Smooth surface between 2 lofts

[Anonymous]

Hello,

I am trying to obtain a smooth surface between 2 lofts.  Right now, the model shows a bit of an indentation near the front of the part.  The lofts seem to be caving open themselves.  Any ideas on how to solve this issue?  Thank you!

Please see attached file below.

[Anonymous]

use 1 loft rather than 2.  you wont be able to open my 2011 copy and also get those sketches fully constrained

[Anonymous]

Is it possible to get this shape with only one loft?  How would I go about doing that?  Does that require new sketches?

[JDMather]

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@Anonymous wrote:

Is it possible to get this shape with only one loft?  How would I go about doing that?  Does that require new sketches?

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Yes, but that is not going to solve your problem - it is going to take a bit more work.  How familiar are you with 3D intersections?

[Anonymous]

Are 3D intersections things like using the join and intersect options when extruding?  Off hand, I do not know what are 3D intersections. 

Also is there a way to highlight these "curved" problem areas?  I think the curvature near the front is obvious to viewers, but there might be other ripples that are not lofting properly. 

[JDMather]

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@Anonymous wrote:

...I do not know what are 3D intersections. 

...there might be other ripples that are not lofting properly. 

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3D sketch - you might do these tutorials.

http://home.pct.edu/~jmather/content/DSG322/inventor_surface_tutorials.htm

... there are built in Inspection tools - but this looks like a user error, not a lofting error.

You might also search Google for Ed Eaton Curvy Stuff Tutorials DiMonte Group.  Written for a different SW, but the principles are the same.

[Anonymous]

Are you referring to the Analysis tools under the Inspect tab? 

[johnsonshiue]

Hi! Please see attached file. It is how I would do it easily. You can certainly create a solid loft using the sketches. But, you will need to manage the multiple profiles in the sketches.

The key here is create the loft in one shot. By creating the loft in one piece avoids the problem at seam. Trimming and mirroring is to guarantee the symmetry. This extra step needs to be performed only when true symmetry is required. Inventor loft does a decent job on recognizing symmetry already.

Let me know if it works for you.

Thanks!

[JDMather]

johnson,

As I indicated earlier - I don't thing the loft is the major concern here.  It is the cut of the loft.

Pull the EOP down to Extrusion10 and examine from the Top view.

To fix this (assuming the design intent is for a nice smooth curve) the Loft will have to be constructed in such a way that after trimming it exhibits this desired curve.  The setup to achieve this is a bit more complex.

[Anonymous]

Thank you for your help.  How was it that the 3D sketches were made?  Did you project the geometry for sketches 1, 2, and 3? 

Thanks!

[Anonymous]

Hi everyone,

I was able to loft using the 3D sketches to make a smooth surface.  Now I am trying to fillet the outside between the 2 main solids.  It allows me to fillet the inside as a continuous loop, but the outside breaks apart into small sections.  Any suggestions? 

[JDMather]

http://forums.autodesk.com/t5/Autodesk-Inventor/Layering-Lofted-Shell/td-p/2715095

Is this a class project? (see link above and attached image)

Which of the two parts are you trying to fillet (it would have been less confusing if you had not included both parts).  Or did you really intend to Combine those into one part?

[Anonymous]

Hello,

Yes, it's a project.  What I have been trying to do is to combine the 2 parts and then fillet the area where they intersect on the outer surface.