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Unread 08-01-2010, 08:49 PM   #1
flatlander757
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Built a midget press brake

Needed to bend some small 1/8" strips of steel so I made this out of what I had laying around... works pretty well:



One of those pieces is 1/8" the wider one is 3/16"

And I was surprised it even bent 1/4"



It's made out of some cheap pipe, 1/8" angle, and 1/4" wall 2" sq tube.

I think I'm going to build a larger one to make normal sized brackets and stuff.

How are you guys making multiple 90 degree bends(to make a |_| kind of bracket) with those bends within 1.5-2 inches of each other when the side legs are kinda long? My issue is the last bend making the bracket want to hit the press... trying to make a larger brake so I can make bends as close as possible to each other and bend 1/4" up to 6" in length.

Discuss.

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Unread 08-01-2010, 09:15 PM   #2
ZeroGravity
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So how does it work?
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Unread 08-01-2010, 09:17 PM   #3
Joe Dillard
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Pretty cool.

Quote:
Originally Posted by flatlander757 View Post
How are you guys making multiple 90 degree bends(to make a |_| kind of bracket) with those bends within 1.5-2 inches of each other when the side legs are kinda long?
I cheat and use a couple local shops do bending for me.
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Unread 08-02-2010, 12:31 AM   #4
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Stupid proxy. All I see is red X's.
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Unread 08-02-2010, 10:31 AM   #5
flatlander757
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Quote:
Originally Posted by ZeroGravity View Post
So how does it work?
You place the bottom piece on a shop press... the piece that looks like this:

|V|


Then you place the piece you want to bend on top.


Then the top piece that looks like this...

__
\ /

Goes over the piece to be bent, you lower the press to compress the metal between the two "dies" if you will and it bends the metal.

It can do about an 80 degree bend, you gotta watch it towards the end to make sure you don't over-bend it so you don't have to tweak it if you want a perfect 90.

I'll take a pic and/or video to show it later tonight.
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Unread 08-02-2010, 10:51 AM   #6
Unlimited04
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I like it! nice idea
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Unread 08-02-2010, 12:18 PM   #7
Area.3.Fiftyone
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What is that snot all over it?

Is that supposed to be some kind of a weld?

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Unread 08-02-2010, 01:08 PM   #8
flatlander757
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Hahaha no... the one really bad piece is ooooold when I was learning and playing around. Newest stuff is anti spatter sprayed where it's gotta be smooth
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Unread 08-04-2010, 10:41 AM   #9
flatlander757
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Video finally uploaded... here you go:

YouTube - video-2010-08-02-20-44-07
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Quote:
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Being able to make vroom vroom noises in Tonys Jeep was the highlight of my life.
Currently Jeepless.
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Unread 08-04-2010, 03:20 PM   #10
05Whiterubi
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WOW!! I'm in the process of building a mini shop press and fabricating something to be able to bend some steel strips, and I LOVE to see that a so simple design works so well!!

One question: You mention in the video that you made it so that you can go a little bit further than 90 degrees, which is something that I would also like. What did you do to accomplish it?


And about your question

How are you guys making multiple 90 degree bends(to make a |_| kind of bracket) with those bends within 1.5-2 inches of each other when the side legs are kinda long? My issue is the last bend making the bracket want to hit the press... trying to make a larger brake so I can make bends as close as possible to each other and bend 1/4" up to 6" in length.

I found some months ago in another forum these images, which show a more complex approach:





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Unread 08-04-2010, 03:37 PM   #11
Eaglekeeper
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Great tip and thanks for posting. Thread came at a perfect time. I need a few heavy brackets and now know a simple way to make them.
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Unread 08-04-2010, 05:18 PM   #12
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Unread 08-05-2010, 09:50 AM   #13
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Quote:
Originally Posted by 05Whiterubi View Post

One question: You mention in the video that you made it so that you can go a little bit further than 90 degrees, which is something that I would also like. What did you do to accomplish it?

Just make the dies at an 85deg angle instead of 90. That allows you to account for "spring back".

I have a similar bender that I made a few years back. I experimented until I was able to mark the bender for pretty consistent 90deg bends in the various brackets that I run thru it. I've made hundreds and hundreds of bends in my bender. Matter of fact, the "V" die has rounded edges from wear.

With "air bending", another thing you can use for the bottom "V" is a pair of solid rods welded about 2" apart (parallel). Just make sure it's deep enough that you don't bottom out your material before you hit a 90deg bend. Also keep in mind that trying to bend thicker metal (like 1/4") into too sharp of a radius will crack it. I think the general rule of thumb is a "V" die opening that is approx 10X the thickness of the steel.... 3/16"=1.88..... 1/4"=2.5"... etc. Although with smaller width brackets, you can usually tighten that measurement up a little without cracking.

Edit: Looks like Netpackrat's bender is using the two round rods.
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Unread 08-05-2010, 11:20 AM   #14
05Whiterubi
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Thank you very much for the VERY detailed explanation! These advices and the video and the pictures that appear in the thread are extremely useful and I am sure that will help me really a lot when I have the necessary time to fabricate my press brake!

Thanks again and if you do not mind, I will post some pics of my brake when it is finished
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