INSTRUCTIONAL AIMS:
This information sheet is mainly explain about the major type of rivet, the head design, the material and size of aircraft rivet. It also explain on how to determine the length of a rivet for installation in order to strengthen the student knowledges and skills in performing aircraft riveting work.
INFORMATION:
A rivet is a metal pin used to hold two or more metal sheets, plates or pieces of material together. A head is formed on one end when the rivet is manufactured. The shank of rivet is placed through matched holes in two pieces of material and the tip is then upset to form a second head to clamp the two pieces securely together. The second head is formed either by hand or by pneumatic equipment which is called a shop head.
The shop head functions in the same manner as a nut on a bolt. In addition to their use for joining aircraft skin sections, rivets are also used for joining spar sections, for holding rib sections in place, for securing fittings to various parts of the aircraft and for fastening innumerable bracing members and other parts together.
1. Two major types of rivet
There are two types of rivets used in the aircraft are the common solid shank type, which must be driven using a bucking bar and the special blind rivets, which may be installed where it is impossible to use a bucking bar.
Solid shank rivet
Solid shank rivets are generally used in repair work. They are identified by the kind of material of which they are made, their head type, size of shank and their temper condition.
Blind rivet
For use in such palces, special rivets have been designed which can be bucked from the front. They are sometimes ligther tahn solid shank rivets, yet amply trong for their intended use. These rivets are produced by several manufactured and have unique characteristics that require special installation tools, special installation procedures and special removal procedures. That is why they are called special rivets. Because these rivets are often inserted in the location where one head (usually the shop head) cannot be seen , they are also called blind rivets.
There are many palces on the aircraft where access to both sides of a riveted structure or structural part is impossible or where limited space will not permit the use of bucking bar. Also, in attachment of many non-structural parts such as aircraft interior furnishing, flooring, deicing boots and the like, the full strength of sloid shank rivets is not neccessary.
Blind rivet
For use in such places, special rivets have been designed which can be bucked from the front. They are sometimes lighter than solid shank rivets, yet amply strong for their intended use. These rivets are produced by several manufactured and have unique characteristics that require special installation tools, special installation procedures and special removal procedures. That is why they are called special rivets. Because these rivets are often inserted in the location where one head (usually the shop head) cannot be seen , they are also called blind rivets.
There are many places on the aircraft where access to both sides of a riveted structure or structural part is impossible or where limited space will not permit the use of bucking bar. Also, in attachment of many non-structural parts such as aircraft interior furnishing, flooring, deicing boots and the like, the full strength of solid shank rivets is not necessary.
Figure.2: Blind rivet
2. Identify the head design types and materials of rivet
The designation of solid shank rivet head type, such as universal head, roundhead, flathead, countersunk head and brazier head depends on the cross sectional shape of the head.
Universal Head Rivets
Universal head rivets are similar to brazier head rivets. They should be used in place of all other protruding-head rivets when existing stocks are depleted.
