Tube|Pipe notch

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Gatze
Posts: 6
Joined: Thu May 25, 2017 5:54 am

Tube|Pipe notch

Postby Gatze » Fri Oct 11, 2019 7:13 pm

Hello everyone,

New to Freecad (from mosty Inventor, but in my education also Solid Works and Solid Edge), just trying some stuff. I already searched the forum but could not find a satisfactory answer.

I don't know if it is the right English term, but I want to make a notch in a tube with an 45 degree angle. I already could make a datum plane with such an angle. Now I want to draw a circle with the same size on the showed datum plane as the pipe I want to notch.

The problem is, how can I 'align' the circle using for the pocket on the datum plane with the center of the end of the pipe (I marked it with a datum point) ? In that way I can cut the pipe exactly in the center of the end of the pipe.

In Inventor I would solve it with 'Project Geometry' and would use the circle from the end of the pipe. It would have shown as an Elips on the sketch and would take the centre. I tried with 'Create an edge Linked to a external Geometry' but that I couldn't figure out.

Maybe there is an easier way to do it, I would like to hear about it of course...
Attachments
tube notch.png
Tube|pipe notch
tube notch.png (141.24 KiB) Viewed 483 times
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pl7i92LCNC
Posts: 209
Joined: Tue Mar 12, 2019 3:03 pm
Location: RLP DE

Re: Tube|Pipe notch

Postby pl7i92LCNC » Fri Oct 11, 2019 7:40 pm

first
Welcome

so it is mutch easyer as you think
the 45Deg do not count as a simple notch
goto PART workbench (WB)
make a cube
position the cube with the right dimation in DATA where to cut
and make a boolean
chrisb
Posts: 24399
Joined: Tue Mar 17, 2015 9:14 am

Re: Tube|Pipe notch

Postby chrisb » Fri Oct 11, 2019 7:50 pm

Hi and welcome to the forum!

You can attach the DatumPlane with attachment mode "Concentric" to the end of the tube. This is ok, but not the most robust possibility. For that you should attach it to a sketch or one of the main planes plus using an expression to get the offset.
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Willem
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Location: Lisse, The Netherlands

Re: Tube|Pipe notch

Postby Willem » Sat Oct 12, 2019 3:28 pm

For designing in piping you should study the "Dodo"workbench.
Also the Arch workbench has some simple piping functions
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bejant
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Joined: Thu Jul 11, 2013 3:06 pm

Re: Tube|Pipe notch

Postby bejant » Sat Oct 12, 2019 4:09 pm

Gatze wrote:
Fri Oct 11, 2019 7:13 pm
I want to make a notch in a tube with an 45 degree angle. I already could make a datum plane with such an angle. Now I want to draw a circle with the same size on the showed datum plane as the pipe I want to notch.
...snip...
Maybe there is an easier way to do it, I would like to hear about it of course...
Hi Gatze, welcome to the forum! I'll add another method. For your first attempt you could try making the notch at the Origin end of the pipe because it's easier to use the Data Tab > Property > Attachment Offset to rotate the Sketch around the origin than to try and rotate the Sketch to match the other end of the pipe. Here's an example done in the Part Design WB:


20191012a.png
20191012a.png (26.58 KiB) Viewed 418 times

20191012a-AngledPipePocket.FCStd
(45.62 KiB) Downloaded 12 times


OS: Ubuntu 16.04.6 LTS
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.1.
Build type: Release
Python version: 2.7.12
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/UnitedStates (en_US)
Gatze
Posts: 6
Joined: Thu May 25, 2017 5:54 am

Re: Tube|Pipe notch

Postby Gatze » Sat Oct 12, 2019 5:22 pm

Thank you all for the respons, I will look into the Workbenches. I can reproduce the last post, thanks !

Following thing I want to try is that for welding it is desirable that the thickness of the notch is the same all around, so I want the surface of the end of the pipe 90 degree to the axis of the pipe. I attached an image. First I try myself, if I cannot figure it out the I come back here ;)
Attachments
tubenotchinventor.png
tubenotchinventor.png (174.47 KiB) Viewed 408 times
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GlouGlou
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Location: La Rochelle, France

Re: Tube|Pipe notch

Postby GlouGlou » Sat Oct 12, 2019 5:45 pm

You can use a master sketch. ;)
Attachments
Capture.PNG
Capture.PNG (44 KiB) Viewed 401 times
notch.FCStd
(52.63 KiB) Downloaded 13 times
Gatze
Posts: 6
Joined: Thu May 25, 2017 5:54 am

Re: Tube|Pipe notch

Postby Gatze » Sun Oct 13, 2019 7:55 am

Thank you, 👍
Gatze
Posts: 6
Joined: Thu May 25, 2017 5:54 am

Re: Tube|Pipe notch

Postby Gatze » Sun Oct 13, 2019 12:58 pm

This is what I'm looking for:
https://www.youtube.com/watch?v=x3UaqbAN4eQ

But I don't think it is possible, I have try still.
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Willem
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Location: Lisse, The Netherlands

Re: Tube|Pipe notch

Postby Willem » Sun Oct 13, 2019 1:32 pm

In the Part workbench you can use this cutout function
Schermafdruk van 2019-10-13 15-29-40.png
Schermafdruk van 2019-10-13 15-29-40.png (50.47 KiB) Viewed 345 times
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