25-06-2012, 12:56 PM
Spring design
MD-8 Spring design.pdf (Size: 410.65 KB / Downloads: 237)
Introduction
Springs give a relatively large elastic
deflection.
Application of springs
Control of motion in machines
Reduction of transmitted forces as a result of
impact or shock loading
Storage of energy
Measurement of force
Helical Compression springs
Made from round wire and wrapped in
cylindrical form with a fixed pitch
Plain end
Least expensive
Tends to bow sideways under load
Plain and ground end
Better mating conditions being flat
Likely to get entangled in storage
Squared end
Squared and ground end
Spring index
Low indices result in difficulty with spring
manufacture and in stress concentrations
induced by curvature.
Springs in the range 5 ≤ C ≤ 12 are preferred,
while indices less than 3 are generally
impractical.
Conclusions
Springs produce a large deflection and used for a
number of applications.
Most springs are made of steel.
Stress and deflection in coil springs was derived.
Springs can be connected in series and parallel.
There are a number of other spring configurations
used in engineering.