How To Get DWG Solids Into Inventor?

Does anyone know how to import 3D solids from a DWG or DXF file into Inventor as solid bodies? I know that you can import 3D solid entities from DWG/DXF files into Inventor, but they come in as surface bodies without volume. Which means that you can make topological modifications like fillets, chamfers and move faces. But solid modeling operations that require closed volumes like extrude, shell, hole, etc. are not possible on surface bodies.

I did find a workaround though. You can stitch the individual faces of the surface body using a Stitch Surface feature, after which solid modeling operations work. I am not sure whether this is the best way to work on DWG solids in Inventor, but this method works. I wonder why Autodesk does not simply import DWG solids as solids in Inventor. Both products use the same underlying modeling kernel, right?

I even created a simply box in AutoCAD. When I got it into Inventor it was a surface body. Maybe I am missing something here. Anyone?

  • http://www.evanyares.com/ Evan Yares

    It’s that 100% DWG compatibilty that Autodesk promises!

    Inventor supports two different types of DWG: Inventor DWG, and AutoCAD DWG. Try opening the DWG as an AutoCAD DWG, if that option is available. Not having Inventor here, I can’t help much more.

  • http://www.evanyares.com Evan Yares

    It’s that 100% DWG compatibilty that Autodesk promises!

    Inventor supports two different types of DWG: Inventor DWG, and AutoCAD DWG. Try opening the DWG as an AutoCAD DWG, if that option is available. Not having Inventor here, I can’t help much more.

  • http://autodeskmfg.blogspot.com/ Steve Bedder

    Hi Deelip,

    I’ve just posted a blog article on http://autodeskmfg.blogspot.com with a quick video of how to get AutoCAD 3D solids into Inventor so they can be worked on as solids.

    Hope it answers your question.

    Steve
    (AutodeskMFG on Twitter)

  • http://autodeskmfg.blogspot.com Steve Bedder

    Hi Deelip,

    I’ve just posted a blog article on http://autodeskmfg.blogspot.com with a quick video of how to get AutoCAD 3D solids into Inventor so they can be worked on as solids.

    Hope it answers your question.

    Steve
    (AutodeskMFG on Twitter)

  • http://www.deelip.com/ Deelip Menezes

    Evan,

    That’s even worse. If you open a DWG file without the DWG/DXF File Wizard, Inventor opens the file in Review Mode. No solid modeling is possible in this mode. The solid model shows up as wireframe with a black background, just like AutoCAD. I could not even find a way to shade the view. In this mode, Inventor becomes more like a pretty useless DWG viewer.

    The way this is set up, this option is meant to be used with DWG files containing 2D entities, not 3D solid models.

  • http://www.deelip.com Deelip Menezes

    Evan,

    That’s even worse. If you open a DWG file without the DWG/DXF File Wizard, Inventor opens the file in Review Mode. No solid modeling is possible in this mode. The solid model shows up as wireframe with a black background, just like AutoCAD. I could not even find a way to shade the view. In this mode, Inventor becomes more like a pretty useless DWG viewer.

    The way this is set up, this option is meant to be used with DWG files containing 2D entities, not 3D solid models.

  • http://www.deelip.com/ Deelip Menezes

    Steve,

    Thanks for the comment and the post. I didn’t uncheck the “Solids to a single part file” box. That’s why I ended up where I did. However, I believe that even with the option checked, the feature recognition routine should have automatically kicked in and converted the surface bodies into solids.

    BTW, how do you convert a surface body into a solid, other than messing it with a Stitch Surface feature? How do I invoke feature recognition manually? If I search for “feature recognition” in the Inventor help file I get no results. The ribbon bar has no mention of feature recognition anywhere on it.

    Clearly, something does not look right.

  • http://www.deelip.com Deelip Menezes

    Steve,

    Thanks for the comment and the post. I didn’t uncheck the “Solids to a single part file” box. That’s why I ended up where I did. However, I believe that even with the option checked, the feature recognition routine should have automatically kicked in and converted the surface bodies into solids.

    BTW, how do you convert a surface body into a solid, other than messing it with a Stitch Surface feature? How do I invoke feature recognition manually? If I search for “feature recognition” in the Inventor help file I get no results. The ribbon bar has no mention of feature recognition anywhere on it.

    Clearly, something does not look right.

  • http://autodeskmfg.blogspot.com/ Steve Bedder

    Hi Again Deelip,

    Apologies for not getting back to you until now, been a bit hectic!

    Anyway, I’ve just posted a new blog article and video – http://autodeskmfg.blogspot.com that goes through how to quickly convert a composite to a solid body by copying the composite to the construction environment where it is automatically stitched.

    To access the Feature Recognition tool you can just right mouse click on the Base solid feature in the model browser and select Feature Recognition. I think I put this in the video too.

    Cheers

    Steve

  • http://autodeskmfg.blogspot.com Steve Bedder

    Hi Again Deelip,

    Apologies for not getting back to you until now, been a bit hectic!

    Anyway, I’ve just posted a new blog article and video – http://autodeskmfg.blogspot.com that goes through how to quickly convert a composite to a solid body by copying the composite to the construction environment where it is automatically stitched.

    To access the Feature Recognition tool you can just right mouse click on the Base solid feature in the model browser and select Feature Recognition. I think I put this in the video too.

    Cheers

    Steve

  • JD Mather
  • JD Mather
  • jccuevasm

    Yo lo he hecho exportando el archivo nativo dwg a SAT, esto haciendo click en archivo. guardar copia como- SAT. o como IGES.

    eso si,l lo hice desde el AutoCAD Mechanical y luego procedi a coser la superficioe para lograr el aspecto de un solido.

  • Piper St. George2

    Great piece , For my two cents , if your company needs a a form , my boss filled out and esigned a sample document here http://qr.net/bSqTC




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