Semitubular Rivets: The semitubular rivet (fig. These rivets are used commercially in soft materials and where a good appearance is required on both sides of the part. 39) consists of two parts that have an interference fit when driven together. Some specific types of tubular rivets areĬompression Tubular Rivets: A compression tubular rivet (fig. They are normally used for commercial applications rather than in the aerospace industry. Since extensive cold forming is required on these rivets, they must be extremely ductile and are consequently made of low strength materials. The hollow end is cold formed to a field head. The generic form has a manufactured head on one side and a hollow end that sticks through the pieces being joined. Tubular Rivets: Tubular rivets are partially hollow and come in a variety of configurations. They are used primarily for commercial sheet metal applications. Although drive-pin rivets can be installed quickly, they are usually not used in aerospace applications. The head is normally hexagonal to prevent rotation of the tubular body while the mandrel is being torqued and broken off.ĭrive-Pin Rivets: This rivet has a drive pin that spreads the far side of the rivet to form a head, as shown in figure 38. 37(a)) has a threaded internal mandrel (stem) with the external portion machined flat on two sides for the tool to grip and rotate. Threaded-Stem Rivets: The threaded-stem rivet (fig. A generic pull-mandrel rivet is shown in figure 36. When the proper load is reached, the mandrel breaks at the notch. Pull-Mandrel Rivets: This rivet is installed with a tool that applies force to the rivet head while pulling a prenotched serrated mandrel through to expand the far side of the tubular rivet. Less training is required for the operator.īlind rivets are classified according to the methods used to install them:.Clamping force is more uniform than with solid rivets.Installation time is faster than with solid rivets.A given-length rivet can be used for a range of material thicknesses.They can be used where only one side of the workpiece is accessible.The installation tool is portable (comparable to an electric drill in size).Only one operator is required for installation.They have the following significant advantages over solid rivets: 35), to increase the shear and fatigue strength while still maintaining a flush fit.īlind Rivets: Blind rivets get their name from the fact that they can be completely installed from one side. The sharp edge of the countersunk head is also removed in some cases, as in the Briles BRFZ “fast” rivet (fig. Note also that the countersunk head angle can vary from 60° to 120° although 82° and 100° are the common angles. However, because the “experts” do not necessarily agree on the names, other names have been added to the figure. Although most of the solid rivets listed in table IX have universal heads, there are other common head types, as shown in figure 34. Note that the rivets in table IX are covered by military standard specifications, which are readily available. Some other solid rivet materials are brass, SAE 1006 to SAE 1035, 11 steels, A286 stainless steel, and titanium. A representative listing of solid rivets is given in table IX (ref. Thus, solid rivets must have cold-forming capability without cracking. Solid Rivets: Most solid rivets are made of aluminum so that the shop head can be cold formed by bucking it with a pneumatic hammer. From a structural design aspect the most important rivets are the solid and blind rivets. Typically, the processes is used for joining plastic or sheet metal.The general types of rivets are solid, blind, tubular, and metal piercing (including split rivets). They are used to make high strength joints in a range of materials, including metals, plastics, wood and leather. Once gripped, the mandrel snaps, permanently holding the rivet in place. A pop rivet gun is placed on the rivet, pulling the mandrel into the rivet body, causing it to expand and grip the parts to be joined. A pop rivet is then inserted through the drilled hole and the rivet body is brought into contact with the parts. In situations where access to both sides of a component is limited, a hole is first drilled through the parts to be joined. The first part is called the rivet body (also known as the shell or hat) and the second part is called the mandrel (also known as the stem). Click here to see our latest technical engineering podcasts on YouTube. They are used in applications where there is limited - or no - access to the rear side (blind side) of the parts to be joined. Pop rivets, also known as blind rivets, are a type of rivet. National Structural Integrity Research Centre. Structural Integrity Research Foundation.
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