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Was just wondering if there are any tricks or techniques to determine the radius that is needed on a Manual rollerof course to have a wider/bigger circle, the 2 lower rolls need to be moved apart. and the complete opposite for a smaller roll."weberwerke-siegen" is the brand name of the roller, i have no idea which modelOn this particular industrial roller, there is no guage and these bottom rolls need to be moved manually- Is there some kind of chart that shows the measurements of the distance between the bottom rolls to determine radius of the roll?or any way of figuring this out? including plate thickness etcim not sure the diameter of the bottom rolls at this moment.Any information would be greatly appreciatedThank you in advanceLast edited by then3wguy; 05-12-2011 at 04:10 AM.
Reply:recommend some trial and error.
Reply:The amount of spring back will probably mean one setting of the rollers won't make the same radius on different material. So there's no way they could make a chart.Dynasty200DX w/coolmate1MM210MM VintageESAB miniarc161ltsLincoln AC225Victor O/A, Smith AW1ACutmaster 81IR 2475N7.5FPRage3Jancy USA1019" SBAEAD-200LE
Reply:I have never used a roller, but would suspect that you could get large rings with the rolls close together, you just wouldn't need to bring the moveable roll as much. wider spacing would make it easier to bend heavier material, as long as the spacing is a bit smaller than the diameter of the ring. it would seem like someone would have some good instructions for you-- fredLincoln 180C MIG
Reply:I have one of the HF manual rollers I use to make rings out of 1/2" square tubing. To make a ring, I figure the circumference of the finished product, cut the stock to that length plus 3" (to allow for the flat spot on either end), then roll it. I bring the ends together beyond the flat spots, then cut off the ends to get my rolled ring.No charts, just a simple calculation of the circumference based on diameter.MarkI haven't always been a nurse........Craftsman 12"x36" LatheEnco G-30B MillHobart Handler 175Lincoln WeldandPower 225 AC/DC G-7 CV/CCAdd a Foot Pedal to a Harbor Freight Chicago Electric 165A DC TIG PapaLion's Gate Build
Reply:I have never seen an effective way to roll to a specific setting. Even with a digital reader giving positions of the rolls it was not consistent. One of the primary factors is that hot rolled steel varies in yield strength even between heats in the same rolling mill. A digital reading will only get you in the ball park. After the first roll through you can adjust and run through again. If you get the correct radius after the second or third roll through don't think that setting will work for the next new piece you are going to roll. If you keep that setting your second piece will be rolled too tight. The reason for this problem is that when you roll the material even once it work harden and you have to use more pressure to exceed the yield strength and get the material to bend. If I want to roll material in one pass I expect to experiment with 3 to 5 pieces before I discover that setting. After I have rolled those 20 plus pieces in one pass I have to go back and fix my trial pieces using multiple passes. I discovered that aluminum plate is more consistent but have got caught when halfway through a stack on a pallet the bend setting suddenly is wrong. Even aluminum plate varies from batch to batch.
Reply:unless you're talking a large hydraulic machine, ring rollers work a little bit at a time. add pressure and roll, add pressure and roll...its easy to creep up on the radius you want... |
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发表于 2021-9-1 00:15:33