Join our CAD community forums where over 25,000 users interact to solve day to day problems and share ideas. We encourage you to visit, invite you to participate and look forward to your input and opinions. Acrobat 3D, AutoCAD, Catia, Inventor, IronCAD, Creo, Pro/ENGINEER, Solid Edge, SolidWorks, and others.
For sheetmetal parts that are fabricated on a brake, it's best to model them with the Generative Sheet Metal workbench. These special solid models can then be flattened, and drawings can be generated.
If you already have a solid you modeled with the Part Design workbench, the solid cannot be flattened with CATIA. However, most solid models can usually be converted to sheetmetal solids with the Generative Sheet Metal workbench and then flattened.
Complex sheetmetal parts that cannot be fabricated on a brake can be flattened with the Aero Sheet Metal workbench.
If you have a surface model of a sheet part, offset the surface to obtain the neutral surface, and this can be unfolded (flattened) with the Developed Surface tools