Specify rivets
The common types of rivets and state their uses
Rivets are cylindercal rods having heads of various shapes. Theys are used for assembling the parts of a workpiece together.
Specification of a rivet
The rivet is specified by the shape of the head diameter, and the length.
Shape of head
The shape of the rivet head is to be selected according to the intended use of the workpiece to be riveted.
Diameter
The diameter is to be selected depending on the required strength
Length
Length is to be selected depending upon the thickness of the components to be riveted
Types and uses
Snap head
It is the most commonly used form, and it gives a very strong joint.
Pan head
It is used where strength is the only consideration such as heavy structural work
.
Conical head
It is generally used in light assembly where riveting is done by hand hammering.
Countersunk head
It is used where projection of the rivet head is to be avoided.
Bifurcated rivet
The shape of the head is shown in the figure and the bifurcated portion is used for fastening light parts tin plates, leather, plastics etc.
HAND RIVETING TOOLS
The following are the tools generally used in hand riveting
Rivet set
It is used for bringing the plates closely together after inserting the rivet in the hole.
Dolly
It is used to support the head of the rivet which is already formed and also to prevent damage to the shape of the rivet head.
Rivet snap
It is used to form the final shape of the rivet during riveting. Rivet snaps are available to match the different shapes of rivet heads.
Drift
It used to align the holes set to be riveted
Caulking tool
It is used for closing down the edges of the plates and heads of the rivets to form a metal joint.
Fullering tool
It is used for pressing the surface of the edge of the plate. Fullering hepls to make fluid tight joints..
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