Help to model complex pocket

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Help to model complex pocket

Postby DLG » Fri Jul 13, 2018 11:17 am

Hello everyone :) ,

I have been using FreeCad since little less than two months, and I'm coming to you with a quick question, I want to create a pocket inside a solide, but I don't know how to.

The pocket itself is rather complex, I could describe it at an elliptical cone, which would have its end flattened.

It starts with a circle with a diameter of 8 mm and ends up with a large slot, with a height of 5 mm and a width of 35 mm,
FreeCad help.jpg
FreeCad help.jpg (21.33 KiB) Viewed 191 times
but the pocket itself is tilted.
FreeCad help 2.jpg
FreeCad help 2.jpg (45.81 KiB) Viewed 191 times
As you can see on the attached figures, I have designed the two shapes on the two faces of the solid so that you can better see what I want to achieve.

Basically, I'd like FreeCad to create the pocket using those two shapes as starting and end shapes, but I don't know how to do this, or even if that's possible.

Any ideas on how to achieve this ?

Thank you very much !

Btw, here are my version infos:

OS: Windows 10
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.17.13522 (Git)
Build type: Release
Branch: releases/FreeCAD-0-17
Hash: 3bb5ff4e70c0c526f2d9dd69b1004155b2f527f2
Python version: 2.7.14
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.2.0
Locale: English/Singapore (en_SG)
Posts: 11401
Joined: Tue Mar 17, 2015 9:14 am

Re: Help to model complex pocket

Postby chrisb » Fri Jul 13, 2018 11:28 am

Hi DLG, welcome to the forum.
If you have modeled your cube in PartDesign workbench you create a subtractive loft.
If you have modeled in Part workbench you create a loft and make a boolean cut.

In both cases it works best if you change the circle to consist of several segments matching the segments of the slot.
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Re: Help to model complex pocket

Postby meme2704 » Fri Jul 13, 2018 12:17 pm

I made it in Part Wb
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Re: Help to model complex pocket

Postby Willem » Sat Jul 14, 2018 9:34 am

Hi, this model can also be made in the Part design workbench using the subtractive loft function
Schermafdruk van 2018-07-14 11-32-09.png
Schermafdruk van 2018-07-14 11-32-09.png (190.56 KiB) Viewed 137 times
Subtractive loft.fcstd
(24.16 KiB) Downloaded 5 times
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Re: Help to model complex pocket

Postby DLG » Mon Jul 16, 2018 2:25 am

Thanks a lot guys, that was really helpful of you !