More show and tell. It’s easier to show a flanging machine in operation than try to describe it to you. Here is a short minute and a half video. The head being flanged is so small that the upper center post can’t be used. Instead, the head is bolted to an adaptor, which is a bearing pack bolted onto the lower center post. The head itself is bolted to the adaptor. The icr roll, which is bolted to the end of the shaft (which an electric motor rotates) makes the head spin. The forming roll, manipulated by the operator, shapes the spinning head around the spinning icr roll. We have many different size icr rolls, to form whatever size corner the customer requires. The two side rolls merely stabilize the head as it spins. You can see the upper center post back out of the way, since it is not being used.
Here is a brief video of a larger head being flanged. Not much is shown, but you can see how the two center posts line up to hold the head in place as it spins. Notice the icr roll being used this time is much sharper, making a smaller sharper inside corner.
Another video of a flanging machine. The quality is much better – it has music! It was done by Italians, of course the quality is better. Notice the several icr rolls sitting on the floor by the machine. We change these out to create whatever inside corner radius is required. Also, this video must be watched on You Tube (why? I don’t know). But by clicking on the link it opens another window, so merely close that window after viewing the video in order to return here.
One last video. This one is rather long, four minutes, but it shows the pressing operation along with the flanging operation. So it shows a flat circle of steel being transformed into a tank end. A couple of things to notice as you watch this video. Day changes to night while they are pressing this one head. Their pressing process is much slower than what I am used to. Also, this head does not have a center hole, it is being flanged no-hole. The head was centered up by the operator before he began, and it is held in place only by the pressure applied against it by the upper and lower center posts. But the operator has let it slip off-center; by the end of the flanging process one side of the head is much higher than the other. He did a terrible job. Also, running a flanging machine is a one-man job. Having that many men stand around watching me work would make me nervous. No wonder he screwed up the head.
I hope this helps you to understand what a flanging machine does.