Folding and Unfolding Bends

In our example, we chose local fold and unfold of bends.

Unfolding

1. Click Unfolding  . The Unfolding Definition dialog box is displayed.

   The following options are available: Reference face: fixed part of the body. Unfold Faces: bend(s) to unfold. Angle: corresponds to the angle of the selected face to unfold. By default, it is disabled. Angle type: Natural: when selected, the angle is set to the initial bend value by default (90 degrees in our example) and is disabled.  Defined: allows you to choose the bend angle with the up and down arrows.  Spring back: the angle of the bend is based on the natural angle with additional degrees.

2. Select Wall.1 as reference face in the geometry area.

3. Select the cylindrical bends you want to unfold on the geometry.
   A red arrow is displayed indicating the direction of the angle.

   Click the Select all option if you want to unfold all the bending faces of the part.

4. Select an Angle type in the list:

   If you select Defined or Spring back, then the Radius type icon appears.

   Normal: default unfolding option for the bend. Fix: the bending radius is the same and the position of the bending axis is fix. Move:the bending radius is the same but the position of the bending axis moves.

5. Click Preview to visualize the unfolding of the bends you selected.

6. Click OK to unfold the bends.
   The Unfolding.xxx feature is created in the specification tree.

   You can unfold non canonical faces such as a curved flange.

Folding

1. Click Folding  . The Folding Definition dialog box is displayed.

   The following options are available: Reference face: fixed part of the body. Fold faces: bend(s) to fold. Angle: corresponds to the angle of the selected face to fold. By default, it is disabled Angle type: Natural: when selected, the angle is set to the initial bend value by default (90 degrees in our example) and is disabled. Defined: allows you to choose the bend angle with the up and down arrows. Spring back: the angle of the bend is based on the natural angle with additional degrees.

2. Select Wall.3 as reference face on the geometry.

3. Select Cylindrical Bend.1 on the geometry.

   A red arrow is displayed indicating the direction of the angle.
   	Click the Select all option if you want to unfold all the bending faces of the part.

4. Select an Angle type in the list:

   If you select Defined or Spring back, then the Radius type icon appears.

   Normal: default unfolding option for the bend. Fix: the bending radius is the same and the position of the bending axis is fix. Move: the bending radius is the same but the position of the bending axis moves. In this example, the Angle Type is set to Defined, the Angle value is set to 45 degrees and the Radius Type is Normal.

   Select Defined as angle type and 45 degrees as angle.

5. Click Preview to visualize the folding of the bend you selected.

6. Click OK to fold the selected bend.

   The Folding.1 feature is created in the specification tree.
   Bend folded with a Spring back angle at 90 degrees
   Bend folded with a natural angle at 90 degrees
   	To fold or unfold a part with a bending cycle, each element of the cylindrical bend has to be selected individually.
   	Multiselection is possible but since unfold faces must be in the same domain you must fold/unfold the parts one after the other. You cannot create folded faces with null radius. The fold/unfold feature is only available in folded view. Flattened view will be modified only in case of Folding/Unfolding with the Fix or Move Radius type options. Spring back is applicable to folded result only irrespective of Unfolding or Folding command.
   	You cannot fold/unfold bends: if faces to fold are not in the same domain, if cylindrical faces are generated from stamps or rolled walls. You cannot fold back an unfolded bend if its radius is null.
   	In hybrid context, even though a wall is created with one or several features, none are aggregated under the wall in the specification tree.
   	Specification tree's behavior in pre-hybrid context      Specification tree's behavior in hybrid context Yet, if you open a part created in a previous release, the specification tree will be displayed accordingly to the previous behavior. For more information about Hybrid Design, refer to the Hybrid Design section.   It is possible to fold/unfold a part with a stamp located on or inside a bend. To do so, select the bend.