hydraulic press brake bending machine

A press brake can be described by basic parameters, such as the press brake force or press brake tonnage and the press brake working length. Additional parameters include the press brake amplitude or press brake stroke, the distance between the press brake frame uprights or side housings, distance to the backgauge, and press brake work height. The press brake upper beam usually operates at a speed ranging from 1 to 15 mm/sec.

There are several types of press brakes as described by the means of applying force: mechanical press brake, pneumatic press brake, hydraulic press brake, and servo-electric press brake.

In a mechanical press brake, energy is added to a flywheel with an electric motor. A clutch engages the flywheel to power a crank mechanism that moves the ram vertically. Accuracy and speed are two advantages of the mechanical press brake.

Hydraulic press brakes operate by means of two synchronized hydraulic cylinders on the C-frames moving the upper beam. Servo-electric press brakes use a servo-motor to drive a ballscrew or belt drive to exert tonnage on the ram.

Pneumatic press brakes utilize air pressure to develop tonnage on the ram.

Until the 1950s, mechanical press brakes dominated the world market. The advent of better hydraulic press brakes and computer control press brakes have led to hydraulic press brake machines being the most popular.

Pneumatic and servo-electric press brake machines are typically used in lower tonnage applications. Hydraulic press brakes produce accurate high quality products are reliable, use little energy and are safer because, unlike flywheel-driven press brakes, the motion of the ram can be easily stopped at any time in response to a safety device i.e. a light curtain.


Recent improvements are mainly in the control and a device called a backgauge. A back gauge is a device that can be used to accurately position a piece of metal so that the press brake puts the bend in the correct place. Furthermore the backgauge of press brake can be programmed to move between bends to repeatedly make complex parts. Early press brakes relied on the tooling to determine the bend angle of the bend.

Press brakes often include multi-axis computer-controlled backgauges. Optical sensors allow operators to make adjustments during the bending process. These sensors send real-time data about the bending angle in the bend cycle to machine controls that adjust process parameters.


The Besco hydraulic press brake machine with hydraulic up-driving system can be run stably. The hydraulic press brake machine with nominal force less than 1000kN and worktable length less than 3200mm adopts double cylinders. Both mechanical stop of the hydraulic press brake controlling the stroke of sliding block and the back gauge can be adjusted manually and with digital read-out device.

The hydraulci press brake machine with nominal force more than 1000kN and worktable length more than 3200mm adopts three cylinders. Both mechanical stop of the hydraulic press brake controlling the stroke of sliding block and the back gauge can be adjusted mechanically with digital read-device and also can be micro-adjusted by hand.

This hydraulic press brake to ensure the bending precision of workpiece, there is bevel joint type precision-regulating machanism on the upper die sets.


1. The frame of hydraulic plate press brake bending machine is entirely welded with steel plates and treated to relive stress by tempering, so the percision is well maintained.

2. Hydraulic plate press brake bending machine uses hydraulic top-drive, stepless pressure adjustment and high quality sealing rings imported from overseas to ensure the machine tools reliability.

3. Hydraulic plate press brake bending machine uses mechanical synchronous meahanism and the complex compensation are designed so as to raise the workpieces precision. (the convex structure for the table above 160T)

4. The stroke and distance of the backgauge of hydraulic plate press brake bending machine is adjusted by the motor and is well adjusted by hand, the adjustment is displayed by digital meters.

5. hHydraulic plate press brake bending machine uses Inch, single, continuous operation mode being designed for the machine and reversing and maintain time can be controlled by the time relays.

6. Hydraulic plate press brake bending machine uses X-axis and Y-axis adopt digital display with resolution of 0.01mm, which can achieve automatic positioning high control precision