When exporting a dxf flat pattern in fusion 360 sheet metal an error occurs.
Fusion 360 sheet metal flat pattern.
How to make flat patterns for rolled sheet metal designs.
To do that create the sheet metal part from scratch in fusion 360.
An example of the procedure for a sat file is presented in the screencast below.
Only flat linear sections of sheet metal can be used as the stationary base face for a flat pattern.
Select the stationary face.
Re assignment of the sheet metal rules for the resulting component will not be possible.
Create a small flat tab somewhere on your design that can be cut off during manufacturing and use that as the stationary face for the flat pattern.
Sheet metal bodies with multiple radii curves or arcs in the sketch.
Link to vote for improved sheet metal tools in fusion.