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edi1-Visitor
1-Visitor
September 19, 2017
Question

Swept blend through projected sketches

  • September 19, 2017
  • 8 replies
  • 8621 views

Hi,

I'm trying to do a swept blend through 5 sketches, 2 of these sketches are projected on surfaces. The swept blend doesn't work when these 2 sketches are selected. When not selected  it works fine. How can I solve this problem? I have attached a .prt file. The sketches are vane1_sketch_projection, vane2_sketch,vane3_sketch,vane4_sketch and vane5_sketch_projection. Thanks

8 replies

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psobejko1-Visitor
1-Visitor
September 19, 2017

I can't open Creo 4 files, so I don't know if your vane1_sketch_projection and vane5_sketch_projection are actually not sketches but projections of sketches onto a non-planar surface?

 

If so, then I think the problem might be that you cannot use non-planar sections for the swept-blend modeling feature.  I don't know this for sure - the system allowed me to use non-planar closed curve as a "selected section", but then the swept blend feature failed.  When I redefined this curve to be from a projection onto a flat surface, the feature worked.

 

Further references: PTC Creo Parametric Help - swept blend

 

Suggestions:

1) generate planar projections of the vane1_sketch_projection and vane5_sketch_projection onto appropriate datum planes

2) use surface modeling tools such as styles, boundary blends and fills; merge the surfaces into a quilt that encloses a volume and solidify it.

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edi1-VisitorAuthor
1-Visitor
September 20, 2017

Hi

I solved the problem. I deleted the projected profiles and instead used the swept blend with two additional profiles to go beyond the curved walls. After that I used extrude cut to remove the excess segments of the wings.

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edi1-VisitorAuthor
1-Visitor
September 20, 2017

I just have one last issue to solve which is very surprising to me actually. I have attached a sketch file to this post. I'm trying to draw a trailing edge circle such that it's center resides on the camber line  with the circle passing through the last point of the camber line.  I tried to use the coincident constraint between the center of circle and the camberline but it didn't work. Also, upper and lower curves should be connected with an arc to close the sketch. I wasn't successfull with this either. Any help is appreciated.

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