Types of rivets

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Types of rivets
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Cold Rivets can be used to permanently join
plates together. Steel rivets are used for
joining steel plates whilst aluminium rivets are
used for aluminium plates. Rivets are available
made from other materials such as copper and
brass. The material of the rivet normally matches
the material to be riveted together. In the case
of perspex, aluminium or copper rivets are the
most suitable because they are relatively soft
and easy to shape.
1. Rivets are made from either aluminium, steel,
copper or brass. They are supplied in different
lengths and diameters and must be cut to the
exact length using a junior hacksaw.
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2. The head of the rivet is set to rest in the
'dome' of a dolly. A typical 'dolly' is shown
on the left. This tool is held in an engineers
vice and it supports the rivets head.
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3. The plates are placed over the rivet, resting
on the top surface of the dolly.
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4. The plates are pushed over the rivet and in
order to ensure that there are no gaps between
them a rivet set is pushed pushed down, over the
rivet's shaft. The rivet's shaft fits inside a
small hole at the base of the rivet set. The
rivet set is made from hardened steel as it is
tapped at the top with a ball pein hammer. This
closes any gap between the two plates.
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A ball pein hammer is used to tap the plates
together. If this is not done, the plates may be
move slightly, even after a series of rivets have
been hammered in position.
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5. The ball pein hammer is reversed and used to
expand the tail of the rivet. This may take
several slight taps. At this point the rivet
cannot be removed from the plates.
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6. The ball pein side of the hammer is used to
form the rivet head. This takes time and should
not be rushed. The head should form a dome.
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7. The final shaping of the rivet head is formed
using the rivet snap. The plate should be
permanently fixed together at this stage.
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Over 3Million rivets were used in the
construction of The Titanic
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SNAP RIVETS
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Snap rivet tool
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Snap rivet joint in folded metal
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LEVI's THE ORIGINAL JEANS!  Jacob Davis was a
tailor who frequently purchased bolts of cloth
from Levi Strauss Co.'s wholesale house. After
one of Davis' costumers kept purchasing cloth to
reinforce torn pants, he had an idea to use
copper rivets to reinforce the points of strain,
such as on the pocket corners and at the base of
the button fly. Davis did not have the required
money to purchase a patent, so he wrote to Levi
suggesting that they both go into business
together. After Levi accepted Jacobs' offer, on
May 20, 1873, the two men received patent
139,121 from the United States Patent and
Trademark Office. The patented rivet was later
incorporated into the company's jean design and
advertisements. Contrary to an advertising
campaign suggesting that Levi Strauss sold his
first jeans to gold miners during the California
Gold Rush (which peaked in 1849), the
manufacturing of denim overalls only began in the
1870s . (Wikipedia)
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