Describe the practice for representing a sheet metal part is with only the formed sheet metal part model and flat pattern.
What will be an ideal response?
Some CADD systems provide tools and options that assist building an accurate 3D model of a formed sheet metal part. The model is used for design and manufacturing, can be unfolded to create a flat pattern, and can be shown as a pictorial representation on a 2D drawing. A flat pattern extracted from a folded part model can be dimensioned using standard unidirectional, rectangular coordinate dimensioning without dimension lines, or tabular dimensioning systems. The flat pattern dimensions take into consideration material bending so the final bent part is exactly as designed.
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