Types of Springs

SPRINGS
DEFINITION FOR SPRING:

Springs are elastic bodies (generally metal) that can be twisted, pulled, or stretched by some force. They can return to their original shape when the force is released. In other words it is also termed as a resilient member.

CLASSIFICATION OF SPRINGS:

Based on the shape behavior obtained by some applied force, springs are classified into the following ways:

SPRINGS





HELICAL SPRINGS LEAF SPRINGS





SPIRAL SPRINGS

TORSION SPRING

TENSION HELICAL

SPRING COMPRESSION HELICAL

SPRING



I. HELICAL SPRINGS:

      DEFINITON:

      It is made of wire coiled in the form of helix.

      CROSS-SECTION:

      Circular, square or rectangular

      CLASSIFICATION:

      1) Open coil springs (or) Compression helical springs

      2) Closed coil springs (or) Tension helical springs

1) HELICAL TENSION SPRINGS:

      CHARACTERISTICS:

        • Figure1 shows a helical tension spring. It has some means of transferring the load from the support to the body by means of some arrangement.

        • It stretches apart to create load.

        • The gap between the successive coils is small.

        • The wire is coiled in a sequence that the turn is at right angles to the axis of the spring.

        • The spring is loaded along the axis.

        • By applying load the spring elongates in action as it mainly depends upon the end hooks as shown in figure2.

                            FIGURE1.TENSION HELICAL SPRING

          [pic]







          FIGURE2.TYPES OF END HOOKS OF A HELICAL EXTENSION SPRING

          [pic]

          [pic]

APPLICATIONS:

              1) Garage door assemblies

              2) Vise-grip pilers

              3) carburetors

2) HELICAL COMPRESSION SPRINGS:

      CHARACTERISTICS:

        • The gap between the successive coils is larger.

        • It is made of round wire and wrapped in cylindrical shape with a constant pitch between the coils.

        • By applying the load...