EFFECT OF PITCH ANGLE ON STATIC CHARACTERISTICS OF A HELICAL MACHINED SPRING

Abstract

This paper investigates the linear static and modal analysis of helical machined springs theoretically and numerically using the finite element method with the aid of SolidWorks software. A rectangular cross sectional area of a helical spring was studied with different pitch angle, it was found that increasing the pitch angle increases the spring deflection and decreases both the maximum shear stress and the fundamental natural frequency. Two cases were studied for machined spring, one with different pitch angle and the other with different number of spring starts. The machined helical spring showed better results for maximum shear stress and deflection compared with the conventional helical one. With multiple starts machined helical spring, the spring performance can be improved for a great extent. The results showed that SolidWorks software can be used effectively in modeling and analyzing machined spring.