What Is The Working Principle Of Hydraulic Press Brake?

A hydraulic press brake is a pressing machine that has the ability to generate a compressive force using a hydraulic cylinder. It uses a hydraulic lever instead of a mechanical lever. It is used to compress different materials such as chemicals, plastics, concrete and metal.

A hydraulic press brake generates pressure using a hydraulic pump. The generated pressure pushes two opposing surfaces towards each other – hence the name hydraulic press. The pressure generated by a hydraulic press brake surpasses the pressure generated by electric and pneumatic surfaces. The hydraulic machine can either be single-acting or double-acting. This is determined by the direction the pressure is applied. Some of the major users of hydraulic press brakes are the metal and plastic processing industries.

The Working Principle Of Hydraulic Press

The functionality of a hydraulic press brake machine follows pascal’s law principle. Pascal’s law articulates that the pressure applied on an enclosed fluid in a container is equally transmitted and unreduced to all the container parts. The pressure act at a right angle to enclosed walls. The generated mechanical power is transmitted to the entire hydraulic press. It applies modest force amounts using smaller pistons and more power is exerted by the larger pistons.

After understanding Pascal’s law used in the hydraulic press, now let us understand the working principle of the hydraulic press.

A hydraulic press brake functions by applying the generated pressure difference between two pistons. This enhances the production of a comprehensive force of a magnitude that’s greater than force generated by mechanical means. For instance, a simple hydraulic press brake has two pistons. They both are connected by a tube that’s filled with fluid. When the hydraulic press brake operator presses one of the pistons upwards, the fluid in the cylinder pushes through the pump to the second piston. This creates a downward force equally on both pistons. This creates pressure an all-around pressure on the material between the pistons.

Types Of Hydraulic Press Brakes

There are different types of hydraulic press brakes with slightly different features and abilities. They include

The H Frame Hydraulic Press Brake – Its name comes from the shape formed by its different parts; a steel frame, a pump, a press cylinder and a movable bolster. It’s a large mechanical device whose application range from production and assembly lines as well as repair and maintenance.

The C Frame Hydraulic Press Brake – The C frame can either be a single column – the C frame or a double frame – the D frame. They occupy a limited space and are outstanding in accuracy. It also has an exceptional rigidity, pace and principle arrangement. It can be operated either manually or by semi-automatic machines making them suitable for different industries.

The Four-Column hydraulic press Brake –The four-column hydraulic press brake obtains its name from its four-column cylinders from an integrated cartilage unit assembly. At the end of the horizontal frame structure are vertically installed piston rods connecting each hydraulic pump. It is ideal for building, metallurgical, chemical, oil and gas industries.

The Horizontal Hydraulic Press Brake – The horizontal hydraulic press brake comes with unique hydraulic systems that protect them from overloading. They also come with a prototype – a two-side plan. They have the ability to run at high speeds for a short time and then lower the speed to run for a longer time. The main purpose of the horizontal hydraulic is to shape workpieces that are shorter or longer than the vertical press.

The Application Of Hydraulic Press

Having discussed the working principle of a hydraulic press, now we see the different applications of the hydraulic press. They include,

  1. The high pressure generated by the hydraulic press brake creates enough energy to perform tasks such as forging, metalworking, welding, making appliances ad compacting consumables such as foods. This makes it ideal for the aerospace and automotive industries.
  2. Hydraulic press brakes are cost-effective and robust ways to apply pressure on objects. This makes the hydraulic press brake suitable for commercial and industrial purposes since it can handle huge pressure volumes. It can also be used for research and instruction purposes in an academic setting.
  3. The pressure generated by the hydraulic press brake is ideal for heavy-duty tasks such as bending large-diameter tubes and extruding PVC pipes forming and stamping metal sheets. This makes it ideal for the fabrication of food cans, truck beds and siding of house roofs.

In Summary

The working principle of a hydraulic press brake makes it ideal for the manufacturing industry to perform many different tasks such as stamping, forming, bending and pressing metal products. It also makes it a valuable tool for manufacturing and workshops due to its ability for shaping plastics and metal. Other takes include punch, shear, and bending tasks. 

Interesting Related Article: “Hydraulic Pump Buying Guide: How Do I Choose A Hydraulic Power Pack?