Creating Corners

This task shows you how to create a corner between two curves or between a point and a curve.

Open the Corner1.CATPart document.
 

Corner On Support

  1. Click Corner .

    The Corner Definition dialog box opens.

  2. Select Corner On Support from the Corner Type drop-down list.

  3. Select a curve or a point as first reference element.

  4. Select a curve as second reference element.

    The corner will be created between these two references.

  5. Select the Support surface. 

    The support can be a surface or a plane.
    Here we selected the zx plane.
    The resulting corner is a curve seen as an arc of circle lying on a support place or surface.
    The reference elements must totally or partially lie on this support, as well as the center of the circle defining the corner. Moreover, the laid elements must be connex.

  6. Enter a Radius value.

    In the case of a curve as Element 1, note that:

    • all corners have the same radius

    • closed wires can be selected

  7. Click OK to create the corner.

    The corner (identified as Corner.xxx) is added to the specification tree.

3D Corner
 

  1. Click Corner .

    The Corner Definition dialog box opens.

  2. Select 3D Corner from the Corner Type drop-down list.

  3. Select a 3D curve or a point as first reference element.

  4. Select a 3D curve as second reference element.

    The corner will be created between these two references.

  5. Select an optional Direction.

    • If you select a direction, the corner will be computed according to this direction. You can clear the selection by selecting the Clear Selection contextual item.

    • If you do not select a direction, the optimal direction is computed.

    • If no direction is specified or if you select a direction from the contextual menu (Edit Components, X, Y, or Z Axis), a red arrow is displayed in the 3D geometry representing the direction.
    The resulting corner is a 3D curve seen as an arc of circle along the input Direction.
    The input elements must not be collinear to the 3D Corner direction. Moreover, if the plane projection of an input element along the user input direction is singular or is self intersected, some corner solution might not be computed.

  6. Enter a Radius value.

    In the case of a curve as Element 1, note that:

    • all corners have the same radius

    • closed wires can be selected

  7. Click OK to create the corner.

    The corner (identified as Corner.xxx) is added to the specification tree.
 

Creating a Corner on a Vertex
  Checking Corner On Vertex enables you to create a corner by selecting a point or a curve as Element 1 (Element 2 is grayed out).
  The following example shows a corner defined by a point as Element 1:
 
   
  The following example shows a corner defined by a curve as Element 1:
 
Selecting a curve is only available with the Generative Shape Design product.
 

Trimming Elements
  You can select the Trim element check buttons if you want to trim and assemble the two reference elements to the corner.
Elements can be trimmed and assembled individually.
   
 
Several solutions may be possible, so click Next Solution to move to another corner solution, or directly select the corner you want in the geometry.

Not all four solutions are always available, depending on the support configuration (if the center of one of the corners does not lie on the support for example).

  • When the selected curves are coplanar, the default support is the background plane. However, you can explicitly select any support.

  • When the selected curves are not coplanar, an implicit plane can be created, provided the curves intersect and are locally coplanar at this intersection. However, you can explicitly select any support.

  • You can edit the corner's parameters. Refer to Editing Parameters to find out how to display these parameters in the 3D geometry.