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


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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..