Introduction(engineering fillet Judy)
- source:CLAREY CNC Machining
Rivets have been used since ancient times to fasten armor plates, build ships and bridges, and assemble early aircraft. Today, rivets continue to be ubiquitous in many industries due to their reliability, cost-effectiveness, and ease of installation compared to other fasteners like nuts and bolts.
In this article, we will examine the many uses and applications of rivets in modern manufacturing, construction, and engineering. We will also overview the different types and materials of rivets available.
Uses in Manufacturing
Rivets are extensively used in the manufacturing industry to assemble and fasten metal components and parts. Here are some of the main uses:
- Aircraft and aerospace - Rivets are used throughout airframes to fasten skins, stringers, bulkheads, wings, empennage, and other structural components. Aircraft rivets are lightweight and extremely reliable.
- Automotive - Cars, trucks, and other vehicles use thousands of rivets in the body panels, frames, chassis, interior components, and more. Rivets provide durable fastening without nuts/bolts.
- Appliances - Washing machines, dryers, refrigerators, etc. all rely on rivets to assemble the external housing and internal parts like drums, valves, and panels. The vibration resistance of rivets is advantageous.
- Electronics - Computers, mobile devices, and other electronics utilize rivets to fasten internal framework and external casings. Their electrical/thermal conductivity is also useful.
- Shipping containers - Intermodal shipping containers are assembled with rivets at the corners and seams to create durable, weatherproof enclosures capable of stacking.
- Railway and mass transit - Rivets help assemble railroad tracks, subway/metro cars, and more. Their stiffness and reliability under shear loads is preferred.
Construction and Infrastructure Uses
Beyond manufacturing, rivets also serve key functions in construction and infrastructure:
- Bridges - Structural steel truss bridges and girder bridges depend on rivets to join beams, braces, gussets, and columns. Rivets can safely carry tensile, compressive, and shear loads.
- Buildings - Steel frame buildings, transmission towers, industrial structures, and construction equipment utilize rivet fastening for structural assembly.
- Pipelines - Underground water/oil/gas pipelines rely on riveted joints to create leakproof seals and withstand immense pressure.
- Ships - Marine rivets fasten hull plates, bulkheads, frames, and other components on ships, tankers, and barges operating on the seas.
- Cranes - Tower cranes, jib cranes, and other heavy machinery are fabricated with rivets due to their vibration resistance.
- Railways - Rivets assemble railroad tracks, railcars, locomotives, and heavy rail machinery that operates outdoors.
- Trusses - Prefabricated steel trusses for roofs, towers, and long-span structures depend on rivets for strength.
Types of Rivets
There are various types of rivets designed for different applications:
- Solid/Blind Rivets - Tubular rivets with no hollow center. Used for fastening thin materials. Easy to install blindly (one-sided).
- Semi-tubular Rivets - Partial hollow center. Provide good compromise between strength and weight savings.
- Tubular Rivets - Completely hollow center. Very lightweight while still strong. Ideal for aircraft.
- Drive Rivets - Hammered into place on one side. Deformed head created on other side. Common general-purpose rivets.
- Structural Rivets - Extra large rivets designed for demanding structural connections. Very high strength.
- Self-piercing Rivets - Cut through and clinch material when driven in. No pre-drilled hole needed.
- Screw Rivets - Threaded shank. Driven in like a screw then head formed. Easily removed.
- Blind Bolted Rivets - Installed using a threaded nut/collar from the blind side. High strength.
- Expanding Rivets - Bulge outward Electronically injected. Provide very tight fit.
The material used for rivets also varies based on the demands of the application:
- Aluminum - Aircraft and aerospace rivets are typically aluminum. Lightweight, with good shear/tensile strength.
- Steel - Most common material for industrial rivets. Strong yet inexpensive. Various alloys optimized for strength.
- Stainless Steel - Excellent corrosion resistance. Used for extremely demanding environments.
- Copper - High electrical/thermal conductivity makes it ideal for electronics riveting. Also easily machined.
- Titanium - Extremely strong but lightweight. Used in critical aviation applications despite higher costs.
- Monel - Corrosion-resistant nickel alloy used for marine and chemical environments.
In summary, rivets provide a simple, economical, and reliable fastening solution for countless manufacturing and construction applications. Their versatility, strength, and ease of installation has maintained their prevalence in engineering for centuries. While new high-tech fasteners emerge, the humble rivet continues to play an indispensable role across industries. Understanding the different types and materials of rivets available allows engineers to select the optimal variant for their specific needs. CNC Milling