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Chris3
Chris321-Topaz I
21-Topaz I
February 22, 2024
Solved

Lattice by shelling

Before I open up an idea on this does anyone know of a way to shell a part but replace the shell with a lattice? Or convert the remove shelled volume to a body so I can use that for a lattice?

tbraxton
tbraxtonAnswer
22-Sapphire II
February 28, 2024

@Chris3 The documentation regarding the definition of a lattice region (domain) is lacking. It is confusing and needs clarification. The lattice tool supports what I think you are asking for already, see the enclosed video for a trivial example of how to do it.

 

Taken from this link:To Define the Lattice Region (ptc.com)

 

The term "closed" here is misleading in the context of surface modeling in Creo. Closed volume in the context of Creo surface modeling (core or ISDX) has always been presented to mean a watertight quilt without any gaps or openings.

 

"The selected surfaces, quilts, and datum planes should create a closed volume. The arrow should point toward the inside of the volume."

 

(view in My Videos)

 

tbraxton_0-1709084430692.gif

 

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10 replies

Dale_Rosema
Dale_Rosema23-Emerald IV
23-Emerald IV
February 22, 2024

I sat in on a presentation at the recent PTC User's conference about Additive Manufacturing. They were presenting ways to do this and then to optimize the pattern to reduce the need for structural supports. You may need to have an add-on to do this. I do not use this where I work.

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Dale_Rosema
Dale_Rosema23-Emerald IV
23-Emerald IV
February 22, 2024

https://community.ptc.com/t5/Creo-Parametric-Tips/Creo-Additive-Manufacturing-Tips-Techniques-Session-Recording/ta-p/820811

 

This may have been the demo used.

They start with an open body and a shell body if I remember correctly.

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    Chris3
    Chris321-Topaz IAuthor
    21-Topaz I
    February 22, 2024

    They aren't using a shell feature in that demo.

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    MartinHanak24-Ruby III
    24-Ruby III
    February 22, 2024

    Hi,

    see attached model (Creo 7.0).

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    Chris3
    Chris321-Topaz IAuthor
    21-Topaz I
    February 22, 2024

    This is close, but you had to create a surface to cap the shelled area. That is easy to do when you have flat surfaces. Its harder to do with more complex geometry.

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    tbraxton
    tbraxton22-Sapphire II
    22-Sapphire II
    February 22, 2024

    The demo provides the methods that should be readily extrapolated to use with the shelled geometry. Can you post your model or at least a picture of your shell geometry? You can use a copy feature to capture a closed shape of the shell before any holes are in the shelled geometry. Apply the lattice to the unblemished continuous closed copy of the shelled geometry core quilt.

     

    It sounds like you may have a geometry that is problematic with respect to reducing the lattice to practice but without seeing it I am not able to offer much specific input on how to deal with it.

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    tbraxton
    tbraxton22-Sapphire IIAnswer
    22-Sapphire II
    February 28, 2024

    @Chris3 The documentation regarding the definition of a lattice region (domain) is lacking. It is confusing and needs clarification. The lattice tool supports what I think you are asking for already, see the enclosed video for a trivial example of how to do it.

     

    Taken from this link:To Define the Lattice Region (ptc.com)

     

    The term "closed" here is misleading in the context of surface modeling in Creo. Closed volume in the context of Creo surface modeling (core or ISDX) has always been presented to mean a watertight quilt without any gaps or openings.

     

    "The selected surfaces, quilts, and datum planes should create a closed volume. The arrow should point toward the inside of the volume."

     

    (view in My Videos)

     

    tbraxton_0-1709084430692.gif

     

    Translate
      MartinHanak24-Ruby III
      24-Ruby III
      February 28, 2024

      Result of my test ... procedure described in video works for following model (Creo 10.0), too.

      MartinHanak_0-1709111388806.png

       

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