Short notes on Mechanical Power Brakes

A Mechanical press brake, also known as a brake press, is a machine tool for bending sheet and plate material, most commonly sheet metal.It forms predetermined bends by clamping the work piece between a matching punch and die.

Bending process

Typically, two C-frames form the sides of the press brake, connected to a table at the bottom and on a movable beam at the top. The bottom tool is mounted on the table with the top tool mounted on the upper beam

Types

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

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

In a mechanical press, 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.

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

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