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 .

  2. Select the sewing Volume.

  3. Select the Object to sew onto the volume.

    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. In the Deviation box, choose the deviation tolerance computation mode:

    Option Description
    None No tolerance is considered for the feature computation.
    Automatic The previous deviation value is selected.
    Manual In the Max Deviation text box, you can specify a user-defined tolerance.

    • The result is computed with a default tolerance value which depends on the scale selected in the Design
      Range list in the Design Limits area in Tools > OptionsParameters and Measures:
      Small range: 0.001
      Normal range: 0.1
      Large range: 10
    • The User defined value must be less than the Design range*100.
  5. 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.x.
     
    This element (identified as SewSurface.xxx) is added to the specification tree.

    Without topology simplification

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

  7. 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.