Hydraulic press

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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