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Answer any three of the following: (i) Explain the difference between loading and glazing of grinding wheels - Leaving Cert Engineering - Question b - 2020
Question b
Answer any three of the following: (i) Explain the difference between loading and glazing of grinding wheels. (ii) Describe two hazards associated with the process... show full transcript
Worked Solution & Example Answer:Answer any three of the following: (i) Explain the difference between loading and glazing of grinding wheels - Leaving Cert Engineering - Question b - 2020
Step 1
Explain the difference between loading and glazing of grinding wheels.
Answer
Loading refers to the condition when a grinding wheel becomes filled with small particles due to grinding debris accumulating between the abrasive grains and the wheel. This can lead to poor grinding performance, as it inhibits the wheel from effectively cutting the work piece.
Glazing, on the other hand, occurs when the abrasive particles on the cutting surface of the wheel become dull and fail to cut effectively. The grinding wheel essentially becomes smooth, which hinders material removal from the work piece.
Step 2
Describe two hazards associated with the process of laser cutting.
Answer
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Fumes require ventilation: The laser cutting process produces fumes, so proper ventilation is crucial to avoid respiratory hazards.
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Laser light damage to eyes and skin: Direct exposure to the laser beam can cause severe eye injuries or skin burns, necessitating appropriate protective gear.
Step 3
Outline the advantages of thread rolling.
Answer
Thread rolling is extensively used in manufacturing screws, bolts, and other fasteners. Its advantages include:
- High production rates due to automation, which improves efficiency in mass production.
- Stronger threads than those produced via cutting methods, as the thread structure is more resilient and less prone to distortion during the forming process.