why my sheet metal parts are not creating the default Flat-Pattern configuration?
SW does not automatically create a flat pattern configuration for sheet metal parts. You can do it by selecting the "flatten" command and saving the display as a separate configuration or just toggling it off and on(suppress) in the FMT.
If you create drawing from sheet metal part SW automatically creates the Flat-Pattern view for drawing, and DefaultSM-FLAT-PATTERN configuration in part.
I've added that as an IDEA here:Flat Pattern Configuration
You may also try these program for adding a flat pattern configuration: https://forum.solidworks.com/message/448896#448896
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