ANALYSIS OF HOLLOW COIL HELICAL EXTENSION SPRING AND THE STUDY OF OPTIMIZING THE WEIGHT

This paper shows the study which deals with the weight reduction for tensile extension spring by changing the solid spring to hollow one. The springs which are generally used are in solid form due to which the weight of entire body in which the spring is attached gets increased. The forces which can be act on spring may be linear push or linear pull or radial type. This spring deflect by pulling and regain its shape when pulling is neglect. The weight of tensile spring is reduced by changing crossection of tensile spring from solid to hollow crossection and keeping all the other parameters same. For this research, Modeling of hollow and solid tensile spring has been done with the help of CREO2.0. The analytical part of hollow and solid coil spring has been done on HYPERMESH 13. We conclude the results for two different material viz. SS 304 and ASTM A231and found that the percentage of change in the stresses while comparing the solid spring to the hollow spring for both materials are acceptable. So it is possible to use hollow extension spring in place of solid one, which reduce the weight of the spring and also by which we can reduce the material usage required for manufacturing the spring and the overall cost as well