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67chevelle
02-26-2006, 10:51 PM
Hello all, I know this isn't exactly machining related, but I need some input.

I’m in the market for a tubing bender and possibly a hydraulic press. I’m looking for specific recommendations on brands and options. It seems that these 2 pieces of equipment are similar enough that there has to be some “all-in-one” units that may fit my needs. I need to bend round up to 2 inch and square up to 1.5 inch ( maybe a little more).

This bender looks pretty nice, but doesn’t incorporate the “press” that I also could use.

http://www.vansantent.com/model_4_bender.htm

Any helpful hints ?

Mark

Forrest Addy
02-27-2006, 01:57 AM
I always thought a log splitter had most of the essential ingredients to make a good bender, forging press, and horizontal press.

With suitable mods of course.

I wonder if thay make one with a 5 HP electric driven pump.

[This message has been edited by Forrest Addy (edited 02-27-2006).]

Ries
02-27-2006, 10:06 AM
Really, they are two different tools- for tube bending, you need rotary motion. For a press, you want vertical straight line motion.

If you are not doing production work, you could get away with the JD2 model 3, on the same website, that is a manual tube bender. It will do 2" tube. They work well, a lot of guys use em for motorcycle and roll cage work.

Hydraulic presses vary greatly in price- cheezy chinese jacks for 200 bucks, real 50 ton motorised ones for 5 grand.
You need to figure out exactly what you need- motorised, or armstrong powered? tonnage? size?
For simple stuff, there are lots of midrange chinese ones that work pretty well out of the box.
For all day heavy duty work, there is no substitute for big heavy steel frames, which cost money.

Dawai
02-27-2006, 10:59 AM
I built my own, a model three center holes drilled, torch cut from 3/4" thick metal.

I used it till the sweat made the floor slippery then added in a hydraulic pump, cylinder, and control.

http://img.photobucket.com/albums/v85/ibewgypsie/sscn1388.jpg
Real complicated to use, you type in the degrees, step on the pedal and it bends exactly, no waste. I design my bends with ezbend software. You can do it by paper and mess up a lot of tubing. I calculate the software has already been paid for.

YEAH, I could do one in a press, a rolling shoe. Take about a hour to make it work with existing shoes. *($200 each) www.homier.com (http://www.homier.com) has a press for $39 that should work.
My bender gets used when I get out to the shop.
http://img.photobucket.com/albums/v85/ibewgypsie/dscn1392.jpg
http://img.photobucket.com/albums/v85/ibewgypsie/Dscn1185.jpg
http://img.photobucket.com/albums/v85/ibewgypsie/Evo_frame.jpg
http://img.photobucket.com/albums/v85/ibewgypsie/Bender-INdexer.jpg

I had a factory one, I sold it to pay child support. I used a old indexer off the mill to spin the index angles.

I posted the center marks on the bender frame
www.metalillness.com (http://www.metalillness.com) Somewhere. I don't remember which topic.. Kinda got my mind on a software problem here.. (single track mind)

Where you at? what all you gotta bend? If you want to take a ride I can start you up and leave you alone with mine.

David

spkrman15
02-27-2006, 01:14 PM
David those are some realy nice bends! Great machine.

Rob http://bbs.homeshopmachinist.net//smile.gif

BobWarfield
02-27-2006, 03:58 PM
David, how can we find out more about the CNC portion of your bender?

Best,

BW

Dawai
02-27-2006, 04:16 PM
Bob.. Where you at? stop by..
I am in partners with a good ole boy Canadian. I'll ask him if he minds giving up the design. He was talking about building them up there. SO I have to respect his wishes.

I have been working on one that will do french curves. No more details than that, except it has only gotten drawed and redrawed about ten times. I don't have room. My linear positioner and indexer is built on the Ibeam in the ceiling. I was planning on running the wheels off this one. So far my health has not let me.

Powering one with a cylinder is easy. The simplest way to do it is with a index ring and a stop limit switch. NO electronics, computer, expensive plc needed. You just turn the valve off with the interlocked limit. A foot switch interlocks, as long as you step on the pedal, the limit is NOT made, it cycles the valve. Another foot pedal is needed if you have a two way cylinder.

My suggestion for everyone wanting to clone this? OKAY, Multi-purpose. BUY some quick connects for the pump and use the same one on a press, a bender, a shear, a punch, a angle shear, a break.. a a a a a.... OK? the expensive part is the pump and valves.. you put a quick connect on the cylinders ports and you can go on to other jobs with the big investment. If I had any sense I would have built the bender on my existing ironworker. Just modified the controls.

OF course I didn't do that. Hindsight.

Wanna buy mine? I'll do it on the next one.I got a lil over two grand in it. I can build the next one for about half that, plus the shoes at $200 each.


ON a press? mount the rotating center axle of the shoe on the bottom part, a lever going to the shoe binding holes to rotate it as the press ram descends.
You can buy a few good shoes from vansant or another supplier. Bending pipe by hand sucks. Last time I bent some .25 wall 1" I was slipping in the sweat puddles on the floor. THAT SUCKS. I love buttons and computers much more.

[This message has been edited by David E Cofer (edited 02-27-2006).]

BobWarfield
02-27-2006, 07:43 PM
Thanks for the info, David. I'm in California, which is presumably not a quick stop by.

You should suggest your Canadian friend sell the plans if he is not yet ready to manufacture something. Or, perhaps just a PC Board and instructions ala the Shumatech DRO. Presumably this is just a PIC controller-type application and doesn't take too much electronics to create anyway. Something simple in the way of an encoder and a PIC controller with membrane keyboard ought to be able to act as that stop limit switch at arbitrary degree angles. A hundred bucks or so worth of electronics or less I would guess?

I like your quick disconnect idea. What capacity pump did you use?

Best,

BW