Creating Walls from an Edge

Open the NEWWall1.CATPart document from the samples directory.

1. Click Wall On Edge in the Walls toolbar and select an edge of the wall.

   The Wall On Edge Definition dialog box is displayed together with a preview of the wall.
   	The preview gives information about: the Profile: by default, if you pick an edge on the top of the reference wall, the direction of the wall is upwards and if you pick an edge on the bottom of the reference wall the direction of the wall is downwards.  You can invert the sketch's position, and therefore the wall's, using the Reverse Position button. the material side: by default the material side is proposed so as to keep a continuity with the reference profile. However, you can change it by clicking the red arrow or the Invert Material Side button: in such a case, there is no continuity between the material side and the reference profile anymore. the Bend extremities

2. Specify the following references:

   the Length type of the wall you want to define Select: the icon to define the height of the wall from the bottom of the reference wall, the icon to define the height of the wall from the top of the reference wall, the icon to define the height of the wall from the top of the bend, the icon to define the height of the wall from the intersection between the bottom of the reference wall and the bottom of the wall on edge.

   the Length of the wall: that is the absolute value of the wall on edge without bend.

   You can also define the height limit of the wall on edge with a plane or a surface by selecting Up To Plane/Surface in the Height box. If you need to create a plane, right-click the limit field. Click Limit position to define whether the height limits are to be defined on interior or on exterior of the wall on edge. When the Height limit is selected, the offset value is the height of the wall from the top of the bend (Third length type). On interior   On exterior You can also define these parameters with a right-click on the annotations.

3. Define the width of the wall by entering right and left offsets.

   	You can also define the width limits of the wall on edge with planes or surfaces. If you need to create a plane, right-click the Left limit or Right limit fields.
   	Click Limit position to define whether the width limits are to be defined on interior or on exterior of the wall on edge.
   	In Automatic mode, you can swap the left limit with the right limit using Swap limits .

4. Define the angle of the wall: by default it is perpendicular to the plane containing the edge. You may modify it according to your needs. It is dynamically updated on the screen.

   	You can also design a wall on edge using a predefined support by selecting Orientation plane. If you need to create a plane, right-click the Default support field.   Angle and clearance values become relative to the selected plane.
   	You can define tangent walls (angle value = 180°).

5. Select a Clearance mode to offset the wall on edge from the selected edge according to your needs and enter a Clearance value.

   	The No Clearance mode allows you to define a wall on edge without clearance. The Monodirectional mode allows you to move the wall in one direction. The Bidirectional mode allows you to move the wall in two directions.
   	A warning is displayed if you choose Bidirectional mode. Indeed, this clearance mode implies a relation created through the formula, between the wall position and the sheet metal parameters bend value. Consequently, after designing your part, the wall position will change if you modify the sheet metal parameters bend value.

6. Choose to create the wall with or without a bend by checking the With Bend option.

   	You can edit the bend properties by clicking Bend parameters or by right-clicking the extremities annotations.

   	If there is no wall from which a limit can be computed, the reference element is the edge of the reference wall.
   	A wall on edge is defined by the selected edge (reference edge). When the reference edge is modified, by adding any feature that shortens the edge (a bend to an adjacent wall on edge or a cutout for example) the wall on edge based on this reference edge is recomputed.
   	To avoid this you may:  create the bend manually on the wall modifying the edge used as the reference to  create the other wall reorder the creation of walls to postpone the creation of the modifying feature
   	Both limits are computed with the same reference icon.
   	The bend is not previewed, even if the option With Bend is checked. However it will be created.
   	The selected options are modal and will be proposed to create the next wall.
   	Walls on edge being contextual features, if you break the profiles continuity by inverting the material side of a wall, you may have to manually re-specify all features based upon the modified one, even if they are not directly connected to the modified wall, in order to update the part afterwards.
   	This is the case when creating a wall on edge from another wall on edge, for example:
   	If you invert the material side of the reference wall on which the first wall on edge has been created, both walls on edge are relocated (as if you were flipping the geometry): If you invert the material side of the first wall on edge (and not the material side of the reference wall), the second wall on edge is relocated. Indeed, its specification being relative to the first wall on edge, when its input data (i.e. the edge selected on the first wall on edge) is modified, the second wall on edge is rebuilt at a new location.

7. If necessary, modify the support geometry by extrapolating it. This extrapolation is automatically computed.

   There are two kinds of extrapolation : : extrapolation based on the geometry of the wall on edge support. : extrapolation based on the geometry of the wall on edge.

8. Click OK in the Wall On Edge Definition dialog box.

   A WallOnEdge.xxx element is created in the specification tree.
   	A WallOnEdge.x element can be edited: double-click it in the graphic area or in the specification tree to display its creation dialog box and modify the parameters described above, including the edge from which it is created. However, the sketch of a wall on edge cannot be edited directly. You can cut or copy and paste a wall on edge.
   	If you cut and paste a wall on edge with children elements, these children elements are lost. This may result in update errors. You cannot undo an Isolate action after having modified the wall. Isolating a wall on edge erases all updating data.

Selecting the Multiple Edges

In the Automatic mode, you can manually select several edges to create walls in a single operation.

The Extremities tab of the Wall On Edge Definition dialog box is updated as shown below:

The selected edges should be linear and in the same loop of a support shell. You can specify only numerical values for height, orientation angle and extremities (Left offset and Right offset). Left and right bend extremities must be same for the walls created on the edges. The properties of the bends and the walls are same for all walls created on the edges. Reselect the edge again to deselect it.

Gap at the Intersection Corner of the Walls

You can keep a gap between the intersecting walls created on the edges at their intersection corner. You need to specify the value in the Gap Value field.

This functionality is not applicable for the multiple walls created on the edges with extrapolation.

Auto Selection

If one or more edges of the different supports are selected, then you can automatically select the rest of the edges belonging to these support faces. In this case, right-click the No Clearance annotation from the geometry and select Auto Selection.

Auto Selection on Multiple Supports	Wall Creation on the Rest of Edges of the Supports

To cancel the edge selection, right-click the No Clearance annotation from the geometry and select Clear Selection.

Auto Relimit

In case of the overlapping or intersection of the walls created on the multiple edges, the walls and bends are automatically relimited to have a better result.

Explode

The Explode functionality is available only when multiple edges are selected. You need to right-click Wall On Edge with Bend.X in the specification tree and select Wall On Edge with Bend.X object > Explode... 

• The multiple walls created on the edges without extrapolation are replaced by the sketch based walls on edges. The individual sketch based wall on edge is created for each selected edge.
• The multiple walls created on the edges with extrapolation are replaced by the tangent walls and sketch based walls on edges. The tangent walls are created from the relimited extrapolated supports. The sketch based wall on edges are created on the new edges generated from the tangent walls.

The sketches created for the sketch based wall on edges and the tangent walls can be under-constrained. In this case, a warning message is displayed.

Creating a Wall on Edge from a Sketch

Open the NEWWall1.CATPart document from the samples directory.

1. Click Wall On Edge and select Sketch based in the Type field.

2. Select an edge of the wall and click Sketcher next to the Profile field.

3. Select a plane and click Profile .

4. Sketch the profile.

   	When an extrapolation is necessary during the cretion of a sketch based, the wall profile must intersect the plane represented by the selected edge and the top or bottom face. When the extrapolated mode is active, the cutting edges of bend extremities can only impact the extrapolated wall. The sketch based wall profile must only create one face.

5. Click Exit workbench to return to the 3D world.

   The wall on edge is previewed.

6. Click OK.

Creating a Wall on Edge of a Flange or a Stamp

1. Click Wall on Edge and select the edge of the user flange.

2. Click OK in the Wall On Edge Definition dialog box to create the wall on edge on the user flange.