Jeep-Power
Plastic
- Joined
- Apr 9, 2009
- Location
- North Plainfield, NJ, USA
Hey folks-
we are a small (but important!) part of a prototype fab shop. My 'division' produces small perforated sheetmetal rings, mostly by hand. The size (# of pieces) of our orders are growing and we need to figure out how to accurately shape the rings, faster. Currently we use a hardened & polished mandrel (turned to a specific size, per the order) and small brass hammers. Yeah-- it is archaic, but with some practice we can get them within 0.040mm, or less. A typical part might be about 40MM Dia x 10MM wide x .6MM thick. We cut the perforated & formed strip to a precise length, form it sort of round in a sort of press, weld the ends together in a custom resistance welder, then precisely round them, as described above
I have done large (3ft diameter) rings on one of those huge industrial rolling machines, but that was not precision work.
Any suggestions on how to roll a ring like this, holding a +/- 0.150MM tolerance on the diameter?
The boss is asking us to modify a small/cheap ring roller ($200 range), but it is looking like a goose chase.
Anyone have an idea that works? Internet searches have led me to large hot-forged rings, but nothing as small & precise as we do.
thanks for reading!
we are a small (but important!) part of a prototype fab shop. My 'division' produces small perforated sheetmetal rings, mostly by hand. The size (# of pieces) of our orders are growing and we need to figure out how to accurately shape the rings, faster. Currently we use a hardened & polished mandrel (turned to a specific size, per the order) and small brass hammers. Yeah-- it is archaic, but with some practice we can get them within 0.040mm, or less. A typical part might be about 40MM Dia x 10MM wide x .6MM thick. We cut the perforated & formed strip to a precise length, form it sort of round in a sort of press, weld the ends together in a custom resistance welder, then precisely round them, as described above
I have done large (3ft diameter) rings on one of those huge industrial rolling machines, but that was not precision work.
Any suggestions on how to roll a ring like this, holding a +/- 0.150MM tolerance on the diameter?
The boss is asking us to modify a small/cheap ring roller ($200 range), but it is looking like a goose chase.
Anyone have an idea that works? Internet searches have led me to large hot-forged rings, but nothing as small & precise as we do.
thanks for reading!