51 sheet metal engineering
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8/8/2019 51 Sheet Metal Engineering
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SHEETMETAL
ENGINEERING
Answer the questions below to help the Manager solve this problem:
1. What is the area of the whole sheet?
2. What is the area of one hole?
3. How many holes are on a complete sheet?
4. How far apart do the holes need to be for a square grid?
5. How far apart do the holes need to be for a triangular grid?
The Manager of “Trevaskis Engineering Pty Ltd” pondered the problem
that his most recent customer had given him. “I need a 50%
perforated rectangular sheet (900 x 600) of metal with 10mm holes”.
He thought: “What spacing should I have between the circles so that
there is exactly 50% metal and 50% holes? Should the centre of the
holes be in a square or triangular grid?”
“I’ve changed my mind” the customer said. “I want a perforated sheet
with 16mm holes”. What hole centres are needed now for a 50% open
perforated sheet?
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