Hydraulic Press

A hydraulic press is used for lifting or compressing large items. Hydraulic mechanism is used to generate the force which increase the power of a standard mechanical level. Hydraulic presses are widely used in a manufacturing environment. A large lifting or compressive force is applied using hydraulic press for a specific purpose. Today, in the highly technically advanced world, hydraulic presses are the most widely-used, demanded and efficient modern press, used in various industrial applications. There are different hydraulic press machines, ranging from small table top units to huge machines used to create metal sheets and parts. Hydraulic press is available in a wide variety of sizes and styles and in capacities ranging from small hydraulic press of 1 ton or less to large machines of 10,000 tons or more. Manual hydraulic press, automotive hydraulic press are popular hydraulic press designs available in the market.

Hydraulic Press Machine Mechanism

The primary idea used to provide power to the hydraulic press is that pressure level in a closed system is constant. Hydraulic press operates using two pistons , having fluids inside that are displaced by the pistons' inward movement. In a hydraulic press, there is a large force exerted on the larger piston of the two pistons found in a hydraulically coupled cylinders. It is to be noted that a relatively small force is applied on the smaller piston to get the large force in the larger piston. By moving the piston outward , the fluid forces its way back into the space. The additional power is created through the fluid movement, which is confined to the system.

Selection Tip of Hydraulic Press

When selecting a hydraulic press, it is necessary to find out the amount of force that is generated depending on the size of the pistons, both in terms of piston head diameter and distance of movement. The amount of fluid moved by the piston is proportional to the piston head areas' ratio. This means a small piston would have to move a large distance to create enough force to move the large piston any distance. To calculate the distance the large piston will move, divide the ratio of the piston head area by the distance the small piston is moved.

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Applications of Hydraulic Press

The hydraulic presses have exclusive applications in the following spheres:

1. Deep drawing operations
2. Blanking and Punching
3. Lift Jacks
4. Riveting, Stamping and Pressing
5. Powder Compacting
6. Metal Forming Presses
7. Earth Moving Machines
8. Other applications like: FRP, SMC, DMC, Rubber Plastics etc.

Uses Of A Hydraulic Press

In almost all industrial purposes, hydraulic presses are used. The main purpose of hydraulic press is for transforming metallic objects into sheets of metal. Some of the uses of hydraulic presses are as follows:

1. They are used for the thinning of glass
2. They are used for making powders in case of the cosmetic industry.
3. In medical industry, they are used for making tablets.
4. A hydraulic press is the heart of any car crushing system.
5. It is used in squeezing out chocolate liquor while processing the cocoa beans, which forms fat-free cocoa powder.
6. A hydraulic press is used in the process of making swordsets.

Salient Features of Hydraulic Presses:

1. These presses provide fast approach slow pressing & fast return speeds.
2. The frames are designed to be stress-relieved.
3. Maximum frame rigidity is achieved through computer aided frame design & finite element analysis.
4. Extra long, precision machined & hardened guides to face slides; offer exceptional accuracy & alignment which further reduced to wear.
5. In blanking or punching hydraulic presses, a damping system can be fitted. This effectively reduces breakthrough noise & tool wear normally generated by such operations.
6. "Programmable logical controls" (PLC) is provided in most hydraulic presses.
7. Ram slides / guides/ guide bushes are lubricated from a centralised lubrication arrangement.
8. Usually, the hydraulic press has a fabricated, heavy duty, tested welded plate construction for highest stiffness under heavy loads. The whole platen is stress-relieved after welding.


Important Sites
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