hydraulic presses


I saw videos about Hydraulic presses pressing 100s of tons,how is that possible, not like how that’s achieved but how doesn’t everything under the press is destroyed?

In: 4

Hydraulic presses apply that super-high force in a very small area and in a very controlled space/fashion. The die can only move so far due to the internal structure of the pistons, so it can’t go down farther than surface of the press. The surface of the press is generally made of very sturdy, durable material that is bolted to the floor (and to the pistons), so that it won’t move or be damaged when the object/workpiece is being pressed.

The hydraulic press generates those forces between two points. Everything above or bellow that is not taking any of the load of the press. Think of it as a machine which squeeze things. The fact that most hydraulic presses are vertical is just not important, they could just as well be mounted horizontally. A hydraulic press which can press 100s of tons needs to be built to handle these forces of course. This is why hydraulic presses tends to be made out of thick solid metal beams. And steel is strong enough to take all that force in tension. But you can use a hydraulic press on top of a milk cart if it can handle the weight of the press itself as no forces go further down then the bed of the press.

[This](https://en.wikipedia.org/wiki/Heavy_Press_Program#/media/File:Mesta_press_east_side.jpg) is a 50,000 ton press. It’s on a lot of concrete. It also goes through to the basement where it’s on more concrete (with a lot of these big presses, a good chunk of them is actually in the basement). Concrete is good at holding up heavy things. However, use over 50 years resulted in cracks in the basement concrete. That cost about $100 million to repair, and now they figure it’s good for another 50 years.