A fillet is a curved face of a constant or
variable radius that is tangent to, and that
joins, two surfaces. Together, these three surfaces form either an inside
corner or an outside
corner.
In drafting terminology, the curved surface of an outside corner is generally called a round and that of an inside corner is normally referred to as a fillet. Edge fillets are smooth transitional surfaces between two adjacent faces. The purpose of this task is to fillet several edges. First you will fillet nine edges, then you will fillet a face and trim this fillet to a plane. The cases illustrated here are simple. They use a constant radius: the same radius value is applied to the entire edges. To see more complex fillets, refer to Creating Variable Radius Fillets or Variable Radius Fillet Using a Spine. This document deals with the following:
|
||||||||
Open the Edge_Fillet1.CATPart document. | ||||||||
|
||||||||
The icon now available after the Objects to fillet field lets you edit the list of the faces to be filleted. For more information about that capability, refer to Editing a List of Elements. |
||||||||
|
||||||||
Clicking Preview previews the fillet to be created. | ||||||||
|
||||||||
To know how to use:
|
||||||||
Limiting Elements |
||||||||
|
||||||||
|
||||||||
|
||||||||
Interrupting Fillet ComputationsIn case you made a mistake when
defining a fillet (wrong radius value for example), you can interrupt the
feature computation launched after clicking OK, when the
computation requires a few seconds to perform. This new capability is available for any types of fillet features you are creating or editing. |
||||||||
Keeping EdgesWhen filleting an edge, depending on the radius value you specified the fillet may affect other edges of the part that you do not want to fillet. In case you can anticipate such a result, before confirming the Fillet operation, specify the edges you want to exclude from the operation by filling in the Edges to keep field. In the example below, the user selects the upper edge as the edge to keep. Once selected, this edge turns purple.
|
||||||||
Note: Selecting
an edge as an edge to be kept can propagate the selection of edges to be
filleted. Propagated edges are displayed in red dotted lines. In the example below, both purple edges are selected as edges to be kept. The selection of the edge to be filleted (in red) then includes two additional edges
If an Error Message is Issued...In case you have specified no edges you want to exclude from the fillet operation, the application may sometimes detect that some edges cause trouble during the fillet computation. The application then issues an error message asking you if you wish to select the edges you do not want to fillet. There are two ways of specifying the edges you want to keep:
Both methods may not give the same result depending on the geometry. If you prefer to let the application find a solution, the application finds an appropriate physical edge in the geometry, then considers it as the edge to be kept. If no edge can be found, then it finds a solution by itself. |
||||||||
Ignoring EdgesWhen the update process detects that sharp edges (edges are considered as sharp when the angle between the two faces is greater than 0.5 deg) interrupt fillet operations, it is possible to continue filleting just by selecting an edge adjacent to the edge to be filleted. In the example below, the application displays the edge causing trouble in yellow: |
||||||||
An error message is issued, prompting you to select an edge adjacent to the filleted edge. Just by selecting both edges to the right and the left of the previewed fillet, the application can then compute the whole fillet properly: | ||||||||
Trimming RibbonsIf you choose to use the Tangency propagation mode, you can also trim overlapping fillets. To do so, simply check the "Trim ribbons" option. Selected edges |
||||||||
Overlapping fillets are not trimmed |
||||||||
Both fillets are trimmed
|
||||||||
Compare the above results to the fillets created with the Minimal propagation mode: The fillets are only trimmed. |