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  #1  
Old 06-14-2014, 05:56 PM
Namaan Namaan is offline
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Default manufacturing process for triple flanged hoops?

i have been curious as to how triple flanged hoops are manufactured for some time...anybody out there got an answer on this??
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Old 06-14-2014, 06:06 PM
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Dodeska Dodeska is offline
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Default Re: manufacturing process for triple flanged hoops?

Erm...in a press of some sort?
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Old 06-14-2014, 06:18 PM
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Default Re: manufacturing process for triple flanged hoops?

When the Keebler Elves are done making cookies, they work nights supplying the world with triple flanged hoops. So elves make them. Really.

Probably starts out as a straight bar of steel. Then the flanges are imparted to the metal, then it's bent in a circle and joined. I totally made that up. I haven't the slightest clue how triple flanged hoops are made. They are probably stamped out by a 100 ton press because I never recall seeing any seams.
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Old 06-15-2014, 03:54 AM
Tommy_D Tommy_D is offline
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Default Re: manufacturing process for triple flanged hoops?

https://www.youtube.com/watch?v=za3z_IbVfHs

Start watching at 2:07. Its the same concept for how hoops are made.
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Old 06-15-2014, 04:08 AM
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Default Re: manufacturing process for triple flanged hoops?

A strip of steel is pulled through a die where it is folded into shape. It is then cut to length, rounded, and welded at the ends. A stamping machine completes the process by punching out the tension rod holes before plating.
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Old 06-15-2014, 06:22 AM
Michaelocalypse Michaelocalypse is offline
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Default Re: manufacturing process for triple flanged hoops?

As mentioned, it probably starts as some sort of bar stock and is run through dies and presses, cut to length, welded and chromed.
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Old 06-15-2014, 09:27 AM
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Default Re: manufacturing process for triple flanged hoops?

Quote:
Originally Posted by larryace View Post
When the Keebler Elves are done making cookies, they work nights supplying the world with triple flanged hoops. So elves make them. Really.

Probably starts out as a straight bar of steel. Then the flanges are imparted to the metal, then it's bent in a circle and joined. I totally made that up. I haven't the slightest clue how triple flanged hoops are made. They are probably stamped out by a 100 ton press because I never recall seeing any seams.
You had me going there with the Keebler Elves, Larry ;)

Now I'm kinda' disappointed you've told the truth. Some things belong in the realm of magic, you know.
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Old 06-15-2014, 05:40 PM
tamadrm tamadrm is offline
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Default Re: manufacturing process for triple flanged hoops?

You mean it's not done with fairy dust?Dies and rollers it is.

Steve B
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Old 06-15-2014, 06:14 PM
jornthedrummer jornthedrummer is offline
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Default Re: manufacturing process for triple flanged hoops?

I have never noticed a joint on a triple flange hoop and don't think its roll forming.
More likely its stamped out of a sheet of metal.
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Old 06-15-2014, 06:36 PM
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Default Re: manufacturing process for triple flanged hoops?

I'm going with the stamping process, but I'm still guessing. It's a lot quicker than welding each individual hoop.
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Old 06-15-2014, 07:21 PM
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Default Re: manufacturing process for triple flanged hoops?

This patent and application have useful information about flanged drum hoops.

https://www.google.com/patents/US8367917

https://www.google.com/patents/US20120174733

It is a lot cheaper to start with a flat strip of metal, about 1.5" wide by about 1/8" thick (sizes vary according to design), roll it into a hoop or ring, weld the ends and then press/ forge/ stamp the welded rolled hoops into a drum rim triple flanged shape.

It is hard to see the welds, and most likely because there is a chrome or nickel plating over the flanged hoops, and they grind the welds smooth after they weld the ends together. They would apply a heat treatment to make the hoops harder prior to plating. A polishing process is done so everything looks good for the camera. The patent has the polishing prior to putting the flanged ears on, that may or may not be true. I would think polishing would be the last operation prior to inspection because there is a risk of damaging the finish.
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Old 06-15-2014, 07:24 PM
Namaan Namaan is offline
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Default Re: manufacturing process for triple flanged hoops?

Thanks to all for the input,

i had an idea that they were pressed into shape. sadly it seems that elves have little to do with it :P
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Old 06-15-2014, 09:37 PM
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Default Re: manufacturing process for triple flanged hoops?

Yup welded, could call it 'seamless' cuz you can't see the weld due to finishing.


Quote:
It is hard to see the welds, and most likely because there is a chrome or nickel plating over the flanged hoops, and they grind the welds smooth after they weld the ends together.
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Old 06-15-2014, 10:26 PM
drumming sort of person drumming sort of person is offline
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Default Re: manufacturing process for triple flanged hoops?

Bent into shape and welded.
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Old 06-15-2014, 10:50 PM
Michaelocalypse Michaelocalypse is offline
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Default Re: manufacturing process for triple flanged hoops?

Quote:
Originally Posted by jornthedrummer View Post
I have never noticed a joint on a triple flange hoop and don't think its roll forming.
More likely its stamped out of a sheet of metal.
Looks closely on the inside of the hoop. You'll find evidence of welds that are ground down and then chromed.

Quote:
Originally Posted by larryace View Post
I'm going with the stamping process, but I'm still guessing. It's a lot quicker than welding each individual hoop.
It's not that much quicker, and it's A LOT cheaper to use dies and weld the joint than to press the whole thing and still need to roll the last bend in it.
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Old 06-16-2014, 01:58 PM
mpthomson mpthomson is offline
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Default Re: manufacturing process for triple flanged hoops?

Many moons ago, when Sonor still made seamless snare drum shells, their triple flanged hoops were also spun seamless ferro-manganese steel.

Now, their TF hoops are rolled and welded like everyone else.
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  #17  
Old 06-21-2014, 01:05 AM
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evolving_machine evolving_machine is offline
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Default Re: manufacturing process for triple flanged hoops?

Quote:
Originally Posted by Les Ismore View Post
Yup welded, could call it 'seamless' cuz you can't see the weld due to finishing.
Seamless is very different, it means they did not weld it together. Seamless pipe is no welds, seamless tubes are not welded.
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