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### Hydraulic press

1. Presentation Topic Hydraulic Press Presented To Engr. Umar Khalidoon Presented By Muhammd Hasnain 2016-BT-Mech-714 Umar Farooq 2016-BT-Mech-726 M.N.S U.E.T Multan
2. Hydraulic Press • The hydraulic jack/Press is a device used for lifting heavy loads by the application of much smaller force. • It is based on Pascal’s law, which states that intensity of pressure is transmitted equally in all directions through a mass of fluid at rest.
3. History of Hydraulic Press • It was actually invented by Joseph Bramah, so is also known as the Bramah Press.
4. Working Principle • The working principle of a hydraulic jack/Press explained. • Consider a ram and plunger, operating in two cylinders of different diameters, which are interconnected at the bottom, through a chamber, which is filled with some liquid.
5. Working
6. Working • Let • W= Weight to be lifted, • F = Force applied on the plunger, • A = Area of ram, and • a = Area of plunger.
7. Working • Pressure intensity produced by the force F, p = F/Area of plunger = F/a • As per Pascal’s law, the above intensity p will be equally transmitted in all directions. • Therefore, The pressure intensity on ram = p = F/a = W/A or W= F(A/a)
8. Working • Equation indicates that by applying a small force F on the plunger, a large force W may be developed by the ram. • Mechanical advantage of press = A/a • If the force in the plunger is applied by a lever which has a mechanical advantage (L/l) then total mechanical advantage of machine = (L/l)(A/a) • The ratio (L/l) is known as leverage of press
9. Numerical Portion Solved By UMAR FAROOQ 2016-BT-MECH-726 Example#39.1 Example#39.2
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