Introduction(alloy steel vs stainless steel Nathaniel)
- source:MAJA CNC Machining
What are Rivets?
A rivet is a permanent mechanical fastener that consists of a smooth cylindrical shaft with a head on one end. The rivet is inserted through pre-drilled holes in two or more layers of material that are to be joined. The protruding end is then upset, or bucked, to form a second head, clamping the layers together.
Rivets come in a variety of head shapes, shaft diameters, and materials. Common head shapes include round, flat countersunk, and brazier or universal. Shaft diameters range from 1/16 to 3/8 inch for common rivets. Popular materials include aluminum, steel, copper, stainless steel, and Monel.
Key Properties and Benefits
Rivets offer unique benefits that make them indispensable for many CNC applications:
- Permanent joining - Unlike screws or bolts, rivets cannot loosen or vibrate free over time once installed. This makes them ideal for components that experience vibration or shock loads.
- High strength - Well-designed rivet joints can approach the tensile strength of the parent material. The compressive forces of the bucked rivet heads provide excellent resistance to shear forces.
- Lightweight - Aluminum and Monel rivets add little weight but supply sufficient strength for many aerospace, automotive, and consumer product uses.
- Easy inspection - Installed rivets are easily visually inspected to verify proper installation and joint integrity.
- Cost-effectiveness - Automated riveting technology allows very high production rates at low unit cost.
Uses of Rivets in CNC Machining
Rivets have numerous important applications in CNC machining operations:
Rivets are the preferred fastener for joining aluminum structural components on airframes. CNC-operated rivet installation tools insert rivets into prepunched holes and upset the tails to lock components together. Hundreds of thousands of rivets may be used on large aircraft.
Sheet Metal Fabrication
In sheet metal products produced with CNC brakes, presses, and shears, rivets provide versatile fastening for assemblies. This includes electronic enclosures, truck bodies, trailer frames, and many more. Automated riveting systems set rivets around the perimeter of the product for fast, consistent production.
Many household appliances utilize rivets to assemble cases and frames from steel, stainless, and aluminum sheet metal. CNC machining centers pre-drill sheet metal components to accept rivets installed by automated or manual systems.
Rivets see widespread usage in automotive manufacturing. Applications include chassis components, drivetrain brackets, interior trim, seats, and door hardware. Robotic CNC manufacturing cells often handle automated riveting for high-volume production.
Durable consumer goods like bicycles, furniture, storage containers, and recreational products all use rivets for economical permanent fastening. CNC routers pre-drill rivet holes in panels and frames, while manual, pneumatic, or electric tools install the rivets.
Repair and Maintenance
For equipment repair involving metal components, technicians often rely on rivets for fast repairs of cracked or damaged parts. Hand-held manual, pneumatic, or electric rivet tools set rivets quickly to restore products to working order.
Rivets deliver unique benefits like shear strength, vibration resistance, and inspection visibility that make them highly useful for CNC machining applications. From automated high-volume production to field repair work, rivets provide a cost-effective permanent fastening solution. Continued innovation in automated riveting technology will further expand the capabilities and applications of rivets in manufacturing. CNC Milling CNC Machining