1. GOVERNMENT ENGINEERING COLLAGE,PATAN
DEPARTMENT OF MECHANICAL ENGINEERING

2. SUB – DESIGN OF MACHINE ELEMENTS
SEM - 5
SUB – DESIGN OF MACHINE ELEMENTS
TOPIC –function of springs and types of springs
Prepared By-
JAVDIMOHAMADHASAN I.
PARMAR HARDIK K.

3. SPRINGS Functions of springs :
Spring is define as an elastic or resilient body, whose function is to deflect or deform when load is applied and recover its original shape when load is removed.
Functions of springs :
To apply a force, e.g springs in clutches,brakes,spring loaded valves,etc.
To measure a force ,e.g spring balance
To store an energy,e.g springs in clocks,toys etc.
To absorb shocks and vibratons, e.g springs in vehicle suspension systems.

4. Types of springs 1.Helical compression and tension springs
2.Conical and Volute Springs
3.Torsion Springs
4.Disc or Belleville Springs
5.Leaf or Laminated Springs

5. 1.Helical compression and tension springs
Helical springs are made of wire wound in the form of helix. The cross section of wire will be circular, square, or rectangular depending upon the type of load and deflection requirement.

6. 2.Conical and Volute Springs
Conical Spring
Volute Spring
Conical and Volute springs ,shown in fig are used in special applications where a telescopic spring action is required or a spring with spring stiffness that increase with load is desired.

7. In such Springs,as the load increses the number of active coils gradually decreases.The decreasing number of coils results in an increasing spring stifness.
3.Torsion Springs

8. The spiral springs are used in mechanical watches and clocks
Torsion Spring are of helical or spiral type,as shown in fig these springs are used to apply the small torque
The helical torsion springs are used in door-hinges and automobile starters
The spiral springs are used in mechanical watches and clocks

9. 4.Disc or Belleville Springs
Disc or Belleville springs, shown in fig are used where high spring stiffness is required
These springs are made up of number of conical discs held together by central bolt or a pipe passing through disc hole

10. 5.Leaf or Laminated Springs
Leaf spring consists of a number of leaves held together by means of clamps and bolts ,as shown in fig.
It is commonly used in automobile suspension system.

11. Thank You……..