If the distance between the inside edge of the flanges is
kept equal to the gauge distance, the flange of the wheel would rub against the
inside face of the rail. to prevent the distance between the inside edge of the
flange is kept less than the gauge distance.
if the rim of the wheels rests flat on the rails, there
would be lateral movement of the axle resulting in damage to inside edge of the
rails. this is prevented by sloping the wheels at a slope of 1 in 20. the foot
of the rail resting on the sleepers is also tilted to a slope of 1 in 20. this
sloping of wheel from the vertical axis is known as CONING OF WHEELS.
one of the undesired
effects of Coning of wheels is that the pressure of the wheel is always
towards the inner edge of the rail which tends to wear out quickly. to reduce
this wear of the rail, the rails are also placed at an inward slope of 1 in 20.
the cutting of the sleepers to provide tilting of the rails
is known as Adzing..
Advantages:
1) Tilting of the
rails results in uniform wear of the
head of the rail.
2) proper gauge is
maintained
3) life of sleeper
and rail is increased
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