Maintaining flat-pattern accuracy when exchanging sheet metal drawings

[indiancad]

In sheet metal design, a 3D folded model and its 2D flat pattern must agree with the actual manufacturing requirements. Small differences in bend allowance, inside radius, material thickness, or K-factor can produce incorrect developed dimensions.

This becomes particularly important when drawings are prepared in one CAD application and the flat patterns are exported as DXF for CNC cutting.

How do you maintain consistency between the folded model and the exported flat pattern? Do you rely on CAD-generated bend calculations, manufacturer-specific bend tables, or independently verify the developed dimensions?