Filling a Transition Gap Between Parts

[hooshsim]

I'm looking for a guidance on how to fill a gap between two parts using the generated curves as boundaries...model file is attached.
Please note that all the curves are tangent to the the parts edges and they should remain untouched.
Thanks in advance. Hooshsim

[microelly2]

the simplest way is to create Part filledfaces from the border curves.

More powerfull:
you can create BSplineSurfaces from the Faces which schoud be connected and BSplines Curves from the rails.
Then use the data to crea a BSpline Surface for the gap.

[hooshsim]

Thanks Microelly2.

How would you create Part filledfaces from the border curves or BSplineSurfaces from the Faces? Would you do it in Part WB or else? An updated file with the built surfaces will be appreciated.

Hooshsim

[Vincent B]

These edges are inconsistent and might give some troubles...
And some blend curves are not really tangent...
Can you change something or not?

[hooshsim]

GluoGluo,

Thanks for the reply. Feel free to modify the curves if you wish but, we need to keep them in close approximations to the existing ones in order to maintain the overall transition shape. Any other method to fill the gap is also acceptable.

Because of the cyclic symmetry in the geometry we could approach this problem differently as shown in the slide...see attached new model file. This method is mostly preferred. Much appreciated.

Hooshsim

[Vincent B]

Strange shapes your design!
So, I slightly modified the sketch to not have blend curves crossing them self.
The workflow is as that:
Make faces using ruled surface (carry out nice surfaces), or if you have a lot of edges you must to use the filling feature (select second degree to get stretched surface). Gordon surface can be a good choice as well if you have 4 edges.
After you have the whole surfaces, select all and call "parametric solid" in Curve WB (a green cube), you will get the solid.
You can test it by making a cut with a primitive shape.

[hooshsim]

GlouGlou,
I see what you have done to the model but that is a violation of cyclic symmetry. Compare the attached slides. You should not see any discontinuity in the model if you do 360 deeg. 11 polar array.

[Vincent B]

OK, i didn't understand the purpose of your start parts.
I've tried to build the transition surface by using a "bridge" (red) to give some thickness, otherwise the surfaces are too twisted.
you can move the sketch to adjust the shape.
Check out my file.
But the twist between two blades is too high I think, that's give some ugly seamless.

[hooshsim]

This is great but there is issues with the part. Right click on the Array or Fusion (one segment) and check for the geometry. How would you heal the edges and/or surfaces?

[hooshsim]

GlouGlou,
Could you briefly explain how you created Gordon and Facebinders? Where are the options located? I'm not too familiar with al features of FreeCAD.