Unfold/Fold
With the Unfold and Fold tools, you can flatten and bend one, more than one, or all of the bends in a sheet metal part.
This combination is useful when adding a cut across a bend. First, add an Unfold feature to flatten the bend. Next, add your cut. Lastly, add a Fold feature to return the bend to its folded state.
For faster system performance, unfold and fold only the bends that you need for the task that you are performing.
To add an Unfold feature:
-
In a sheet metal part, click Unfold 
on the Sheet Metal toolbar, or click Insert, Sheet Metal, Unfold.
-
In the graphics area, select a face that does not move as a result of the feature for Fixed face 
.
-
Select one or more bends as the Bends to unfold 
, or click Collect All Bends to select all the appropriate bends in the part.
-
Click OK 
.
The selected bends unfold.
To add a Fold feature:
-
In a sheet metal part, click Fold 
on the Sheet Metal toolbar, or click Insert, Sheet Metal, Fold.
-
In the graphics area, select a face that does not move as a result of the feature for Fixed face .
-
Select one or more bends as the Bends to fold 
, or click Collect All Bends to select all the appropriate bends in the part.
-
Click OK .
The selected bends fold.