Most of today's candidates are hashtag-laden shorts or factory promo clips, but this CADTech tutorial actually teaches a skill: how to model a real sheet metal part in Siemens NX, from contour flange through to a flattened pattern ready for the brake.

If you've ever fabricated a bracket or enclosure, you know the gap between sketching something on paper and producing a part that actually folds correctly. The flat pattern step is where amateurs get burned — bend allowances, K-factors, and material thickness all conspire to make a "perfect" CAD model unbuildable. This video walks through the NX workflow that handles those calculations for you, including:

Contour flange for creating the primary walls, tab features for adding flat extensions, standard hole placement with proper sheet metal hole tables, and the bend command for adding controlled folds. The payoff is the flat pattern at the end — a DXF-ready unfolded view that a laser or waterjet shop can cut directly.

NX is pricey enterprise software, but the underlying concepts (bend deduction, neutral axis, relief cuts) translate directly to SolidWorks, Fusion 360, and Inventor. Watch this even if you don't use NX — the workflow logic is what matters, and CADTech explains the why behind each feature rather than just clicking through menus.