Creating a bird mouth bend using the SOLIDWORKS flex command

Using the Flex Command in SOLIDWORKS allows the creation of Flex features, to deform complex models in an intuitive manner.

You can create four types of flexes:

To create Flex features, click Flex (Features toolbar) or Insert > Features > Flex, set the PropertyManager options, and click .

General Information on Flex Features

The flex feature calculates the extents of the part using a bounding box. The trim planes are then initially located at the extents of the bodies, perpendicular to the blue Z-axis of the triad .
The flex feature affects the region between the trim planes only.
The centre of the flex feature occurs around the centre of the triad location.
To manipulate the extent and location of the flex feature, re-position the triad and trim planes. To reset all PropertyManager values to the state they were in upon opening the flex feature, right-click in the graphics area and select Reset flex.

The video below gives an example of how the Flew command can be used to create a bird mouth bend, in a piece of box section.