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Old 11-26-2012, 01:28 PM
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Smile Need advice on bending 3" x 1/2" bar stock

I'm using this Heavy Duty 20 TON Press Brake DIY Builder Kit, here.

Picture is 20 ton press with heavy duty kit, which I using, below.

32-Ton Heavy Duty Air Hydraulic Bottle Jack, here.

19" = Full bending width of the bottom die on anything 3/16" or thinner.
15" in 1/4"
13" in 5/16"
11" in 3/8"
6" in 1/2"
3" in 5/8"

What about changing 20 ton Air over Hydraulic to a 32 ton. Two up rights are 4"x 3/16" channel. Bending platform is double 4"x 3/16" channel. Support round bar stock are two 3/4" pins.

Things I think have enough beef.

1) Press bar is 4" 3/16" channel. Press plunger is directory under bottle jack, See picture.

2) 3/4" x 19" v press bar.

3) 19" v block.

4) Support 1" bending blocks.


Things I can to to beef up press.

1) Bending platform to double 4"x 1/4" channel.

2) Support round bar stock to 1" pins.
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Last edited by Vern2; 11-26-2012 at 01:40 PM.
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  #2  
Old 11-26-2012, 02:07 PM
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heat and beat???
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Old 11-26-2012, 02:08 PM
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Can't tell from the pics but if your bottom die is 2" wide then you need a lot more than 20 tons to bend 3 x 1/2 flat. With a 3" wide (6x width) bottom you need about 15 tons. If you move to an 8x bottom die tonnage drops to about 11. Rather than beef up the press I would just make up a wider bottom die. A bottom die opening of 8x material width is usually considered to be the "normal" size; 6x is pretty narrow and only used if you want a really tight inside corner or if you're going to hot bend...
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Old 11-26-2012, 09:36 PM
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Shade Tree Welder,

I don't have use for acetylene. Use 180 amp Meg and Plasma for cutting.

LKeithR,

Really didn't think of that. I've been doing some 19" x 1/8" plate, so the 19" x 2" v block has come in handy.

Do you have an Idea how I can build a 5" wide V block. I'm thinking it does not have to be V shape. What size material, bracing and depth for a 6" long block.

Might look at changing my 19" V block to 4", with 3" x 1/4" angle iron and also upgrade to 32 ton, that will increase my bend material sizes. I'll add a 1/2" bending block die, any suggestions, Pic 1 (using 1/2" material). I've setup my base plate with 2" wide slot x 1/2" deep, mounting for all dies I'm building to fit onto press.
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Last edited by Vern2; 11-26-2012 at 10:13 PM.
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  #5  
Old 11-27-2012, 12:15 AM
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Cut some firewood. Build a fire, roast some wieners and heat your steel to bend.

I've pressed quite a few things on a Harbor Freight press that looks exactly like yours. No way would I even want to be in the building if you start pressing with a 32 ton jack on that frame.
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Old 11-27-2012, 12:59 AM
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Take a piece of plate, and weld two pieces of 2" hot rolled round stock to the plate. Space so that a framing square corner can bottom on the plate between them, to give you the eventual 90.
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Old 11-27-2012, 02:46 AM
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Vern, where did you get your press brake? I've been thinking about getting one similar but have yet to locate it. I've made similar ones to what Ironman described, but the end pins would help keep everything more square, and lined up.

OleDog
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Old 11-27-2012, 08:10 AM
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OleDog,

20 ton Press

Hydraulic jack

Ironman,

I always thought that would work. I did ask my metal supplier a while back about there hot rolled round stock, 1 1/2 was there max size. Should I bother with that?

PlasmaCam (Gotorch project)

1) Getting Advance Machine Control, turned on today Nov 27, 2012.

Note: Having my local welding supplier dig up these parts.
Hypertherm PowerMax 45 - ready to connect.
220-669 Electrode $33.00 - 5 ea
220-670 Swirl Ring $13.13 - 1 ea
220-671 Nozzle $17.23
220-673 Shield $10.80 - 1 ea
220-719 Ohmic-retaining cap

2) Got Advance Torch Height Control (Ohmic) turned on last week.

3) Got Advance DesignEdge turned on.

4) Now just start the beginnings of a 2' x 2' table.

Note: Roughly 3' x 3' x 3' Cube, 40' of 2" x 2" x 1/8".
Also got 1 1/2" x 1/8" hot rolled 40'.
Setting on floor of shop.
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  #9  
Old 11-27-2012, 06:20 PM
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If it is a one time thing you can either heat it and then use your press brake, or give me a call and you can come over and use the bending dies in my ironworker.
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  #10  
Old 11-27-2012, 07:12 PM
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Walker,

It may be a one time thing, I would still like to be able to do it again for me or a friend. Thanks for the offer!

SmokinDodge,

Me and fire don't get along.

Vern
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