Help building forge press

[Blackcherryforge]

Help building forge press

i’m trying to start building a forge press I have access to a hydraulic set up minus a ram I’ll attach pictures of the motor pump and the whole unit below my question is is this set up adequate for a forge press and if so what size cylinder would I be able to run or am I better off to just start from scratch? The hydraulic set up is off of a trash compactor

[BIGGUNDOCTOR]

It is all about matching the components for the task at hand.  You need to look at pump capacity (you have 6.5 GPM available), pressure available, speed of travel needed, and cylinder internal capacities/pressure output.

If you are putting out 6.5 GPM on a large diameter cylinder you will get high output pressure and low travel speed. With a smaller cylinder you will lose pressure, but gain speed.  Retracting speed will be faster due to lower internal volume due to the rod taking up space. 

So, you will need to get some math going, and need to find out what pressure the pump puts out. Our compactor dumpster tops out at 1,000 psi.

Pressure

flow rates at different pressures

surface area of cylinder piston

internal volume of cylinder

 

Effective use of pressure will also vary with die design.  1,000 psi on a 4"x2" face will be less than with a 4"x 1/2" face, and far less than with a 1"x1" face.

[Irondragon Forge ClayWorks]

If you put your location in your profile, you never know, there may be members versed in hydraulics close enough to visit and lend a hand.

[Frosty]

Welcome aboard, glad to have you. If you put your general location in the header you'll have a much better chance of meeting up with members living within visiting distance. Also a lot of questions have answers that are strongly regional such as tool availability and price or potential markets and selling prices.

Biggun laid out the basics of what you need to know to establish what kind forging press you can build from the pump. Being 3 phase would put it right off my radar but that's my shop. Of course I could be misreading the plaque. 

The level math you need to use isn't much more than basic arithmetic, a LITTLE geometry is about as hard as it gets, area and volume, EZ PZ.

Everything hydraulic is based on 3 things. Pressure, volume and area. PSI x Area = work force. How hard the ram can push.

Volume per second / cylinder volume = ram speed.

That's it, all three and how they interact. 

The only thing I'd like to know in advance is it's max psi rating and I don't see that on the plaque. 

Frosty The Lucky.

[Steve Sells]

and depending on where in the world he is located, he may or may not have the correct power for this, so add in the cost of transformers and phase converters, which can cost more than just getting a new motor

[Frosty]

I thought of that too Steve but can't read the HZ on the plaque. I assumed that being available meant it was local to him and so running a generally compatible power. Changing voltage is just a matter of wiring the connection in the motor, the diagrams are on the plaque.

There are a couple of us here with hydraulics experience but we need more info to make meaningful suggestions or answer questions.

Frosty The Lucky.

 

[TimBeek]

That is a 60hz, 3 phase motor. It will need to be ran on true 3 phase power or a rotory phase converter. I static phase converter will not work with the high starting load of a hydraulic pump.

[gewoon ik]

and on 60Hz; on 50Hz, the engine will run slower so your pumpcapacity will be lower

[bubba682]

I got to say i'm not a fan of frankinsteining hydraulics for presses unless ya got a good background in hydraulics,electrical and welding for safety,cost and performance concerns.That bein said if ya nail it there a great tool to have just don't go down the rabbit hole spending good money after bad.Speed of the ram is key imo when building a press...