Tutorial: Request, Perforated tubing
its simple and easy. Just wrap and patterns.
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Step 1:
Sketch on right plane, for tube's body.
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Step 2:
extrude it to what ever the length of tube you want.
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Step 3:
Sketch this on the top plane.
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Step 4:
Select wrap feature.
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Step 5:
Create a de boss wrap feature.
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Step 6:
Make a circular pattern of the wrap feature.
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Step 7:
Create this sketch on the top plane, must have straight lines parallel to axis of the tubing.
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Step 8:
Surface extrude it, use any length you want. This just a helper surface for the linear pattern.
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Step 9:
Make a linear pattern, in second direct, pattern seed only. Same distance in both directions, obviously.
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Step 10:
Delete the surface body.
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Step 11:
The finished part.