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6. Name any three of the lathe turning operations shown below: (i) (ii) (iii) (iv) (b) Describe any three of the following terms associated with drilling: (i) Pilot hole (ii) Countersink hole (iii) Clearance hole (iv) Blind hole (c) Sketch a lathe cutting tool showing any two of the following angles: (i) Top rake (ii) Front clearance (iii) Side clearance - Leaving Cert Engineering - Question 6 - 2007
Question 6
6. Name any three of the lathe turning operations shown below: (i) (ii) (iii) (iv) (b) Describe any three of the following terms associated with drilling: ... show full transcript
Worked Solution & Example Answer:6. Name any three of the lathe turning operations shown below: (i) (ii) (iii) (iv) (b) Describe any three of the following terms associated with drilling: (i) Pilot hole (ii) Countersink hole (iii) Clearance hole (iv) Blind hole (c) Sketch a lathe cutting tool showing any two of the following angles: (i) Top rake (ii) Front clearance (iii) Side clearance - Leaving Cert Engineering - Question 6 - 2007
Step 1
Name any three of the lathe turning operations shown below:
Answer
- Parting off: This operation involves removing material to separate sections of the workpiece.
- Taper turning: This involves creating a conical shape on the workpiece by cutting at an angle.
- Facing: This operation flattens the end of the cylindrical workpiece, giving it a smooth finish.
Step 2
Describe any three of the following terms associated with drilling:
Answer
- Pilot hole: A pilot hole is a small hole drilled to guide larger drills. It ensures centering and stability during drilling.
- Countersink hole: This is a conical hole at the mouth of another hole, allowing screws or rivets to sit flush with the surface, formed using a countersink cutter.
- Clearance hole: This hole is slightly larger than the machine screw passing through it, permitting quick insertion and accommodating alignment changes.
Step 3
Sketch a lathe cutting tool showing any two of the following angles:
Answer
In the sketch, label the following angles:
- Top Rake: The angle that contributes to improved cutting efficiency by allowing the tool to shear material more effectively.
- Front Clearance: The angle that prevents the cutting edge from dragging on the workpiece, which can enhance tool longevity.
Step 4
Explain any two of the following engineering technology terms:
Answer
- CAM (Computer Aided Manufacture): This technology uses computer software to control machine tools in the manufacturing process, ensuring precision and efficiency.
- CNC (Computer Numerical Control): CNC involves the automated control of machining tools via computers, leading to high precision and repeatability in production.