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ak-21-Visitor
1-Visitor
May 18, 2015
Question

How to model round corner of a slot with various chamfer length?

  • May 18, 2015
  • 8 replies
  • 5068 views

I am trying to make the model of the attached images. My main problem is the two end round corners. In Solidworks, I lofted cut this with two variable sections and two variable guides, however, apparently in Creo I cannot have multiple sections and multiple trajectories, as I tried to blend top section of the slot with the second below section on an angled plane and it didn't work.

I also tried chamfering with two various variables and used transition point somewhere at the middle of the round end part of the slot, and it didn't work either.

Anyone has an idea how can I do this?


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    8 replies

    D
    DonSenchuk12-Amethyst
    12-Amethyst
    May 18, 2015

    In looking at this, I'm not certain you need multiple trajectories. My first guess would be that a single trajectory with multiple sections should do the trick (Swept Blend).

    T
    TomD.inPDX17-Peridot
    17-Peridot
    May 18, 2015

    It looks like the slot is offset from the chamfer. Maybe make the chamfer to a small slot and then extrude the offset slot.

    I think this is an artifact of the toolmaker where the chamfer was made first (boss) and the slot was added afterward and came out off center.

    M
    mpeterson1-Visitor
    1-Visitor
    May 18, 2015

    Yes you shouldn't need two trajectories and a swept blend should do it. A boundary blend surface is also another avenue with the top and bottom of the race track as your first direction curves and the different slopes between them at each tangency of the ends as your second direction curves should do it too. If I can't create the feature with a simple function I tend to create boundary blends so I have good control of the geometry and I can also create all my curves in individual features ahead of time then just select them as needed in the surface creation. It might be over kill, but works for me.

    M
    mganzer1-Visitor
    1-Visitor
    May 18, 2015

    You could just do the individual chamfers on the two straight edges (you can stop the chamfers at the vertices at the end of the straight lines) and sweep to connect the two on the 180 degree half circles.

    I
    Inoram14-Alexandrite
    14-Alexandrite
    May 18, 2015

    Does this look right?

    cham1.JPGcham2.JPG

      A
      ak-21-VisitorAuthor
      1-Visitor
      May 18, 2015

      It does actually. Is it possible for you to upload the cad model?

      Thanks everyone else, I worked with Solidworks all the time and recently started Creo, that's why I don't have lots of experience. I understand what you say in words, my only problem is when I start trying them, it won't work.

      I
      Inoram14-Alexandrite
      14-Alexandrite
      May 18, 2015

      The model is basically what Antonius described above.

      A
      ak-21-VisitorAuthor
      1-Visitor
      May 19, 2015

      Just wanted to say thanks everyone. I got it done last night.

      Cheers,

        M
        MauroStefanovic1-Visitor
        1-Visitor
        May 20, 2015

        Could you kindly post your solution?

          Patriot_1776
          Patriot_177622-Sapphire II
          22-Sapphire II
          May 20, 2015

          I couldn't open the file because I'm on an older version. There really only needs to be 2 simple features, the slot cut, and the chamfer. I made the trajectory the same size in the X and Z as the dlot, but it doesn't have to be. I realize this is answered, but it was a fun little short diversion.

          OFFSET_CHAMFER-01.jpg

            A
            ak-21-VisitorAuthor
            1-Visitor
            June 22, 2015

            Toby Metcalf and MauroStefanovic,

             

            What Matt Griswold and  Patriot_1776 posted are both right solutions. As I mentioned earlier, Matt's solution solved the problem. It can be done by a slot cut and a chamfer.

             

            Regards,

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