fillet on curved intersections

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zvoros
Posts: 6
Joined: Sun Jul 08, 2018 9:05 am

fillet on curved intersections

Postby zvoros » Sun Jul 08, 2018 10:00 am

Hi all,

I am trying to define an enclosure as the intersection of a rectangular cuboid and two cylinders, and I would like to add fillets to all edges, except four.

However, freecad does not allow me to: even if the edges/faces are selected, and I choose "Fillet" from the menu, I get the "Select an edge, face or body from an active body." message, but I can't activate the body, because as soon as I try to select an edge, the top-level object, a common, will become active.

Image

I have also tried making the cylinder as a surface of revolution, or taking it from the standard objects in the Part workbench, but that does not change the situation.

In any case, I would appreciate, if someone could shed some light on the problem. I am quite sure I miss something totally trivial.

Thanks,

Zoltán

OS: Ubuntu 18.04 LTS
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.17.13522 (Git)
Build type: None
Branch: releases/FreeCAD-0-17
Hash: 3bb5ff4e70c0c526f2d9dd69b1004155b2f527f2
Python version: 2.7.15rc1
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.2.0
Locale: English/UnitedStates (en_US)
Attachments
Screenshot from 2018-07-08 11-59-20.png
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test2.fcstd
(26.63 KiB) Downloaded 5 times
chrisb
Posts: 21463
Joined: Tue Mar 17, 2015 9:14 am

Re: fillet on curved intersections

Postby chrisb » Sun Jul 08, 2018 10:22 am

Hi Zoltán, welcome. You have probably used the PartDesing fillet which works only inside of a body, which you have left when you applied the Part->Common operaton. Use the Part Fillet instead.
chrisb
Posts: 21463
Joined: Tue Mar 17, 2015 9:14 am

Re: fillet on curved intersections

Postby chrisb » Sun Jul 08, 2018 10:26 am

I forgot: For Boolean Common you can use 3 elements as well. That saves you one common operation and one nesting level.
zvoros
Posts: 6
Joined: Sun Jul 08, 2018 9:05 am

Re: fillet on curved intersections

Postby zvoros » Sun Jul 08, 2018 10:27 am

Greetings Chris,

Indeed, that was the problem. Thanks for the clarification!

Zoltán
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meme2704
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Location: Vosges

Re: fillet on curved intersections

Postby meme2704 » Sun Jul 08, 2018 10:34 am

Hi zvoros
It seems to me that during the comun operation you took out the object of the body, so you can no longer use Partdesign, if you take Part Wb, filet works
Competitors than me, will tell you how to stay in the body
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zvoros
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Re: fillet on curved intersections

Postby zvoros » Sun Jul 08, 2018 10:44 am

meme2704 wrote:
Sun Jul 08, 2018 10:34 am
Competitors than me, will tell you how to stay in the body
I think the two parts are automatically moved one level, when you apply the Boolean operation.
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NormandC
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Location: Québec, Canada

Re: fillet on curved intersections

Postby NormandC » Sun Jul 08, 2018 3:45 pm

Hello Zoltán,

Your test model could be done more efficiently.

You made three separate PartDesign bodies, then you left the PartDesign workbench and used the Part workbench. You didn't need to leave the PartDesign workbench: there is a PartDesign Boolean feature that would have allowed you to end up with a single Body and stay in PartDesign.

But you could also have made it in a single PD Body with only 2 sketches, one Pad and one Pocket. (meme2704: try to do better in v0.16 ;) )
Attachments
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test2_PDBoolean_nc1.fcstd
(34.8 KiB) Downloaded 10 times
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meme2704
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Location: Vosges

Re: fillet on curved intersections

Postby meme2704 » Sun Jul 08, 2018 4:21 pm

(meme2704: try to do better in v0.16 ;) )
mais je l'ai fait en v0.17 :mrgreen: But i tray

10mn later, in V0.16
Where is the trap :?:
and I did not get lost in the skirts of the female bodies
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NormandC
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Re: fillet on curved intersections

Postby NormandC » Sun Jul 08, 2018 5:19 pm

You did not post your file. But I am certain that you do not have only one pad and one pocket like in my file. So you needed more steps than I.

meme2704 wrote:
Sun Jul 08, 2018 4:21 pm
and I did not get lost in the skirts of the female bodies
At the expense of needing more steps.
zvoros
Posts: 6
Joined: Sun Jul 08, 2018 9:05 am

Re: fillet on curved intersections

Postby zvoros » Sun Jul 08, 2018 7:32 pm

NormandC wrote:
Sun Jul 08, 2018 3:45 pm
Hello Zoltán,

Your test model could be done more efficiently.

You made three separate PartDesign bodies, then you left the PartDesign workbench and used the Part workbench. You didn't need to leave the PartDesign workbench: there is a PartDesign Boolean feature that would have allowed you to end up with a single Body and stay in PartDesign.
Normand,

Thanks for the hints, and extra thanks for the corrected freecad files!