Freecad Idomatic Method for Radial Cylindrical Cutouts
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- Shalmeneser
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Re: Freecad Idomatic Method for Radial Cylindrical Cutouts
Do not look at Placement, but Attachment.
Re: Freecad Idomatic Method for Radial Cylindrical Cutouts
It is not the same, Chris.
And I am afraid that Willem's solution is incorrect. See my remark somewhere lower in this thread as a response to Willem.
Greetz
Roland
Last edited by Roland on Sun Aug 01, 2021 11:15 pm, edited 1 time in total.
Re: Freecad Idomatic Method for Radial Cylindrical Cutouts
Well, that Attachment is wrong as it intersects with the origin! So, I agree with you: we need a datumplane. At least one.
And if you want to use the Groove feature, you need also to find the axis around which to sweep the sketch, and that axis is NOT the Z axis of this model.
.
Perhaps this illustration helps to better grasp the matter: See also the comment by Papyblaise.
I am trying some more potential solutions inside Part Design. So far I could only manage with a combination of Part Design ad Part.
Happy modelling!
Roland
Last edited by Roland on Sun Aug 01, 2021 11:25 pm, edited 3 times in total.
- Shalmeneser
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- Location: Fr
Re: Freecad Idomatic Method for Radial Cylindrical Cutouts
Sketch002 : Support : DatumPlane(000)
DatumPlane(000) :
* Support : YZ_Plane
* Attachment : Y angle = 45°
DatumPlane(000) :
* Support : YZ_Plane
* Attachment : Y angle = 45°
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Re: Freecad Idomatic Method for Radial Cylindrical Cutouts
I see what you mean. Yes, it is not a circle.Roland wrote: ↑Sun Aug 01, 2021 9:34 pmMarkster, I think that your solution is wrong because what should have been a circular cylindrical surface is actually an elliptical cyclinder. This is because you sweep a circle along an angled direction.TheMarkster wrote: ↑Sun Aug 01, 2021 9:22 pm Could be there are better or more efficient ways to do it.
Best regards,
Roland
Edit: but looking at the original picture it appears it could be elliptical. It is hard to say from the image.
Re: Freecad Idomatic Method for Radial Cylindrical Cutouts
Seems like that is very easy to remedy. Just make two profile sketches at the correct angles instead of trying to make do with one in the middle.
Gene
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Re: Freecad Idomatic Method for Radial Cylindrical Cutouts
Yes, that would be the way to do it, assuming you want circles for those faces. I'm not yet convinced that is what the original is depicting.
Re: Freecad Idomatic Method for Radial Cylindrical Cutouts
Hi
Do you think I got it?
hpb
OS: Windows 10 (10.0)
Word size of FreeCAD: 64-bit
Version: 0.20.25334 (Git)
Build type: Release
Branch: master
Hash: 433c52c290681992346b6cda6482bf6a73d74e25
Python version: 3.8.10
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.5.2
Locale: German/Switzerland (de_CH)
Do you think I got it?
hpb
OS: Windows 10 (10.0)
Word size of FreeCAD: 64-bit
Version: 0.20.25334 (Git)
Build type: Release
Branch: master
Hash: 433c52c290681992346b6cda6482bf6a73d74e25
Python version: 3.8.10
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.5.2
Locale: German/Switzerland (de_CH)
- Attachments
-
- Flange_hpb.FCStd
- (219.91 KiB) Downloaded 39 times
- papyblaise
- Veteran
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- Location: France
Re: Freecad Idomatic Method for Radial Cylindrical Cutouts
See the solution of hpbmoIf someone can do without the Datum plane ...
I was going to offer you another one, but it's useless, it's up to you to invent one
- Attachments
-
- flange2.FCStd
- (355.51 KiB) Downloaded 33 times
Re: Freecad Idomatic Method for Radial Cylindrical Cutouts
Almost. Fillets which consume the whole adjacent face and touch the thext edge frequently fail. So I'm afraid this solution works just here.
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