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OCTOBER 19-20, 2012 - YMCA University of Science & Technology

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Proceedings <strong>of</strong> the National Conference on<br />

Trends and Advances in Mechanical Engineering,<br />

<strong>YMCA</strong> <strong>University</strong> <strong>of</strong> <strong>Science</strong> & <strong>Technology</strong>, Faridabad, Haryana, Oct <strong>19</strong>-<strong>20</strong>, <strong>20</strong>12<br />

FIG. 10 LOAD vs DEFLECTION GRAPH<br />

The parameters <strong>of</strong> the spring can be varied individually and a detailed study can be made on this phenomenon.<br />

The result will be an improvement in the spring design process where theoretical values will be closer to the actual<br />

values depending on the spring working conditions. The parameters that should be varied for a better understanding<br />

<strong>of</strong> this phenomenon are:<br />

1. Material <strong>of</strong> the spring<br />

2. Wire diameter<br />

3. Spring diameter<br />

4. Number <strong>of</strong> active turns<br />

5. Spring end type<br />

The scope <strong>of</strong> future work would be:<br />

1. Arriving at a formula for the uncoiling <strong>of</strong> the helical spring<br />

2. Determining whether a bearing should be used for a particular spring application<br />

3. Determination <strong>of</strong> exact stress values and load values based on restricted or unrestricted uncoiling <strong>of</strong> the<br />

spring<br />

4. Determination <strong>of</strong> torsional stresses on the support structure<br />

TABLE 2. SHOWING EXPERIMENTAL RESULTS FOR ALL 5 SPRINGS<br />

SL<br />

NO.<br />

SPRING<br />

NAME<br />

1 SPRING-1<br />

2 SPRING-2<br />

3 SPRING-3<br />

4 SPRING-4<br />

5 SPRING-5<br />

SPRING<br />

TYPE<br />

STRAIGHT<br />

HELICAL<br />

STRAIGHT<br />

HELICAL<br />

(MULTI<br />

RATE)<br />

STRAIGHT<br />

HELICAL<br />

DOUBLE PIG<br />

TAIL<br />

DOUBLE PIG<br />

TAIL<br />

MANUFAC-<br />

TURING<br />

PROCESS<br />

COLD<br />

COILED<br />

COLD<br />

COILED<br />

HOT COILED<br />

COLD<br />

COILED<br />

HOT COILED<br />

APPLICATION<br />

REAR SUSPEN-<br />

SION<br />

FRONT SUS-<br />

PENSION<br />

FRONT SUS-<br />

PENSION<br />

FRONT SUS-<br />

PENSION<br />

REAR SUSPEN-<br />

SION<br />

UNCOIL-<br />

ING RE-<br />

STRICTED<br />

MAX<br />

LOAD (N)<br />

UNCOIL<br />

COIL-<br />

ING<br />

TURN (˚)<br />

UNCOILING<br />

UNRE-<br />

STRICTED<br />

MAX LOAD<br />

(N)<br />

%<br />

DIFFE-<br />

FE-<br />

RENC<br />

E<br />

4540 15.5 4130 9.0308<br />

2486 11 2362 4.9879<br />

4510 14.5 4155 7.87<br />

6035 14.5 5525 8.4507<br />

5455 11.5 5135 5.8662<br />

ACKNOWLEDGEMENT<br />

The authors wish to thank Mr. J. SharanaBasavaraja (Senior Lecturer, Dept <strong>of</strong> Mechanical Engineering,<br />

B.M.S.C.E.),<br />

Mr. Deepak Hiremath (R&D Dept, Stumpp, Schuele and SomappaPvt Ltd.) & Mr. Prakash (Wave Axis Pvt.<br />

Ltd.). Without their guidance and support, the research would not have been possible.<br />

3<strong>20</strong>

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