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davehaigh13-Aquamarine
13-Aquamarine
December 9, 2009
Question

model a rectangular to round transition

  • December 9, 2009
  • 5 replies
  • 1810 views
I thought I could model a transition with a straight blend. It's complaining about having unequal number of segments in the two sketches. ?????

David Haigh
Phone: 925-424-3931
Fax: 925-423-7496
Lawrence Livermore National Lab
7000 East Ave, L-362
Livermore, CA 94550

    5 replies

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    davehaigh13-AquamarineAuthor
    13-Aquamarine
    December 9, 2009
    Thanks, I can now get a transition, but it's not correct.

    A sheet metal transition has 4 triangular flat sides with triangular folds in between to conform to the circle. I don't need to show all the folds, but I do want the edges hi-lited in red on the attached image.

    David Haigh
    Phone: 925-424-3931
    Fax: 925-423-7496
    Lawrence Livermore National Lab
    7000 East Ave, L-362
    Livermore, CA 94550

    D
    DiVenti1-Visitor
    1-Visitor
    December 10, 2009
    Yes. This is one of the constrains of this feature.
    The blend needs to have sections comprised of the same number of segments.
    So, if you have a circle and a square for example. You "divide" the circle
    in 4 segments to have the same number of segments as the square.
    It is also important the starting point. (RMC "Start Point"), if not
    chosen right the blend is twisted.
    You can divide a sketched feature with "Divide an entity at the point of
    selection"
    See snapshot, hope it goes thru.
    Hope it helps.


    L
    lwh1-Visitor
    1-Visitor
    December 10, 2009

    That is not quite how the resulting surface looks like - it does not have these edges, but smooth transitions.

    To get something like that, You have to use

    - either true surfaces and create the solid from those

    - or add very small radii to the rectangle corners and split the circle into 8 arcs of different lengths.

    B
    BobFrindt1-Visitor
    1-Visitor
    December 10, 2009
    If you are blinding a circle to a square the circle needs to be split into
    four arcs. The shape will be blended from the vertices of the square to
    the vertices on the circle. I would recommend that you experiment with
    this to see how this effects your blend by changing the included angle of
    the arc segments, and toy with the other blend options to see how this
    feature works.

    Bob Frindt
    Sr. Designer
    Parker Hannifin Corporation
    Parker Aerospace
    Gas Turbine Fuel Systems Division
    9200 Tyler Boulevard
    Mentor, OH 44060 USA
    direct (440) 954-8159
    R
    rrich1-Visitor
    1-Visitor
    December 10, 2009
    It looks like you have lots of help on how to create it, but here is the
    link to how sheet metal people will want it created. If you plan to have
    this be a true sheet metal part I would suggest you create it in
    pro/sheetmetal and make sure it will flatten for you so you can send it out
    to a vendor with confidence.



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