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How to design a dome ready for metal spinning (sheetmetal, form tools?)

Question asked by Jacob Murray on Jan 1, 2019
Latest reply on Jan 2, 2019 by Frederick Law

I am making a new stainless holder for the family's fire pit as the old mild steel one has rusted out.

IMG_20181229_104607.jpg

I have looked at some manufacturing videos and it seems the easiest way to make these (for low runs) is metal spinning. I know I can send the final model to the manufacturer and let them work out what piece to start with, however I'd like to know how to work out the blank/flat pattern size myself and how to model it in Solidworks.

Does anyone know how I should be approaching this? Should I create a form tool for it, or model it from the sheetmetal toolbox somehow?

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