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Posted by Curt Welch on July 15, 2008, 2:59 pm
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> Ok... there are obviously sheet metal brakes out there to do this, but
> the price gets up there pretty quickly.
You can make your own for not much money.
The Miller welding site has a list of simple projects with plans and a
sheet metal break is one of them....
http://www.millerwelds.com/interests/projects/bending-brake/
> I was wondering if it would be
> practical bend some small pieces of aluminum in my hydraulic press by
> positioning them between a couple pieces of steel angle iron or perhaps
> making some "special" angle with a sharp inner corner or rounded outer
> corner to better match the two pieces and get a more uniform bend. Not
> a lot of work this way. Just some simple one off stuff.
Sure, that would work. As the other poster said, that type of
configuration is the standard way it's done in industry. But of course,
the dies are custom made tooling with a female tool steel V block at the
bottom and a mail V block in the top.
Here's an example of a typical Hydraulic Press Break...
http://www.betenbender.com/Press%20Brakes.htm
As the other poster said, if you just use angle iron alone it might not be
strong enough. You might have to reinforce it one way or another to keep
it from bowing. It's just a function of how much force it takes to bend
the aluminum and how large and strong of an angle you use. I'd just
experiment and adjust as needed to make it work. If you have a press
strong enough to do it, it sounds like a good way to do it.
> The second part of my wondering, and hence the cross post, is would this
> result in to much contamination of the aluminum for good quality welding?
Shouldn't be an issue. As the other person said, make the steel surfaces
smooth and clean and the contamination should be minimal. Just clean the
aluminum (as is always advised) before welding.
> Bob La Londe
> http://www.YumaBassMan.com
The clamp and hammer solution as suggested by the other poster is also dead
simple and very effective. I just did that this morning to make an
aluminum bracket to attach a tall cabinet to the wall. Creating dies for
your press will probably produce better bends but will take you a bit more
time and effort and experimenting to get it working correctly.
--
Curt Welch http://CurtWelch.Com/
curt@kcwc.com http://NewsReader.Com/
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Posted by Ned Simmons on July 15, 2008, 4:36 pm
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wrote:
>Ok... there are obviously sheet metal brakes out there to do this, but the
>price gets up there pretty quickly. I was wondering if it would be
>practical bend some small pieces of aluminum in my hydraulic press by
>positioning them between a couple pieces of steel angle iron or perhaps
>making some "special" angle with a sharp inner corner or rounded outer
>corner to better match the two pieces and get a more uniform bend. Not a
>lot of work this way. Just some simple one off stuff.
This works well for me for short bends:
http://www.suscom-maine.net/~nsimmons/news/ArborPressBrake01.jpg
http://www.suscom-maine.net/~nsimmons/news/ArborPressBrake02.jpg
Longer bends. Those are v-bottomed grooves milled in the stock with a
single flute countersink in the first pic.
http://www.suscom-maine.net/~nsimmons/news/Mailbox00.JPG
http://www.suscom-maine.net/~nsimmons/news/Mailbox01.JPG
http://www.suscom-maine.net/~nsimmons/news/Mailbox02.JPG
--
Ned Simmons
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Posted by Bob La Londe on July 15, 2008, 7:16 pm
Please log in for more thread options > wrote:
>
>>Ok... there are obviously sheet metal brakes out there to do this, but
>>the
>>price gets up there pretty quickly. I was wondering if it would be
>>practical bend some small pieces of aluminum in my hydraulic press by
>>positioning them between a couple pieces of steel angle iron or perhaps
>>making some "special" angle with a sharp inner corner or rounded outer
>>corner to better match the two pieces and get a more uniform bend. Not a
>>lot of work this way. Just some simple one off stuff.
>
> This works well for me for short bends:
> http://www.suscom-maine.net/~nsimmons/news/ArborPressBrake01.jpg
> http://www.suscom-maine.net/~nsimmons/news/ArborPressBrake02.jpg
>
> Longer bends. Those are v-bottomed grooves milled in the stock with a
> single flute countersink in the first pic.
> http://www.suscom-maine.net/~nsimmons/news/Mailbox00.JPG
> http://www.suscom-maine.net/~nsimmons/news/Mailbox01.JPG
> http://www.suscom-maine.net/~nsimmons/news/Mailbox02.JPG
Interesting stuff. I actually have a hydraulic press. Don't think I'ld
have the strength to much bennding with a manual press. A few weeks ago I
wanted to due some stuff, and found the seals where bad on the jack in mine,
so I replaced it with an air operated one. Whoooooeeee! Now that some cool
sh, er, stuff. I used it to straighten a shaft on something. Roll, mark,
bend, roll, mark, bend. And talk about fast. I wish I'ld ponied up for an
air operated jack a long time ago. I then figured out an easy way to gget
the jeck in and out so I can use it for other stuff. I just extend it, put
in two blocks, and then release pressure. Takes about ten seconds to take
the jack out so I can use it for things like lifting trailers and trucks.
Now, I'm thinking about getting a longer air operated ram for my cherry
picker too. Work is kinda fun when you have cool tools to do it with.
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Posted by Richard J Kinch on July 16, 2008, 12:02 am
Please log in for more thread options Ned Simmons writes:
> http://www.suscom-maine.net/~nsimmons/news/Mailbox02.JPG
You're really dating yourself with that tape moistener.
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Posted by spaco on July 15, 2008, 9:57 pm
Please log in for more thread options I do this in my hydraulic press.
Go to: http://www.spaco.org/Press.htm
I don't know about the contamination, but I doubt if it would be
problem. I'd say that more alumimum is going to rub off on the steel of
the dies that the other way around.
Pete Stanaitis
------------------------
Bob La Londe wrote:
> Ok... there are obviously sheet metal brakes out there to do this, but
> the price gets up there pretty quickly. I was wondering if it would be
> practical bend some small pieces of aluminum in my hydraulic press by
> positioning them between a couple pieces of steel angle iron or perhaps
> making some "special" angle with a sharp inner corner or rounded outer
> corner to better match the two pieces and get a more uniform bend. Not
> a lot of work this way. Just some simple one off stuff.
>
> The second part of my wondering, and hence the cross post, is would this
> result in to much contamination of the aluminum for good quality welding?
>
> Bob La Londe
> http://www.YumaBassMan.com
>
>
>
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> the price gets up there pretty quickly.