Bucking bar:What¡¯s rivets/riveting for an aircraft?
Rivet in the Longman dictionary definites: ¡° A metal pin used for fastening metal plates together by putting it through a hole in the plates and then hammering one end flat,so that it spreads and holds firmly.
As we all know,rivets play a significant role in meatl industry, especially in the air-inducstry,such as aircraft, military machines and so on.Therefore, knowing and getting familiar to the components and the applications of rivets becomes important for everyone. In particular,people work for the country or military should know every compoents of rivets about their military machines.
The followings are all about the konwledge of rivets,including its components, types, applications and so on.
A rivet is a permanent mechanical fastener. Before it is installed it consists of a smooth cylindrical shaft with a head on one end. The end opposite the head is called the buck-tail. On installation the rivet is placed in a pre-drilled hole. Then the tail is "upset" (i.e. deformed) so that it expands to about 1.5 times the original shaft diameter and holds the rivet in place. To distinguish between the two ends of the rivet, the original head is called the factory head and the deformed end is called the shop head or buck-tail.
Because there is effectively a head on each end of an installed rivet it can support tension loads (loads parallel to the axis of the shaft); however, it is much more capable of supporting shear loads (loads perpendicular to the axis of the shaft). Bolts and screws are better suited for tension applications.
Fastenings used in traditional wooden boat building like copper nails and clinch bolts work on the principle of the rivet but they were in use long before the term rivet was invented and, where they are remembered, are usually classified among the nails and bolts respectively.
COLLETED BY HANNS FROM www.chinatungsten.com
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