Introduction(the difference between cast iron and steel Salome)
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What are Rivets?
A rivet is a mechanical fastener that consists of two main parts - a smooth cylindrical shaft and a head. To secure materials together, the rivet is inserted into pre-drilled holes through the materials' overlap. The protruding end is then mechanically deformed, spreading out the shaft to form a second head which locks the rivet in place by clamping the materials together.
Rivets are commonly used to join and assemble sheet metal components in applications such as aircraft fuselages, bridges, ships, railcars and more. They provide a strong, reliable mechanical attachment even when vibration, stress and movement are present. Rivets are also lightweight and low-cost.
CNC Rivet Manufacturing
Traditionally, rivets were produced manually using basic machining and heading equipment. However with CNC technology, rivet manufacturing has become highly automated and efficient.
CNC machining utilizes computerized controls to operate lathes, mills, drills and other tools. This enables fast, precision metal-cutting to shape rivet blanks accurately and consistently. CNC heading machines then form the rivet heads through cold forging techniques.
Key parameters such as shaft diameter, head shape, length and finishing can all be controlled via CNC programming. Multiple tools can be integrated on CNC centers to produce complete rivets in a streamlined work flow. This reduces production time and cost compared to manual methods.
Tight tolerances of +/- 0.005 inches or less can be held on CNC rivet dimensions. Quality standards such as ASME and ISO can also be adhered to. Automated in-process inspection checks ensure specifications are continually met.
Lead times can be reduced with flexible CNC production. Rivet requirements can be adjusted through software rather than mechanical changeovers. Small batches can be run cost-effectively.
Uses of CNC Rivets
Rivets made via CNC are valued for their precision, consistency and high-volume output. Here are some of the key uses:
- Aircraft Assembly - CNC rivets are essential for airplane construction. Round, countersunk and specialty rivet types are used in wings, fuselages and other structures where reliable attachments are critical. Aerospace-grade aluminum, titanium and steel alloys are typical materials.
- Machinery - Industrial equipment from automotive assemblies to mining machinery rely on CNC rivets to handle vibration and heavy loads. Stainless steel and carbon steel are common material choices.
- Rail and Mass Transit - Railway vehicles and infrastructure utilize CNC rivets for safety-critical connections. Applications range from tracks and railcars to station platforms.
- Bridges - Structural steel girder bridges make extensive use of CNC rivets. They are also found on truss bridges, arch bridges and cable-stayed spans. Rivets handle dynamic wind, traffic and seismic loads.
- Shipbuilding - The marine environment demands high-strength, corrosion-resistant CNC rivets. They are found throughout vessels from decks to hulls. Common materials are stainless steel, aluminum and copper alloys.
- Construction Equipment - Cranes, bulldozers, backhoes and other heavy machinery operate under high stress. CNC rivets safely join and support components.
- Appliances - Washing machines, dryers, dishwashers and other home/commercial appliances rely on vibration-resistant CNC rivets in their assemblies.
- Electronic Enclosures - Rugged computer, server and control system housings make extensive use of CNC rivets for durability and EMI/RFI shielding.
Conclusion
With their precision, consistency and efficient production, CNC-made rivets are an indispensable fastening component for critical manufacturing industries. From aircraft and appliances to machinery and transit systems, rivets play a vital role in durable, reliable and safe product assembly. Continued advances in CNC technology will drive further improvements in rivet quality and capabilities. CNC Milling