A fillet is a type of blend surface, but it requires that the two surfaces actually intersect. They also have the restriction that they can only blend two surfaces. A blend surface is a more general blend of 2, 3 or 4 surfaces. This surface constructor requires that you be familiar with creating curves on a surface and tangency, but it creates complex blends if these concepts are mastered by the user.
2 Surface Blends
This figure shows a two surface example. For this blend you must supply the curve on each surface to create this surface.
3 Surface Blends
This figure shows a three surface blend example. This blend is used to create what is known as a “suit case fillet.” This means that you want to create the intersection of three fillets like the corner of a suit case. If you create the fillets with FeatureMILL3D, the curves can usually be automatically detected.
4 Surface Blends
This figure shows a four surface blend. It is another suit case fillet. In this case one surface is not a fillet.
The curve for this surface must be specified. Four surface blends can also be used to join four distinct surface as in this figure .
