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Posted by M Cuthill on September 29, 2006, 5:06 pm
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Time to delurk for a while.
For an upcoming project, it looks as though I'm going to need to acurately
bend some 4 to 6 mm thick sheet (or should it be plate?) metal into partial
cylinders (max cylinder will be about 270 degrees). The max width I'll need
to form is 350mm, with diameters in the 5" to 8" range.
I've been searching for slip roll plans, but have so far failed in finding
anything suitable.
So, it looks as though I'm going to have to design my own slip roll.
The design I'm looking to build is one with two upper rollers that are
geared together, with a lower adjustable roller for setting the formed
diameter.
But the question is, what kind of forces are involved, what material would
be best of rollers, and most important, is this a suitable method for such
thick metal?
thanks
moray
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Posted by mark on September 29, 2006, 5:34 pm
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M Cuthill wrote:
> Time to delurk for a while.
>
> For an upcoming project, it looks as though I'm going to need to acurately
> bend some 4 to 6 mm thick sheet (or should it be plate?) metal into partial
> cylinders (max cylinder will be about 270 degrees). The max width I'll need
> to form is 350mm, with diameters in the 5" to 8" range.
>
> I've been searching for slip roll plans, but have so far failed in finding
> anything suitable.
> So, it looks as though I'm going to have to design my own slip roll.
>
> The design I'm looking to build is one with two upper rollers that are
> geared together, with a lower adjustable roller for setting the formed
> diameter.
> But the question is, what kind of forces are involved, what material would
> be best of rollers, and most important, is this a suitable method for such
> thick metal?
>
> thanks
> moray
>
>
>
> --
> Posted via a free Usenet account from http://www.teranews.com
On 4-6 mm probably a lot more force than you could apply by hand ...me
thinks
your going to have to think up someway to motorise it .
and heat the stuff at the same time.
all the best..mark
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Posted by Moray Cuthill on September 29, 2006, 6:27 pm
Please log in for more thread options > On 4-6 mm probably a lot more force than you could apply by hand ...me
> thinks
>
> your going to have to think up someway to motorise it .
Motorisation wouldn't be too much of a problem.
I'd prefer manual operated, and I'm not worried if it's got to have quite
low gearing to do it, as this project will only be a one off for now.
If becomes more than a one off, then I'd quite quickly be motorising it with
a hydraulic motor.
> and heat the stuff at the same time.
I've also got access to OA, but it means having to move everything 5miles to
use it, so it would be a needs must solution.
moray
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Posted by =?ISO-8859-1?Q?Nick_M=FCller?= on September 29, 2006, 5:48 pm
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> The design I'm looking to build is one with two upper rollers that are
> geared together, with a lower adjustable roller for setting the formed
> diameter.
Uh! That is a bit unhandy. The bent sheet will touch the table / stand.
All (I have seen) designs have two lower rollers and one upper roller.
> But the question is, what kind of forces are involved, what material would
> be best of rollers, and most important, is this a suitable method for such
> thick metal?
How wide do you want the rolls to be? How thick is the sheet metal?
Nick
--
The modular DRO
<http://www.yadro.de>
Engine models
<http://www.motor-manufaktur.de>
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Posted by Moray Cuthill on September 29, 2006, 6:14 pm
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>
>> The design I'm looking to build is one with two upper rollers that are
>> geared together, with a lower adjustable roller for setting the formed
>> diameter.
>
> Uh! That is a bit unhandy. The bent sheet will touch the table / stand.
> All (I have seen) designs have two lower rollers and one upper roller.
Good point!
Only reason I had the rollers around that way was I seen a picture of one
built that way during my searches, and it was built up on it's own stand, so
underneath was clear except for the connecting bar for holding it all
together.
>> But the question is, what kind of forces are involved, what material
>> would
>> be best of rollers, and most important, is this a suitable method for
>> such
>> thick metal?
>
> How wide do you want the rolls to be? How thick is the sheet metal?
Wide enough to form 350mm wide sheet.plate, and material will mostly be
either 4 or 5mm thick, but there may be the odd thicker, but narrrower bit.
moray
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>
> For an upcoming project, it looks as though I'm going to need to acurately
> bend some 4 to 6 mm thick sheet (or should it be plate?) metal into partial
> cylinders (max cylinder will be about 270 degrees). The max width I'll need
> to form is 350mm, with diameters in the 5" to 8" range.
>
> I've been searching for slip roll plans, but have so far failed in finding
> anything suitable.
> So, it looks as though I'm going to have to design my own slip roll.
>
> The design I'm looking to build is one with two upper rollers that are
> geared together, with a lower adjustable roller for setting the formed
> diameter.
> But the question is, what kind of forces are involved, what material would
> be best of rollers, and most important, is this a suitable method for such
> thick metal?
>
> thanks
> moray
>
>
>
> --
> Posted via a free Usenet account from http://www.teranews.com