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A prototype of the camera handle shown is turned on a centre lathe - Leaving Cert Engineering - Question c - 2020
Question c
A prototype of the camera handle shown is turned on a centre lathe. (i) Describe, with the aid of diagrams, three operations used in making the camera handle on a c... show full transcript
Worked Solution & Example Answer:A prototype of the camera handle shown is turned on a centre lathe - Leaving Cert Engineering - Question c - 2020
Step 1
Describe, with the aid of diagrams, three operations used in making the camera handle on a centre lathe.
Answer
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Parallel Turning: This operation involves reducing the diameter of the metal to achieve the desired size. A cutting tool moves along the length of the workpiece to ensure uniform diameter.
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Facing: In this step, the front end of the workpiece is machined to create a smooth finish. The cutting tool moves perpendicular to the axis of the workpiece.
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Centre Drilling: This operation involves drilling a hole into the workpiece. It is essential for creating a starting point for further cutting and ensures that the drill is aligned correctly.
Step 2
Explain, with the aid of diagrams, the differences between generating and forming in machining processes.
Answer
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Generating: This process creates the workpiece shape by moving the cutting tool along a predefined feed trajectory. Examples include straight turning, taper turning, and profile milling. The shape is primarily determined by the tool path.
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Forming: In contrast, forming involves shaping the workpiece according to the contours of the cutting tool itself. This can include operations like form turning and drilling. The shape of the tool directly impacts the final form of the workpiece.