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Details of a Press for cutting circular discs for a board game are shown in Fig - Leaving Cert DCG - Question C-5 - 2012
Question C-5
Details of a Press for cutting circular discs for a board game are shown in Fig. C-5. The parts list and a 3D graphic of the individual parts are also shown below. ... show full transcript
Worked Solution & Example Answer:Details of a Press for cutting circular discs for a board game are shown in Fig - Leaving Cert DCG - Question C-5 - 2012
Step 1
Draw a full size sectional elevation on A-A
Answer
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Begin by laying out the overall dimensions of the press as indicated in the diagram. Ensure that all components are accurately scaled based on the measurements provided in the drawing.
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With the top die fully down, represent the fixed bottom die and the top moving die positioned correctly in relation to the press body.
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Detail the vertical ram within the press body, ensuring that the recess, rib, and holes are marked as indicated in the marking scheme.
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Clearly outline the handle in the correct horizontal position, maintaining the appropriate distance from the press body's edges.
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Ensure all features of the components such as mounting holes and alignment are shown clearly, following the provided dimensions.
Step 2
Determine upper pin centre on handle after vertical movement of ram
Answer
To determine the upper pin center on the handle after the vertical movement of the ram:
- Calculate the total rise of the top die, which is given as 10mm. This will affect the position of the pin.
- Measure from the top of the vertical ram to the center of the upper pin on the handle before and after the vertical movement. The final position should be adjusted to reflect this rise.
Step 3
Determine and indicate angle of rotation
Answer
- Calculate the angle of rotation by using the tangent function. The rise of 10mm can be related to the horizontal distance from the hinge to the center of the handle.
- Use the formula: heta = an^{-1}igg( rac{ ext{rise}}{ ext{horizontal distance}}igg)
- Mark this angle clearly on your drawing for accurate representation and understanding.