What Is A Hydraulic Press Machine?

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Publish Date: August 22, 2022

Hydraulic press machine is widely used in the industrial field, which can quickly and effectively carry out heavy processing tasks.

By applying a small force to the hydraulic press machine, the closed liquid of the hydraulic cylinder generates a large compression force.

The hydraulic press machine was invented by Joseph Brama in 1795.

The hydraulic press machine uses a hydraulic lever instead of a mechanical lever.

Its die space, stroke length, and applied pressure can be adjusted.

The hydraulic press machine can be used to process metal, plastic, wood, rubber, and other materials.

Its processes include metal forming, molding, bending, forging, sheet drawing, cold extrusion, straightening, flanging, stamping, and powder metallurgy.

The hydraulic press machine can be used for manufacturing electrical appliances, automobile parts, rails, knives, and aircraft manufacturing.

This blog will give you a detailed introduction to the definition, history, components, types, working principles, and applications of the hydraulic press machine.

What Is A Hydraulic Press Machine?

The hydraulic press machine is mainly composed of the frame, base, power system, and control system.

The hydraulic press machine is mainly used for metal forming, straightening, and crushing.

The hydraulic press machine is mainly driven by the hydraulic cylinder, and the hydraulic system is designed according to Pascal's law.

In a hydraulic press machine, the piston exerts pressure on the liquid.

The piston is equivalent to a pump that can generate mechanical force.

When the pressure acts on the confined liquid, the external static pressure is uniformly transmitted to all directions of the liquid.

The pressure at any point in the fluid is equal in all directions so that the metal can be formed by static pressure.

Therefore, the hydraulic press machine provides uniform and smooth force to the ram when the ram moves

The hydraulic press machine can complete large-scale processing tasks and metal forming, and its tonnage can be as high as 10000 tons.

Presses are commonly used to press materials together or in separate facilities.

Other shaft assembly metal parts, or be used to bend and straighten materials.

History of Hydraulic Press Machine

Historic hydraulic Press. Woodcut engraving, published in 1876.

Hydraulic technology has a history of thousands of years, which is about fluid flow and control technology.

It was not until the 18th century that the Englishman Joseph Brahma invented the hydraulic press.

He invented the hydraulic press machine according to Pascal's principle.

At the same time, he also invented the toilet which is very convenient for our life.

At that time, the force of the hydraulic press machine to press objects was generated by a basic hydraulic cylinder.

The hydraulic press machine used today has been upgraded and widely used in industry, agriculture and other fields.

The hydraulic press machine suitable for different processes, materials and scenarios can be selected for you.

Main Parts of Hydraulic Press Machine

The frame, working table and ram constitute the basic frame of the hydraulic press machine.

Hydraulic cylinder is the power source of hydraulic press machine, mainly composed of the piston rod, ram.

The hydraulic cylinder can convert the fluid power of the hydraulic system into kinetic energy to drive the ram.

The oil is stored in the oil tank and connected to the piston rod of the hydraulic cylinder through pipes.

When the hydraulic oil is transmitted to the piston rod, the hydraulic cylinder will generate pressure to drive the ram to process the material.

The hydraulic press machine uses the motor to drive the oil pump to convert the mechanical force into pressure.

The limit switch can adjust the height and thickness of the material being processed.

It also controls the pressure applied to the workpiece by maintaining a predetermined gap between the platens.

The relief valve of the hydraulic press machine can release the excess pressure of the pressed metal plate.

The manual control valve can adjust the pressure exerted by the slider on the workpiece.

The electrical box controls the switches and joysticks of the machine through wiring and circuit connections.

How Does A Hydraulic Press Machine Works?

The working principle of the hydraulic press machine is based on the Pascal principle.

The hydraulic system of the hydraulic press machine includes the hydraulic cylinder, piston and hydraulic pipe.

The hydraulic system generally has two hydraulic cylinders, which are filled with hydraulic oil.

Hydraulic oil is usually filled into smaller servo cylinders.

Pressure is generated when the piston is connected to the servo cylinder.

So that the hydraulic oil enters the larger hydraulic cylinder through the hydraulic pipe.

The pressure applied to the larger cylinder and piston pushes the hydraulic oil back to the servo cylinder.

The force applied by the servo-hydraulic cylinder to the hydraulic oil causes the master cylinder to bear a large force.

The hydraulic system and the ram press, bend and form the materials together.

Although there are many kinds of hydraulic press machines, their working principles are basically the same.

The hydraulic pump provides power for the hydraulic press machine.

The power and pressure of the hydraulic press can be controlled by changing the type of the pump.

Pumps can be manual, pneumatic and electric, and electric and pneumatic pumps can generate more uniform force.

When the pump starts working, the hydraulic oil will be pumped into the hydraulic system and then pressurized.

After the hydraulic oil enters the piston, it will generate huge pressure, driving the ram and punch to exert force on the workpiece.

The hydraulic press machine can produce huge energy with a small force.


The hydraulic press machine is widely used in the manufacturing industry together with a press brake, laser cutting machine and other machines.

Understanding the working principle and types of hydraulic press machines can help you choose the right machine.

If you have any questions, please contact us for more detailed machine information.


What is an H frame hydraulic press machine?

H frame hydraulic press has an H frame, equipped with the pressure cylinder, pump and movable support.

H frame hydraulic press machine is equipped with a manual pump, which is generally used for small batch production.

What is a C-frame hydraulic press machine?

Its frame is C-type, with better speed, accuracy and guidance performance.

The C-frame is more portable and is used for fixing and assembling parts, disassembling components, or bearing installation.

What is four column hydraulic press machine?

The four-column hydraulic press is equipped with two hydraulic cylinders and a central control system.

The pressure and compression speed are adjustable, and there is a semi-automatic circulation function.

The blanking pressure and working pressure can also be adjusted.

The four-column hydraulic press can exert a very large force on the workpiece.

What is a roll-frame hydraulic press machine?

This hydraulic press can install bearings, gears and pulleys on axles and rollers.

It can also be used for bearing calibration and pressing of shaft parts.

What is a straightening hydraulic press machine?

This hydraulic press is used for straightening straight shafts, plates, and large weldments.

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