Know About Rivet

An overview of rivet

The Cedar Creek Bridge near Haynes, North Dakota is a Pratt through truss structure that was built in 1908. It was listed on the National Register of Historic Places (NRHP) in 1997.

It is a rigid-connected (riveted) Pratt through truss. It was one of many North Dakota bridges listed on the National Register as part of a Multiple Property Submission. The bridge is located 6 miles (9.7km) north and 11 miles (18km) east of Haynes. It brings a county section road across Cedar Creek.

According to its NRHP nomination, "The bridge is significant ... for its association with an important pattern of bridge construction in a number of counties in the state, in which one or two bridge companies received most of the contracts over a successive period of years, even with, or under the pretense of, competitive bidding. This pattern emerged in the late nineteenth century and, in some counties, continued into the 1930s. This bridge serves as a representative example of the pattern; it is one of the two oldest documented bridges in Adams County constructed by a long-term county bridge builder, the Twin City Bridge Company."

Know About Rivet 1

what kind of hammer is used for riveting?

A Hammer isn't used for riveting. You use a rivet gun, which is sort of like a pliers that you squeeze. The rivet tool itself actually supports the rivet, in that the rivet is held in place by the tool. You then stick the rivet into the hole and squeeze the handle of the rivet gun (assuming you're using a manual rivet gun and not a pneumatic rivet gun). Once it's squeezed, the rivet expands in the hole. That's the basic cheap and dirty explanation.

OK, I guess you could use a ball peen hammer if you had to. My bad.

Do blind rivets come with nails???

Blind rivets, also known as "pop rivets", are tubular and are supplied with a mandrel through the center. The rivet assembly is inserted into a hole drilled through the parts to be joined and a specially designed tool used to draw the mandrel into the rivet. This expands the blind end of the rivet and then the mandrel snaps off. Blind rivets are often avoided for critical structural joints because they generally have less load carrying capability than solid rivets. Furthermore, because of the mandrel they are more prone to failure from corrosion and vibration. A blind rivet consists of the rivet body and the setting device or the mandrel (sometimes called the nail or stem).

Prior to the adoption of blind rivets, installation of a solid rivet typically required two assemblers: one person with a rivet hammer on one side and a second person with a bucking bar on the other side. Seeking an alternative, inventors such as Carl Cherry and Lou Huck experimented with other techniques for expanding solid rivets. Unlike solid rivets, blind rivets can be inserted and fully installed in a joint from only one side of a part or structure, "blind" to the opposite side.

Due to this feature, blind rivets are mainly used when access to the joint is only available from one side. The rivet is placed in a pre-drilled hole and is set by pulling the mandrel head into the rivet body, expanding the rivet body and causing it to flare against the reverse side. As the head of the mandrel reaches the face of the blind side material, the pulling force is resisted, and at a predetermined force, the mandrel will snap at the break point of the mandrel. A tight joint formed by the rivet body remains, the head of the mandrel remains encapsulated at the blind side, although variations of this are available, and the mandrel stem is ejected.

The rivet body is normally manufactured from one of three methods:

Wire, the most common method

Tube, common in longer lengths, not normally as strong as wire

Sheet, least popular and generally the weakest option.

There is a vast array of specialty blind rivets that are suited for high strength or plastic applications. Typical types include:

- TriFold, a rivet that splits into three equal legs like a molybolt. Typically used in soft plastics where a wide footprint is needed at the rear surface. Used in automotive interiors and vinyl fences.

- Structural Rivet(a), an "external" mechanically locked structural blind rivet that is used where a watertight, vibration resistant is of importance. Typically used in manfacture or repair of truck bodies. A special nose piece is required to apply this rivet.

- Structural Rivet(b), an "internal" mechanically locked structural blind rivet that is used where a watertight, vibration resistant is of importance. Typically used in manfacture or repair of truck bodies.

The typical assembly process requires the operator to install the rivet in the nose of the tool by hand then actuate the tool, however, in recent years automated riveting systems have become a popular in an effort to reduce assembly costs and repetitive disorders. The cost of such tools range from $1,500 for autofeed pneumatics to $50,000 for fully robotic systems.

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