Projection of wires (faces) on bended faces

[apeltauer]

Hi all,

i am playing around with the BRepProj_Projection which is include in OpenCascade to project wires / faces to an uneven surface/surfaces to achieve something link in the pics.

Capture.PNG (80.32 KiB) Viewed 724 times

Capture2.PNG (15.22 KiB) Viewed 724 times

But after playing around i bit, i found some problems which i think are not too easy to handle.
The resulting wire is correct and good. Even on multiple faces. I tested it with a zig zag surface and the wire looks quite good.

Capture3.PNG (46.12 KiB) Viewed 724 times

Capture4.PNG (32.43 KiB) Viewed 724 times

But when it comes to do something with the wire it gets complicated. For example making a face out of it, to extrude it and make a boolean cut with the surface.

So my question is, is there anyone out there who has already played with this and has some experience how this can be handled? Or does anyone has already created a macro or an implementation for this?
I think this would be a nice new feature for FreeCad if it could project logos, texts or etc on an uneven surface. Just thinking for milling or 3d printing.....

What do you guys think about this?? Hope for some comments.....

BR Manuel

OS: Windows 10
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.15513 +1165 (Git)
Build type: Release
Branch: wb_apeltauer_integrate_3d_milling
Hash: 3918225ec0c1ebbb2dde10cd8c9f7693990fd1d9
Python version: 2.7.8
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.0.0
Locale: English/Germany (en_DE)

[chrisb]

The second image looks already as if you have a solid? If you can upload a file containing sich a wire, and you tell us what you want to do, there migh come up some ideas.

[apeltauer]

The first and seconde picture is an cut which i made with the logo as a solid. By creating the solid i cheated a little bit to show how it should looks.
The "F" solid was not that difficult, but with the gear i had to create the face with the outer wire and then created a circle to cut the hole. That is why the circle is not in the middle of the gear.
If i try to make the same thing on the zig zag surface this does not work, because i can not make any face out of the wires.
Maybe someone can also try this??

In the attached FC file i have added mainly 3 Parts:
Fc Logo Done --> is the solid with the cheated cut
FC-Logo --> is the sketch from the svg i have imported
FC-Logo Wire Bended --> is the wire of the logo on the bended surface
FC-Logo Zig Zag --> is the wire of the logo on the zigzag surface

Capture.PNG (62.13 KiB) Viewed 695 times

[chrisb]

I only managed to create a Loft, but it was not possible to make it solid.

[apeltauer]

I think the first step would be to concentrate on a single face.
I tried it with another logo, see the pic

Capture3.PNG (72 KiB) Viewed 642 times

I think the result is quit good. (The file is now over 3mb, so i cannot upload the file here, but if some wants the file i can upload it somewhere)

After playing around with some other geometries i came across with a failed boolen cut. I was able to create a solid and extrude this, but when it comes to a cut i get the following.... a black surface and two cuts which are not in the solid

Before the cut

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After the cut

Capture2.PNG (53.87 KiB) Viewed 642 times

Does anyone know what this means and how this can be fixed??
Br Manuel

[GlouGlou]

Have a look inside my file, if It could help you.

OS: Windows 10
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.15515 (Git)
Build type: Release
Branch: master
Hash: be5796b2d0d06adb69c81eece63df54b64965bd6
Python version: 2.7.14
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.2.0
Locale: French/France (fr_FR)

[apeltauer]

Thanks for the file.
I will have a look at it tomorrow morning....

[apeltauer]

@GlouGlou thanks for file.
I checked your file but my goal is to get a cut with the same heights on the surface.
See the pick, if we just make a linear extrude we get different heights. If we would make a 3d print this wouldn't look nice....

Capture.PNG (70.94 KiB) Viewed 546 times

Thanks for all your help so fare....

[GlouGlou]

And like this?

[apeltauer]

Will try this tomorrow morning...
Thanks for the file...