Creating Face-Face Fillets

You can create a basic face-face fillet by two faces.

1. Click Face-Face Fillet .

   The Face-Face Fillet Definition dialog box appears.

2. Select the two Faces to fillet.

   
   
   

3. Select the Extremities type, that is the relimitation mode.

   
   
   
   

   • 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

   (Refer to Creating Bitangent Shape Fillets)

4. Enter a radius value in the Radiusfield if you are not satisfied with the default one. This value must be greater than 0.

5. Select the Conic parameter check box. This check box allows you to vary the section of the fillet.

   Important: For a parameter comprised between or equal to: 0.5: the resulting curve is a parabola 0 and 0.5: the resulting curve is an arc of an ellipse 0.5 and 1: the resulting curve is a hyperbola.

6. Click Preview.

   
   
   

7. You can check Trim support elementsto relimit the support elements and assemble them to the fillet.

8. Click OK.

   The faces are filleted. This fillet is indicated in the specification tree.
   
   

   Warning: Note that the selection of the feature prevails over the selection of the sub-element. To select a sub-element, you need to apply the ''Geometrical Element'' filter in the User Selection Filter toolbar. For further information, refer to Selecting Using a Filter in CATIA Infrastructure User's Guide.

While creating the fillet, you can limit it by selecting an element that intersects it completely in the Limiting element field prior to selecting the trimming element.

1. Select the edge to be filleted and key in the radius.

2. Click Preview then More>>.

3. In the Limiting element(s) field, select the either a plane or a surface.

   
   
   

   For further details, refer to the Limit Fillets section in Creating Edge Fillets.

Instead of entering a radius value, you can use a "hold curve" to compute the fillet. Depending on the curve shape, the fillet radius value is then more or less variable.

Warning: If the Conic parameter check box is selected, the Hold Curve and Spine fields are grayed out. Conversely, if the Hold Curve or Spine field is selected, the Conic parameter check box is disabled.

1. Select the two Faces to fillet as shown below and click More>>.

   
   
   

2. Select the Hold Curve.

   
   
   

   The curve must be sketched on one of the selected faces.

3. Select the Spine, for instance you can select a sketch.

   The spine provides a better control of the fillet.

   The spine can be a wireframe element or a sketcher element.

   To compute the fillet, the application uses circles contained in planes normal to the spine. It is then possible to control the shape of the fillet.

   
   
   

4. Preview the fillet:

   
   
   

5. Repeat the operation and select Sketch.3 as the spine:

   
   
   

6. Click OK to create the fillet.

   
   
   For more information, refer to Part Design User's Guide.

You can create a face-face fillet to volumes.

1. Click Face-Face Fillet .

   The Face-Face Fillet Definition dialog box appears.

2. Select the two Faces to fillet.

3. Set the Radius to 10mm.

4. Click Preview.

   
   
   

5. Click OK to create the fillet volume.

   
   
   

   Warning: Extremities and Trim supportare grayed out, they cannot be used with volumes.