How to replace the thickness tool in this case?

[NewJoker]

Hi,

I've found a workaround for this problem: https://forum.freecadweb.org/viewtopic.php?f=3&t=69180

But now I have to hollow out this part to make it look like this:

thickness.png (653.56 KiB) Viewed 946 times

The thickness tool doesn't work here and I'm not really surprised (we all know how unreliable it is). Thus, I need a workaround. Do I have to modify the initial sketch used for the revolution to include the cavity ? How can I make the spherical grooves then ? They have to cut the material from outside but add it in the inside. Should I use some boolean operation ? Is there an easier way ?

I attached the modified FreeCAD file from the linked thread.

Hydrophore system valve cover.FCStd

(538.2 KiB) Downloaded 18 times

Code: Select all

OS: Windows 10 (10.0)
Word size of FreeCAD: 64-bit
Version: 0.20.28774 (Git)
Build type: Release
Python 3.8.13, Qt 5.12.9, Coin 4.0.0, OCC 7.5.3
Locale: Polish/Poland (pl_PL)

[chrisb]

I would go for an initial revolve for the bowl, use grooves or perhaps pockets to make the holes for the cavities and finally add the cavities with a revolve. This will probably leave some material standing out of the bowl, which I would cut with a final groove.

[Haavard]

Here is a 2 minute mockup using partdesign and primitives:

bowl.png (140.71 KiB) Viewed 898 times

[drmacro]

I would go for an initial revolve for the bowl, use grooves or perhaps pockets to make the holes for the cavities and finally add the cavities with a revolve. This will probably leave some material standing out of the bowl, which I would cut with a final groove.

As I did here. But, that is not the gist of this reply... When I save this model the file size is 1.062Mb, but when I attempt to add it to this post I simply get a http error, nothing about file too large, etc. ...confused, 1.062 < 1.46.

[freedman]

I'm guessing the max file size is binary: 2^10 or 1024.

[NewJoker]

Thank you for your help. I completed the model:

bowl.JPG (65.77 KiB) Viewed 790 times

I couldn't make "to last" work properly in the case of a pad creating a rib so I just specified the dimension a bit longer than necessary and used refine at the end. I assume that the internal structure of the model should be correct.

There are some unnecessary lines left that don't disappear with refine set to true but it's not a big deal.

I would share a file but it's too large.

[drmacro]

I'm guessing the max file size is binary: 2^10 or 1024.

Umm ...but, if it's 2^10, then why does the Attachments show:

[freedman]

File size:
I remember testing that once and all I could do was just a few bytes over 1 meg. Could the text stating the size be incorrect, I think it could.

OP, nice model.

[M4x]

I think up to face didn't work because it ends at multiple faces.

Could you upload the model somewhere else? I'd like to have a look.

[NewJoker]

Could you upload the model somewhere else? I'd like to have a look.

Sure, here it is: https://www.dropbox.com/s/93a5xv1b3tgha ... FCStd?dl=0