Creating Edge Fillets


Edge fillets are useful to provide a transitional surface along a sharp internal edge of a surface.

This task shows how to create a constant radius fillet along the internal edge of a joined surface.
The fillet surface is obtained by rolling a sphere over the selected edge.

Open the EdgeFillet1.CATPart document.
  1. Click Edge Fillet .

  2. Select the edge to be filleted.
    You can also select a face, provided there is no ambiguity as to the edge(s) to be filleted.

  3. The Edge Fillet Definition dialog box appears.

  4. Select the desired type of extremity for the fillet from the list:

    • Straight: no tangency constraint is imposed at the connecting point between the fillet
      and the initial support, generating sometimes a sharp angle.
    • Smooth: a tangency constraint is imposed  at the connection between the fillet surface
      and the support surfaces, thus smoothing the connection
    • Maximum: the fillet surface is limited by the longest selected edge
    • Minimum: the fillet surface is limited by the shortest selected edge
  1. Type the value of the fillet Radius.
    A preview of the fillet appears.

  2. You can choose the Propagation type:

    • Tangency: the fillet is propagated up to the first edge that is not continuous in tangency.

    • Minimal: the fillet is propagated up to the first geometric limitation.

Click More >> to access further check boxes: Edge(s) to keep and Limiting element and Blend corner.
  1. Click OK to create the fillet surface.
    The surface (identified as is added to the specification tree.

  • Select the Trim support elements check box to relimit the support elements and assemble them to the fillet.