External Feature

The External Feature command adds material to the outside of another material volume that it intersects with in the same body. Shell Properties are not inherited.

This task shows you how to create a external feature.
Open the External_Core.CATPart document.

 

 

  1. Click the External Feature icon .
    External features can have different shapes. The External Feature dialog box is displayed with the Prism icon as the default shape to be created.

    If you prefer a different shape, click any of the four shapes available. To know how to create any of them, refer to the Prism, Sweep, Revolve, Thick Surface or External Shape tasks. For the purposes of our scenario, keep the default option.

  2. Select Sketch.2 as the profile you wish to extrude. If no profile is defined, clicking the Sketcher icon enables you to sketch the profile you need.

  3. In the Limits tab, enter these values:

    First length=102mm

    Second length=-6mm

  4. Optionally, set the parameters and options you wish to make the shape more complex as explained in Prism (or Sweep) page.

  5. Click OK to confirm and create the External feature. External Prism.X is added to the specification tree in the Solid Functional Set.X node.

More about Intersection Fillet

For the shape selected in the Shape definition area, you can apply an intersection fillet by selecting Intersection with Cavity option from the Intersection Fillet list available in Fillet tab.

In this case following three options are available:

  • The Fillet radius option enables you to add material to the feature.
  • The Round radius option enables you to remove material from the feature.
  • The Preserve Thickness option enables you to keep the thickness applied on the part.