JHCC

"Inverted press" modification?

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The industrial surplus warehouse near me has a couple of hydraulic presses listed under the name of "inverted press". They look like they have fairly complete hydraulic systems with pumps, controls, etc all complete, and for the price (about $150) look like they might be a reasonably affordable entry point into hydraulic pressing. It looks like they push/pull a shaft up through a hole in the center of their top, but I have no idea how this was used originally or for what.

I won't post the commercial links here, but here are a couple of images:

invpress1.jpg

invpress4.jpg

 

invpress2.jpg

invpress3.jpg

My thought is either to flip one of these upside down (invert the inverted, as it were), or to cannibalize the cylinder and the works and make up a new frame to hold them in a more conventional arrangement. Any thoughts about what I should be thinking or looking for? Or indeed, running away screaming?

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I've thought about those too John and think they'd be good if for nothing else than experimenting. I've always wondered how a horizontal forge press would work in a practical sense. I wish I lived close enough to go on a walking tour, the guys taking pics aren't interested in what I want to see.

Frosty The Lucky.

 

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Those are typically used for pulling bushings into bores. Part on table, run ram up thru hole and bushing, split ring driver and keeper on top of bushing and pull it home. Much safer since stuff cant fly with a rod thru the hole. I've designed a few over the years.

 

Brian

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I suspected it was for something like that.  In other words, when the press is under load, the connection between the top and the frame is under compression. So, even if the mechanics are good, there’s a decent chance that I’d have to make up a new frame that would be strong enough to withstand the tensile forces that might tear it apart. 

Or make some kind of setup that goes on top of this, to pull the top die down from below, rather than pushing it down from above. 

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How fast and how powerful?

As for horizontal presses; a bunch of them have been made from log splitters; Horizontal presses are often referred to as "bulldozer" presses.

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12 minutes ago, ThomasPowers said:

How fast and how powerful?

No clue, other than to note that the gray one has a 1hp 115v motor, and the blue one has a 1.5hp 115/230v motor. (They're both also single phase, which works with my wiring.) Can't see the cylinder sizes in the pictures.

brianc, any thoughts on typical sizes/speeds/powers for these beasties?

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It looks like they have a 4 ton multi press for the same cost (actually $160), although it's 3 phase I would think that would be a better option for you. With either a phase converter or a new motor it would still be pretty cheap.

A "pull" type press would take a lot of work to make useful. You could do some calculation based on motor size and guessing on cylinder size. I would guess they are in the 1-2 ton range?

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How well do "bulldozer" forging presses work? You see used log splitters for pretty reasonable up here and heck a new one is a couple few grand.

Frosty The Lucky.

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bulldozer press site:iforgeiron.com  had 16 hits; might "hit" one of them up to see.

I think a lot of it would be what you plan to use it for.

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But if I look it up myself, it'll be a setback for my efforts to modernize my research techniques. <sigh>

I'll have to look deeper but not seeing anything about converting log splitters but I've only spend an hour or so and have to do dog stuff.

Frosty The Lucky.

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So you are saying you own your own dog; but do your own barking?

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On 3/21/2019 at 11:13 AM, Fowllife said:

It looks like they have a 4 ton multi press for the same cost (actually $160), although it's 3 phase I would think that would be a better option for you. With either a phase converter or a new motor it would still be pretty cheap.

Knowing how things work at this place, $160 for a Denison Multipress means there's something significantly wrong with it. Presses of that size routinely go for $900 or more.

On the other hand, this 110-ton beastie is on sale for a mere $31,999!

image.thumb.png.f289b4a4d3e8c4e6a9cfa3a6805c59ac.png

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Posted (edited)
On 3/20/2019 at 7:07 PM, Frosty said:

I've thought about those too John and think they'd be good if for nothing else than experimenting. I've always wondered how a horizontal forge press would work in a practical sense. I wish I lived close enough to go on a walking tour, the guys taking pics aren't interested in what I want to see.

Frosty The Lucky.

 

Horizontal forge press? This one works for me so far:

2019-03-31 16.54.44.jpg

2019-01-09 16.11.14.jpg

Edited by kerryd
another pic

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On ‎3‎/‎23‎/‎2019 at 9:23 PM, JHCC said:

On the other hand, this 110-ton beastie is on sale for a mere $31,999!

You would probably be pressed to get a good forging speed out of that.

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Update: the first of those forges sold fairly quickly, but the second stuck around long enough to get marked down below $50. I've been in touch with the seller, and I'm picking it up tomorrow. I will probably start a new thread about its modification, which I will link here once that project is underway.

As Frosty said to me in a PM discussion, "It'd be worth it just for the motor and pump. A slow hyd forge press will still do an amazing amount of work." I'm hoping he's right.

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I've acquired the press and started a new thread about its modification:

 

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