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Sheet Metal Cone
![kent_henderson](https://profiles.onshape.com/5b4b18b284740efcb5b432319cfea98bd9f18b9e3883110225f096060a83abe6.png)
My world revolves around blow pipe so sheet metal fittings like segmented elbows, Tee-Wyes, square to rounds, etc. I know this isn't where Onshape shines yet. And I probably struggle with this more than I should. What is the easiest way to do a sheet metal cone 36Ø to 18"Ø x 24" tall? The link is the aforementioned as a surface. https://cad.onshape.com/documents/31e74c1cfcf618e5e1b92b4d/w/4729d47a0a7ce052732858af/e/abadd0913450663a1b58944b
I need to unfold this.
I need to unfold this.
0
Best Answer
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lana Onshape Employees Posts: 703
@kent_henderson
Would this work for you?
I've inscribed 24-sided polygons into your circles, making sure that perimeter control point is horizontally aligned with the center.
In this model there is no control over number of polygon segments. If you are satisfied with the approach, It'l be easy to write a feature script with better control.
5
Answers
Would this work for you?
I've inscribed 24-sided polygons into your circles, making sure that perimeter control point is horizontally aligned with the center.
In this model there is no control over number of polygon segments. If you are satisfied with the approach, It'l be easy to write a feature script with better control.
You can also use this custom feature I just made (it supports whole sketches):
https://cad.onshape.com/documents/896f030ae2c1ef8df7e07d34
IR for AS/NZS 1100
https://cad.onshape.com/documents/896f030ae2c1ef8df7e07d34
Could you please make the document public.
Done
IR for AS/NZS 1100
It is very nice, but deceivingly flexible: it'll accept any input and the result would not necessarily be piecewise planar. https://cad.onshape.com/documents/37f19d9c16edeff9601c3317/w/6114098cd84a80ca1a2b9258/e/cca3a41b9c7ff999633b1795
May be restricting the interface to single sketch, height and scale for the second profile would be a more robust solution. Not sure how useful.
It now tells you if there are non-planar faces generated by the feature and gives you an option to fix them (replace with triangles).
IR for AS/NZS 1100
Very nice.
IR for AS/NZS 1100