Hydraulic presses are the devices that use hydraulic cylinders to produce a compressive force. They use the hydraulic equivalent of a mechanical lever, and was also known as a Bramah press after the inventor, Joseph Bramah, of England. He invented the hydraulic press and was also issued a patent on this press in 1795.
The hydraulic press functions based on Pascal’s principle, i.e. the pressure throughout a closed system is constant. One part of the system is a piston acting as a pump, with a modest mechanical force acting on a small cross-sectional area; the other part is a piston with a larger area which generates a correspondingly large mechanical force. Only small-diameter tubing (which more easily resists pressure) is needed if the pump is separated from the press cylinder.
Hydraulic presses and machines are often used for clinching, forging, punching, molding, metal forming, deep drawing and blanking operations.
In the hydraulic machines category, the broaching machines are known for their accuracy and superior finish.
Broaching is a highly innovative metal cutting process, wherein the metal is detached by successive actions of the cutting teeth number incorporated in tool called Broach.
Broaching machine manufacturers provide good returns in terms of productivity and quality. Productivity expansion may take place at the rate of ten times more if broaching is used as a procedure. This is due to the fact that the rate of metal removing is much greater if broaching is used.