Structural Analysis of Helical Compression Spring

Abstract

The die set system used in the wire straightening and cutting system is comprises of die plate, bolster plate and guides with mutually helped by helical compression spring. This spring plays an important role in smooth movement of the die set by supplying energy stored in it as well as keeps sufficient pressure on the plate provided at the bottom of the rod. It acts as suspension system to absorb the shocks and stores the mechanical energy. It is made up of elastic materials such that it can twist, pulled or stretched by the application of force and regain its original shape when the force is released due to this the stress are produced along the length of the helical compression coil spring. On account of these stresses coil springs have been undergone the failure prematurely before its service life. The present work is investigation on reduction of the premature failure and improves the service life of helical compression spring. The life of spring is improved by optimum design and analysis by variation of wire diameter. Results indicate that the maximum shear stresses are decreased for increase values of wire diameter and number of turns of coil spring. Due to this, deflection of spring as required is achieved hence reduction of the premature failure of coil spring is attained.