6.1 FIGURE 6.1 below shows a pedestal drill - NSC Mechanical Technology Welding and Metalwork - Question 6 - 2020 - Paper 1
Question 6
6.1 FIGURE 6.1 below shows a pedestal drill. Label parts A–D.
6.2 Explain the operating principles of the following machines that are used in the welding workshop:
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Worked Solution & Example Answer:6.1 FIGURE 6.1 below shows a pedestal drill - NSC Mechanical Technology Welding and Metalwork - Question 6 - 2020 - Paper 1
Step 1
Figure 6.1 Label parts A–D
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Answer
A = Table / Machine table / Working table / Platform
B = Chuck / Drill bit holder
C = Motor
D = Pillar / Column
Step 2
6.2.1 Horizontal band saw
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The horizontal band saw operates by tensioning the blade around two pulleys. The machine is driven by an electric motor, allowing the blade to cut continuously. The blade assembly is controlled by either hand or hydraulic controls, ensuring the metal is securely held in the stock clamp during cutting.
Step 3
6.2.2 Punch and shear (cropper) machine
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This is an electrically driven machine that utilizes a flywheel and clutches to engage various shearing blades or punches.
Step 4
6.3 Name THREE primary functions of flashback arrestors
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It prevents back-feeding/backfiring.
It protects the gas cylinders.
It ensures safe operation during gas welding processes.
Step 5
6.4 Name FOUR uses of taps and dies
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Taps are used to cut / clean internal/nut screw threads.
Dies are used to cut / clean external/bolt screw threads.
Taps and dies can repair damaged threads.
They are utilized in conjunction for creating precise fittings in mechanical components.
