More About Tritangent Fillets

There are a few things you need to know when migrating a tritangent fillet into CATIA V6 using the CATIA_SPEC option.

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Tritangent Fillets

When migrating CATIA V4 tritangent fillets, resulting tritangent fillet shapes may slightly differ in CATIA V6. This is due to the use of different geometrical definitions.

  • In V4, a tritangent fillet is based on two variable spheres.
  • In V6, a tritangent fillet is based only on a variable tritangent circle.

This slight difference of shapes can be increased if the faces to be filleted are not normal to the face that will be removed during the filleting process. The example below illustrates it thru a solid including an important draft angle. However, despite the difference with a tritangent fillet that would be created directly in V6, the whole volume remains the same.