Hi, Mirco.
If you use the basic sheet module, there is no possibility to create a fold table, but you can only in development decide a k to be used for calculation.
if you use the advanced sheet module (to understand what costs almost as much as the basic module of element direct creo intended mainly for those who do sheeting from morning to evening) then in that case you have a configuration file, or rather a workshop file where you can define the fold tables by binding them to the materials you use, thicknesses and fold tools. the thing is very interesting but also quite complex to do because within the program you find an example scheme that goes all built according to the machines and equipment you have in the workshop. the program is done in lisp, for example if you have a trumpf bending machine and the software properly configured can even pass directly the 3d model to the bending machine.
if it can be useful to you I can get you an excel file that I had done a little time ago for calculating factor k on the basis of rule din6935.
a greeting, stefano