Uses for Rivets in CNC Machining and Manufacturing(casting defects Odelia)

  • Time:
  • Click:3
  • source:LONTL CNC Machining
Rivets are a common fastener used in manufacturing and fabrication. While screws, bolts, and welds are also popular options, rivets have some unique advantages that make them well-suited for certain applications, especially in CNC machining. Here are some of the top uses and benefits of rivets in CNC and manufacturing:
Joining Thin Materials
One of the main benefits of rivets is their ability to join thin sheets of material. Rivets form a mechanical bond by flaring out when compressed, creating a wide clamping force on thin material. This makes rivets ideal for joining sheet metal in applications like aircraft construction, electronic enclosures, HVAC ductwork, and more. The CNC machining process allows rivet holes to be quickly and precisely drilled for accurate placement.
Lightweight Structural Fastening
Rivets create a solid fastening while adding very little weight, making them useful for assembling lightweight structures. Tightly spaced rows of rivets can connect structural members in a lightweight but rigid joint. CNC automation allows for the quick installation of the many rivets needed for these large connections. Aircraft, mobile equipment, stages, scaffolding, and similar structures often rely on rivets for strength without excessive weight.
Vibration Resistance
Unlike screws and bolts, the flared ends of rivets lock components together so they cannot loosen. This makes riveted joints resistant to vibration forces. CNC offers excellent precision for drilling rivet holes in exactly matched positions on mating components. Riveting is commonly used on machinery, vehicles, and structures subject to vibration like truck frames, construction equipment, pumps, and more.
Water Tightness
Properly installed rivets form tight clinched joints that seal out moisture. This water/air tightness makes riveting well-suited for enclosures, vessels, and ducts. CNC allows rivets to be quickly placed in consistent, watertight patterns. Applications like electronics cases, hydraulic cylinders, process piping, and tanks are often assembled using waterproof riveted seams.
Speed of Assembly
Riveting is a very fast mechanical fastening method, especially with CNC machinery. Automated CNC systems can drill precision rivet holes and quickly drive multiple rivets with pneumatic, hydraulic, or servo tools. This enables high-volume production and efficient field assembly of large riveted structures. Speed of automated riveting makes it ideal for manufacturing appliances, building components, trailer and vehicle frames, and similar products.
Security Fastening
The flared ends of rivets cannot be removed once installed without drilling out the rivet. This makes riveting advantageous where permanent, tamper-resistant fastening is needed. CNC precision allows flush riveting for a smooth surface. Applications like jail cell construction, truck trailer panels, ATM enclosures, meter boxes, and sensitive electronics often use rivets for security fastening.
Blind Fastening
Rivets can join materials where access is only available from one side. Blind rivets are installed by pulling a stem to flare the rivet from one side. CNC drilling provides accuracy for placing blind rivet holes properly. Blind riveting is used on assemblies where only one surface is open like ducting, enclosures, machinery, and structure frames.
No Sparking
Steel rivets driven against aluminum or magnesium will not spark like traditional steel hardware. This spark-free characteristic makes rivets preferable for applications like explosive environments, flammable gas tanks, grain silos, and more. CNC automation allows large volumes of rivets to be quickly installed for reduced risk.
No High Heat or Hazards
Riveting installation does not require heat like welding or hazards like soldering. The mechanical cold forming process is safe for production and field use. CNC efficiently drills holes and inserts rivets for rapid low-risk production. Riveting can often replace welding or adhesives to speed up assembly without the risks.
Material Options
While steel is common, rivets come in a wide range of material options like aluminum, copper, stainless steel, and more. CNC precision allows any material rivets to be inserted in the ideal locations based on strength, corrosion resistance, appearance, and other factors. This versatility suits rivets well for diverse products and operating environments.
Low Cost
Rivets are relatively inexpensive fasteners, especially considering their strength and reliability. Automated CNC riveting improves productivity to further reduce overall assembly costs. The riveting process uses minimal material for low part costs. And since rivets avoid threading, they can be used with softer, more economical metals. These factors make riveting a very cost-effective assembly method.
Simple Process
The riveting process itself requires no special skills beyond basic training. CNC machines perform the skilled drilling and rivet insertion work precisely and consistently. This simplifies quality control and allows less experienced technicians to carry out riveting work. The simple installation process also reduces chances for human error during production.
Allows Dissimilar Materials
Riveting can join different metals or other materials that might be difficult to weld or bond together. The mechanical clinching does not rely on metallurgical compatibility. CNC precision drilling ensures materials align properly regardless of differences in hardness, stiffness, or thermal properties. Riveting sees use joining metals to plastics, glass, stone, ceramics, and composites.
Noise Reduction
Properly tightened rivets dampen vibration that causes noise. Layered panels joined with riveted seams are common in automotive and appliance applications to reduce transmitted noise. CNC automated riveting provides the needed consistency and speed for economical production of riveted sound-dampened assemblies.
Heat/Electrical Conduction
While rivets conduct less than welds, their positive mechanical clamping does allow heat and electrical current to pass between joined materials. Rivets can be applied in automated patterns and densities by CNC to create desired conduction across a joint. This sees use in electronics cooling, grounding, and other applications.
Decorative Appearance
The symmetrical domed heads of rivets can provide a clean, finished appearance to a product. CNC allows rivets to be attractively placed for optimal visual effect. Rivet heads can even be colored, textured, or branded for enhanced decorative value. Riveting finds use decoratively in furniture, retail displays, art pieces, and similar applications.
In summary, rivets are advantageous fasteners for many manufacturing and fabrication applications thanks to their lightweight strength, vibration resistance, speed of assembly, security, and overall economy. CNC automated drilling and rivet insertion improves the consistency and efficiency of riveting for all these uses, making it an ideal production process for a wide range of products and industries. CNC Milling CNC Machining