A Clutch is a mechanism
for transmitting rotation, which can be engaged and disengaged. Clutches are
useful in devices that have two rotating shafts. In these devices, one shaft is
typically driven by a motor or pulley, and the other shaft drives another
device. In a drill for instance, one shaft is driven by a motor and the other
drives a drill chuck. The clutch connects the two shafts so that they can
either be locked together and spin at the same speed (engaged), or be decoupled
and spin at different speeds (disengaged).
There are many different
vehicle cultch designs but most are based on one or more friction
discs, pressed tightly together or against a fly wheel using springs.
discs, pressed tightly together or against a fly wheel using springs.
Clutches found in heavy
duty applications such as trucks and competition cars use ceramic clutches that
have a greatly increased friction coefficient, however these have a “grabby”
action and are unsuitable for road cars.
The raw material
required for the manufacture of clutch and parts are steels, graphite,
phenolic resin and asbestos fiber.
The manufacturing process
of clutches and its parts comprises mixing graphite and phenolic resin to form
a graphite mixture. Then soaking an asbestos fiber string with in graphite
mixture will follow. Removing the soaked string such that phenolic resin
content of between 14-24 weight percents and graphite content of between 1-8
weight percent for every 100 weight percent is produced. Then bonding the
string to the clutch facing so that the Rockwell hardness of the clutch facing is
20 - 60 on the Moh scale.
Clutch Mechanism Video
The linings and the steel are
then cut to the required size and punched. Then using the trimming machine,
trimmed the edges to ensure exact alignment with the shoe and the brake drum.
The clutches are then
drilled and riveted, and bonded to the prepared brake shoes. The production
process has no any adverse environmental impact.