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Old 02-08-2020, 04:10 PM
Mr fixit Mr fixit is offline
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Default Round cylinder 16ga question

Hi Group,

I'm making a round cylinder out of 16ga steel that is already shaped enough to weld the seam together. I'm using a 4" pipe with hammers and dollies too.
I've got a egg shaped piece, do I work OFF dolly or ON dolly on the 4" pipe to round the cylinder.
I started with the sheet metal brake to get the starting shape and have worked it to weld the seam but I can't seem to get the egg to round out.

Look forward to any suggestions.
TX
Mr fixit
Chris

Last edited by Mr fixit; 02-08-2020 at 04:10 PM. Reason: added "steel"
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Old 02-08-2020, 04:41 PM
Jaroslav Jaroslav is offline
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Chris. Can you add a photo ? I have a poor translation for the understanding.
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Old 02-08-2020, 05:15 PM
Mr fixit Mr fixit is offline
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Hi Jaroslav,

I'll have to get back to you I'm back in the shop it might be later. The cylinder is 6" OD when round and is 10" long if that helps invision what I'm doing.
This is for a filter system for my dust collector for a media blasting cabinet I'm restoring.

TX
mr fixit
Chris
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Old 02-08-2020, 06:01 PM
Gareth Davies Gareth Davies is offline
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You would need to be off dolly on the undershaped sections but it will work a lot quicker if you’re not tacked up yet. Another method I use is to trap the part between 2 pipes and push down on it to get the shape into the ends, even if you overdo it. It’s far easier to knock some shape out of it after welding than it is to put it back in. Hope that helps.
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Old 02-09-2020, 12:26 AM
Mr fixit Mr fixit is offline
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Well I got it done with a little OFF dolly and some patients just working around it ON dolly at the end.

The cylinder is for part of the ducting for the blower housing in the background for the reclaim media blaster dust collection system that I'm putting together. The other is for the secondary filter canister.

IMG_20200208_160410447.jpg

IMG_20200208_160500633.jpg

IMG_20200208_160423348.jpg

Last edited by galooph; 02-09-2020 at 05:43 AM.
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Old 02-09-2020, 03:57 AM
Jaroslav Jaroslav is offline
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If you use a pipe as an anvil, use a wooden or rubber mallet to bend. Flat spots should be curved after. Maybe.
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Old 02-09-2020, 12:28 PM
Mr fixit Mr fixit is offline
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Thanks for tutoring in metal shaping fellas. Again I have learned from you guys, hopefully next time it won't take 6 hrs to make a simple cylinder with your suggestions.

TX
Mr fixit
Chris
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