A Brief History Of Hydraulic Presses

In 1795, J. Bramer of Britain applied Pascal's principle to invent the hydraulic press, which was used for packaging, pressing vegetable oil, etc. By the mid-19th century, Britain began to use hydraulic presses for forging, and hydraulic presses gradually replaced super-large steam forging hammers. By the end of the 19th century, the United States had manufactured a 126,000-kN free-forging hydraulic press. Since then, more than 20 100,000-kN free-forging hydraulic presses have been manufactured in the world, of which two were manufactured in China (see color picture). With the emergence and improvement of electric high-pressure pumps, forging hydraulic presses have also developed in the direction of smaller tonnage. After the 1950s, small-scale rapid forging hydraulic presses appeared, which can perform work equivalent to that of 30-50 kN forging hammers. In the 1940s, Germany manufactured a giant die-forging hydraulic press of 180,000 kN. Since then, 18 die-forging hydraulic presses of more than 180,000 kN have been manufactured in the world, of which one manufactured in China is 300,000 kN.