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Aluminum Chips press?

Pretty cool. What is the price range for a monster like that? Matt got a link for the that one for more info? What are you going to do for a safety curtain?

I see it's electric and hydraulic. I don't understand hydraulics very well. Nobody ever makes things that push hard with screws and gears other than arbor presses which are on the low strength scale. So why are hydraulics the way to go? I have a half finished 20 ton press for my spouse and her jewelry projects based on a published design. It uses a 20 bottle jack and monstrous ready rod. I'll have to post some pictures.
 
You can make a press that uses screws and gears and will push hard, however they generally need a lot of room to work levers, etc, fiction starts to work in to the effert put in to what work comes out. On the really big jobs, the people doing the work need to be fed, and there is always a few pushing the wrong way!
 
Janger said:
I don't understand hydraulics very well.
Click to expand...

Hydraulic pressure is a universal way to achieve extremely high forces. It's all about psi - (pounds per square inch).

Most oil pressure systems and pumps generate pressure around 3000 psi. The hoses and systems are capable of more as a safety factor.

3000psi acting on one side of a piston with a diameter of 6 inches is 3000 x pie r ^2 = 85,000 pounds of force. Even a very small pump can generate 3000 psi.

Think of it like leverage where the leverage is the area of the pump piston applied to the area of the work piston.

Of course, the bigger the work piston, the longer it takes to move it a given distance.

That's why you can jack up your car with one finger using a hydraulic bottle jack.

Does that answer your question?
 
Janger said:
Pretty cool. What is the price range for a monster like that? Matt got a link for the that one for more info? What are you going to do for a safety curtain?

I see it's electric and hydraulic. I don't understand hydraulics very well. Nobody ever makes things that push hard with screws and gears other than arbor presses which are on the low strength scale. So why are hydraulics the way to go? I have a half finished 20 ton press for my spouse and her jewelry projects based on a published design. It uses a 20 bottle jack and monstrous ready rod. I'll have to post some pictures.
Click to expand...
Electric is the pump. instead of hand or air over. Air over is deafening, both air over and hand are slow. Electric is the cats meow.
 
I am finally getting the die and punch ready .. real work does put a hold on things at times.

I have a question if anyone knows. My die is made of DOM tubing at 2.490 DIA ID. How much clearance should the punch have? I currently have it a 4.485 (.005 less) I think the clearance should be small to prevent any chips from climbing up the sides. see pic.. I am on the lathe now,,,
 

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Matt-Aburg said:
DOM tubing at 2.490 DIA ID. How much clearance should the punch have? I currently have it a 4.485 (.005 less)
Click to expand...
Guessing that is a typo - that the tubing ID is actually 4.490 not 2.490.
That's kinda obvious but that is not my question / concern.

In your photo, the die (green tubing) appears to be fairly thin wall tubing. I would suggest using a much heavier walled pipe not tubing (schedule 40 or even schedule 80 pipe). The lateral loads on the die will be very high and could split the tubing. Also - before splitting the 0.005 gap will substantially increase and could result in the ram getting very tightly stuck in the die. Even if it does not split, when the ram pressure is removed the die tubing will shrink back to original ID and tighten onto any chips that may have found their way into the gap.
 
Maybe I'm off in the bush here, but when I melt something, I find that as long as I have a melt puddle in the crucible, adding small bits to the pot means the little chips are swallowed and added to the melt in seconds. Sometimes I use a cutting torch to assist the melt to make a puddle.
After all is liquid pour on flux and stir.
 
CWret said:
Guessing that is a typo - that the tubing ID is actually 4.490 not 2.490.
That's kinda obvious but that is not my question / concern.

In your photo, the die (green tubing) appears to be fairly thin wall tubing. I would suggest using a much heavier walled pipe not tubing (schedule 40 or even schedule 80 pipe). The lateral loads on the die will be very high and could split the tubing. Also - before splitting the 0.005 gap will substantially increase and could result in the ram getting very tightly stuck in the die. Even if it does not split, when the ram pressure is removed the die tubing will shrink back to original ID and tighten onto any chips that may have found their way into the gap.
Click to expand...
This tubing is 2.49 ID. It is called DOM, Draw over Mandrel. The wall is thicker than schedule 80, and is 0.250. The OD is 3.00. I made a ring that's 4.00 OD x 3.00 ID and 1.0 thick as a flange and welded onto the pipe. This is for 2 reasons, one that The bore on the press is 3.125, and second that in case I get stuck with chips going up the sides, I can clamp it and reverse the press. I will photo this soon as I just bored the ring last night, and the welder is out. The punch is turned to 2.485 and has M16 threaded rod to attach to the RAM.. Also the press is 50 Tons.. electric.
 
Ironman said:
Maybe I'm off in the bush here, but when I melt something, I find that as long as I have a melt puddle in the crucible, adding small bits to the pot means the little chips are swallowed and added to the melt in seconds. Sometimes I use a cutting torch to assist the melt to make a puddle.
After all is liquid pour on flux and stir.
Click to expand...
What is your flux? I saw on YouTube, people using salt.
 
Matt-Aburg said:
The wall is thicker than schedule 80, and is 0.250. The OD is 3.00.
Click to expand...
Thank you for that explanation. The photo was very misleading. You have lateral forces well under controlled. Good.
(& yes i should’ve clued in to the DOM)
 
Aluminum chips make me think of rocket fuel…

Mix a few other chemicals in before pressing and you’ll be good for July 1st next year…

(This is a joke of course, but it was the first thing that came into my mischievous mind)
 
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