MACHINE DESIGN

MACHINE DESIGNWith the water interruptions prevailing in your town, you have been asked to design an upright cylindrical water tank 6 meter in diameter and 6 meter high, vented, and to be filled completely with water. Determine the minimum thickness of the tank plate if the stress is limited to 40Mpa.

4.4 mmA helical-coil spring has a mean coil diameter of 1 inch and a wire diameter of 1/8 inch. Determine the curve correction factor of the spring.

1.1144

A a vise is equipped with a 1-inch single square thread, with 4 thread per inch. The frictional radius of the collar is 0.5-inch. The coefficient of friction for both the collar and threads is 0.20. How much external torque must be applied to produce a force of 200-lb against the jaws of the vise?

37.93 in-lb

A helical-coil spring has a mean coil diameter of 1-inch and a wire diameter of 1/8-inch. Determine the value of bergstrassar factor of the spring.

1.172Compute the speed of the gear mounted on a 52.5 mm diameter shaft receiving power from a driving motor with 250 Hp.

2265rpm

A uniform beam is 12 meters long is fixed at one end. It has a uniform weight of 50 Kg/m along its length. A load of 20 Kgs is suspended on the beam 4 meters from the free end. The moment of the fixed end is

3760 Kg-m

A 20 straight tooth bevel pinion having 14 teeth and a diametral pitch of 6 teeth/inch drives 32 tooth gear. The two shaft are at right angles and in the same plane. The pinion is to transmit 1800rpm and transmitting 50 Hp. Determine the pitch diameter of the gears.

2.33 inches and 5.33 inches

A 1-inch diameter shaft has a single disc weighing 75-lb mounted midway between two bearing 20 apart. Find the lowest critical speed in rpm. Neglect the weight of the shaft. Assume the modulus of elasticity is 30 x 10psi.

2038rpm W=sqrt(g/y)y=PL^3/48EI