwards. The mechanism is driven by an electric motor, flywheel, gearbox, and axle, with eccentric motion or hydraulic action. The machine can be activated manually by foot or with a lever, allowing for controlled cutting.
Step 2
6.1.2 Bending rolls
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Answer
Bending rolls consist of two fixed rollers placed next to each other that rotate in unison, either manually or electrically. There is a third adjustable roller positioned between the two fixed rollers that applies downward pressure to the metal. This action causes the metal to deflect and ultimately take the desired round shape.
Step 3
6.2 Regulators on gas cylinders
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Answer
The primary function of the regulators fitted to gas cylinders is to reduce the cylinder pressure to a safe operating or working pressure, ensuring stable gas flow for welding operations.
Step 4
6.3 Press machine
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Answer
The press machine is used primarily for installing or removing components from mechanical devices or machines. Its main function is to press profiles onto material, facilitating various manufacturing processes.
Step 5
6.4 MIG/MAGS welding process
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Answer
In the MIG/MAGS welding process illustrated in Figure 6.4, the following labels apply:
A = Weld pool / weld bead / molten metal
B = Electrode wire / electrode
C = Gas shield / electrical contact / nozzle / contact tip
