6.1 Explain the working principle of the following machines:
6.1.1 Power-driven guillotine:
- Activated by foot pedal - NSC Mechanical Technology Welding and Metalwork - Question 6 - 2024 - Paper 1
Question 6
6.1 Explain the working principle of the following machines:
6.1.1 Power-driven guillotine:
- Activated by foot pedal.
- Driven by an electric motor, flywheel, gear... show full transcript
Worked Solution & Example Answer:6.1 Explain the working principle of the following machines:
6.1.1 Power-driven guillotine:
- Activated by foot pedal - NSC Mechanical Technology Welding and Metalwork - Question 6 - 2024 - Paper 1
Step 1
Explain the working principle of the following machines:
Power-driven guillotine:
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Answer
The power-driven guillotine operates by being activated through a foot pedal, which is connected to an electric motor. This motor drives a flywheel and gearbox to ultimately control an axle that moves the top cutting blade downwards with great force. The guillotine utilizes an eccentric motion mechanism for the cutting stroke, which enhances the efficiency of cutting various materials.
Step 2
Pyramid bending rolls:
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Answer
Pyramid bending rolls consist of three rollers arranged in a horizontal position. Among these rollers, two fixed rollers are positioned at the bottom and rotate in unison. The top roller is adjustable in an up-and-down motion and applies downward pressure on the metal being processed. This configuration allows the metal to deflect and be shaped into the desired curvature as it passes through the rollers.
Step 3
State TWO uses of the hydraulic press in the mechanical workshop.
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Answer
Installing components into larger assemblies, which requires precise applications of force.
Removing components that are tightly fit, ensuring safe extraction without damage.
Step 4
Name TWO types of hardness testers.
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Answer
Rockwell Hardness Tester.
Brinell Hardness Tester.
Step 5
Label parts A-D.
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Answer
A - Filler rod/Welding rod/Brazing rod
B - Welding tip/Welding nozzle
C - Flame
D - Parent metal/Work piece
Step 6
State the function of a plasma cutter.
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Answer
A plasma cutter functions by using a high-velocity jet of ionized gas (plasma) to cut through electrically conductive materials with precision.
