Creating Chordal Fillets

You can create a chordal fillet by controlling the fillet's width (distance between the two rolling edges). The application lets you define two types of variations:

  • Cubic
  • Linear

Related Topics
More about Chordal Fillets

  1. Click Chordal Fillet in the Dress-Up Features toolbar (Fillets sub-toolbar).

    The Chordal Fillet Definition dialog box appears.



    The default options let you define a cubic variation of the chordal fillet.

    Important:
    • In Functional Modeling Part workbench, click Chordal Fillet in the Dressup & Modifiers toolbar (Part Design Fillets sub-toolbar) for creating part design chordal fillet.
    • In Functional Modeling Part workbench, click Chordal Fillet, local modifier in the Dressup & Modifiers toolbar (Functional Fillets sub-toolbar) for creating functional chordal fillet.
    • In Generative Shape Design workbench, click Chordal Fillet in the Operations toolbar (Fillets sub-toolbar)..

  2. Select the edge you want to fillet. You can select closed edges.

    The application detects both vertices and displays two identical chordal lengths, 5mm in our example.

  3. Double-click on one chordal length value in the geometry area to access the Parameter Definition dialog box. For example, enter 50mm and click OK.

  4. Click the icon at the right of the Points box to define a fillet with variable width at the intermediate points you specify.

  5. Select a point and set 30 as its radius value.



  6. Select one of the two planes cutting the edge.

  7. Double-click the chordal length at the plane. For example, enter 20mm.



  8. Select OK.



    You can select the Conic parameter check box options which allow you to vary the section of the fillet. For a parameter comprised between or equal to:


    • 0.5, the resulting curve is a parabola.
    • 0 < parameter < 0.5, the resulting curve is an arc of an ellipse.
    • 0.5 < parameter < 1, the resulting curve is a hyperbola.

    Conical fillets do not handle twist configurations. If a twist is detected, the fillet operation fails.

    If the fillet surface curvature is lower than the support curvature, fillet surface relimitation may fail. In such cases, the conic parameter has to be decreased.

  9. To edit this fillet, double-click the fillet in the specification tree. Click More to access the Limiting elements option.

  10. Click , then select the place you want to use as the trimming element in the geometry.

  11. If needed, click the arrow to reverse the direction and therefore specify the portion of material that will be kept.



  12. Click OK.

    The variable radius fillet is trimmed to the point you have selected. The final fillet looks like this: