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Drawing dimensions for holes in a sheet metal cylinder

Question asked by Daniel Caplan on Feb 1, 2016
Latest reply on Feb 1, 2016 by Dennis Bacon

Hello,

 

I'm having a problem adding dimensions to a sheet metal flat pattern in a drawing.  My part is a sheet metal cylinder that I made using the loft bend tool. I then extrude cut some holes through the cylinder wall while it was unflattened. When I make a drawing out of the flat pattern, SW will cannot create a reference dimension for the holes.

 

My assumption is that while the holes are round when the part is unflattened, they are not so round in the flat pattern. How can I make holes in a cylindrical sheet metal part that can will be treated as round in both the flattened and unflattened configurations?

 

Thanks,

Daniel

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