Name any three of the lathe work-holding methods shown - Leaving Cert Engineering - Question 6 - 2011
Question 6
Name any three of the lathe work-holding methods shown.
(i) State two reasons for using cutting fluids when machining.
(ii) List one safety precaution to be observ... show full transcript
Worked Solution & Example Answer:Name any three of the lathe work-holding methods shown - Leaving Cert Engineering - Question 6 - 2011
Step 1
Name any three of the lathe work-holding methods shown.
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Answer
Jaw self-centering chuck
Fixed three-point steady
Four-jaw independent chuck
Face plate
Step 2
State two reasons for using cutting fluids when machining.
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Answer
To improve surface finish by providing lubrication, which reduces friction between the tool and workpiece.
To allow faster cutting speeds by dissipating heat generated during the machining process.
Step 3
List one safety precaution to be observed when using cutting fluids on the centre lathe.
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Change cutting fluid regularly to reduce rancidity and maintain effectiveness.
Step 4
Name the cutting-tool angles labelled A and B.
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A is the Rake angle.
B is the Clearance angle.
Step 5
State the function of any one of the cutting-tool angles A and B.
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Answer
Rake angle: It aids in the removal of the chip being cut. Increasing the rake reduces the amount of power consumed in cutting and reduces the heat generated.
Step 6
Explain any three of the following Computer Numerical Control (CNC) machining terms:
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CAD: Computer Aided Design is used for the creation of 2D or 3D drawings. It helps visualize design ideas and streamline the development process.
Simulation: This involves running a simulated program for the CNC machine to detect errors without damaging the material being used.
G Codes: These are commands that dictate the movement of the tool along specified coordinates during machining, ensuring precision in operations.
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