How estimate force

[mmaleki]

Dear All
Thanks inadvance for your kind attention.
Is there any one to show me how to estimate force for spining forming a metal plate.
As you know, heads of pressure vessle are elleptical form.you will find in attchment a sketch to clarifing force and mechanism of forming.
Please be informed material is carbon steel.
kind Regards,
M.Maleki

 

[Wrenchbender]

I noticed no one is answering your post. Did you try the mechanical engineering section? It should be a do-able problem based on first principles. Did you check the flat circular plate section in Roark - 'Formulas for Stress and Strain'? I found nothing quantitative in Machinery's Handbook or the AMS Handbook, although the process descriptions are very good in the latter. You might try contacting the manufacturer of the spinning equipment. They should at least have some empirical data. (How else can they sell the appropriately sized tooling to a customer?) Judging from the thickness of the plate, it would probably have to be hot formed, or done on a forging press.

 

[cloa]

Don't double post especially in the same subforum.

 

[chicopee]

I have seen spinning of thin materials into cups and lids with lathes but nothing of that thickness . For that thickness the head would have to be heated into the red region so as to form the knuckle. I have seen straight tubes heated red to form corrugated furnaces used on fire tube boilers and the corrugation was formed with rollers and were not spun.