Help. How to correctly 'stamp' a complex body?

[michroz]

Hello!
Please help!
I need a method to create a 'stamped' body as if another complex body would 'stamp' into it like into clay.

In other words, the body surface must almost negatively replicate the stamp surface. Almost  - because it should not replicate the cavities of the stamp, which are not 'seen' if looked perpendicular from the flat clay surface which is supposed to be 'stamped'. In other words, the bodies must be physically detachable after the 'stamp' action.
I planned to use 'extrude to object' from the stamped surface to the stamp body. However, the resulting body is not only extruding to the nearest stamp surface faces but also fills in the invisible cavities (despite the 'Min Solution' option in the extrude feature). Basically, this works like 'extrude as new body and combine - cut', not like extrude to object. 

I suspect this may be a bug in Fusion 360 extrusion to object, because this is not what obviously expected. But I might be wrong.
I believe it must be a pretty common situation if one wants to 'press' a complex object to a sort of 'model clay' and receive an exact and removable imprint. (I personally would like to place a complex 3d-printed object on a flat 3d-printed removable stand). But I could not find a solution. Please help.

I attach a simple file to explain the problem visually. There is a 'complex 'Stamp' body, which is 'stamped' into cylindrical 'Clay'. The 'Not Correct' body is the result of 'extrude to Stamp object'. Notice the material fills the Stamp cavities. The 'Correct' body is the result I'd like to receive (in this simple example I managed to get the correct result by an obvious workaround, which is not acceptable in case of more complex - e.g. mesh - stamp body).
Thank you in Advance!

Mich
   


  

[chrisplyler]

Edit: sorry responded to wrong thread...

[wmhazzard]

It is not clear to me what you want as your correct and incorrect bodies look exactly the same to me. Are you trying to take a body and cut out another body to use the second body as a stand?

[chrisplyler]

There is no such one-shot feature in Fusion. You'll have to manually decide what gets cut out of the clay and what doesn't.

Note: In my video, I move the stamp up and extrude down from the appropriate faces. This isn't necessary. I only did it for visual clarity. You could just as easily leave the stamp where it is, and extrude up to the bottom of the stamp's handle from those same two faces. The trick is to make sure the extrude cuts only the clay.

https://knowledge.autodesk.com/community/screencast/a9386288-6a9a-45fd-b407-cd16e6cc8a6b

a9386288-6a9a-45fd-b407-cd16e6cc8a6b,640,620

[michroz]

Sorry - Correct and Not Correct bodies are different inside - check the
section analysis and the visibility feature to see the difference.
Yes, I am trying to take a body and cut out another body to use the second
body as a [removable] stand.
Thanks!

[chrisplyler]

Side note: The stamp and the clay should be separate Components.

[michroz]

Thank you for your reply. As I probably mentioned, the _real_ stamp is too
complex (actually a converted mesh), which makes the 'cut face-by-face'
plan real hard to implement. Unfortunately, the extrude feature does not
allow selecting multiple faces, not to speak of multiple angled faces.
It's a pity a set of angled faces cannot be extruded at once in an
arbitrary direction...
Or, actually, the 'extrude to object' would be enough, if it worked like I
thought it should have been working.

[TheCADWhisperer]

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@michroz wrote:
 As I probably mentioned, the _real_ stamp is too
complex (actually a converted mesh)...

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Can you Attach the real part here?

[michroz]

Thank you. The problem at this point lies in 3d-modeling. The 3d-printing
problems will follow,
Thanks, anyway,

[michroz]

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@TheCADWhisperer wrote:

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@michroz wrote:
 As I probably mentioned, the _real_ stamp is too
complex (actually a converted mesh)...

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Can you Attach the real part here?

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No, I cannot. The file is too big. But the problem is the same as in the test file I attached: The 'stamping' surface has 'cavities' - the areas which are not directly 'visible' from the position of the 'Clay'. Only that in the real case the number of faces on the stamp makes it not practical to extrude each face as needed (like it is possible to do in the test file).   

[TheCADWhisperer]

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@michroz wrote:

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 The file is too big.   

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Then provide a link to the file from your Dashboard.