Creating a Sew Surface

Sewing is a Boolean operation combining a surface with a volume. This task shows you how to add or remove material by modifying the surface of the volume.
Open the VolumeSew1.CATPart document.
  1. Click Sew Surface .

    The Sew Surface Definition dialog box is displayed.
  2. Select the sewing Volume (here Add.1).

  3. Select the Object to sew onto the volume (here Join.1).

    With topology simplification

    Keep Simplify geometry active. Using this option, if in the resulting volume there are connected faces defined on the same geometric support (faces separated by smooth edges), these faces will be merged into one single face.
    Arrows appear indicating the side where material will be added or kept. Note that clicking an arrow reverses the given direction.
    The arrows must point towards the volume.
  4. Click OK.

    The surface is sewn onto the volume. You may notice that the bottom of the volume is made of one single face.
    To see the simplification, just hide Join.1.
    This element (identified as is added to the specification tree.

    Without topology simplification

  5. Double-click SewSurface.1 in the specification tree to edit it and deselect Simplify geometry.

  6. Click OK.

    The bottom of the volume is made of three connected faces. The smooth edges resulting from the sewing appear because no topological simplification has been performed.
    For more information about the Intersect body option, refer to Sewing Surfaces in Part Design User's Guide.