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How to create a part of "third ring piston" in NX?

By Erika Rose on 02 Apr 14:24 2 answers 762 views 3 comments

I would like create teh third ring for a piston, but the "yellow" piece I couldn't create... I was trying "Law Curve" command, but I don't know the mathematical expression to use. Is it possible in another way? Or someone could show me the correct expression?

Thank you

Added images

Square

2 answers

  • Samu Suojanen
    Samu Suojanen over 2 years ago

    Hi Erika!

    I would sketch part of the shape and then pattern the rest of it as needed.
    Then model a cylinder and use Wrap command to wrap the sketch around the cylinder. Then you can use Law Extension to extrude the wrapped sketch according to the cylinder face. Finally thicken the surface and apply necessary blends or chamfers.

    Example made in NX10.

    Answered with a tutorial: https://grabcad.com/tutorials/how-to-create-a-part-of-third-ring-piston-in-nx

    Attachments

    oil_ring_step.stp, 2.92 MB
    Download
    oil_ring.prt, 2.2 MB
    Download
  • a27053b4
    a27053b4 over 2 years ago

    Attached is a method using law curves to generate a sinusoidal shape.

    Attachments

    oil_ring_1.prt, 764 KB
    Download

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