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Sheet Metal Development Blog
How sheet metal parts are laid out, formed and fitted: notes from the shop floor and from building Unfoldo.
BasicsInside, mean or outside: how sheet thickness changes a flat patternWhy a pattern laid out on the wrong diameter leaves a gap at the seam, how much it costs on real parts, and which size to use for each job.
TransitionsSquare to round transition: how to lay out the flat patternLay out a square to round by triangulation: the true lengths, a worked 600 to 400 mm example, where to put the seam, and how thickness changes it.