Quality Rivets for CNC Machining(die casting process Roy)

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Rivets are a crucial component in many manufacturing and engineering applications. For products made using computer numerical control (CNC) machining, having high quality rivets is essential for creating robust, long-lasting products. In this article, we’ll look at what makes for excellent rivets in CNC machined products and how to source them.
What are Rivets?
A rivet is a mechanical fastener that connects two or more materials by inserting its shaft through holes in the materials and forming a head on one or both ends. The rivet holds the materials together through friction and pressure exerted by the deformed head(s). They provide a permanent mechanical attachment that is reliable and tamper-resistant.
Rivets come in a variety of head shapes, materials, sizes and strengths to accommodate different design needs. Common head shapes include round, countersunk, and universal. Popular materials for rivets include aluminum, steel, titanium, copper, and Monel. They are manufactured in diameters from 1/16 inch to over 1 inch.
Benefits of Quality Rivets in CNC Machining
Using top-notch rivets in CNC machined products provides several important benefits:
- Strength and durability: High quality rivets made from strong materials are able to withstand significant shear and tensile stresses without failing. This results in finished products that are rugged and built to last.
- Reliability: Properly set quality rivets are incredibly reliable fasteners. They have consistent clamping force and very low rates of loosening or failure when subjected to vibration, shock, and thermal cycling.
- Cost effectiveness: Though high grade rivets have a higher upfront cost, their superior strength means fewer fasteners may be required. This can offset costs. Their durability also reduces repair and replacement costs.
- Appearance: Good rivets form tight fit joints and have neatly formed, consistent head shapes. This gives products a robust, polished look.
- Ease of assembly: Quality rivets go into place smoothly and easily in CNC machined holes. This facilitates faster assembly times.
Considerations for CNC Machining Usage
To maximize performance of rivets used in CNC machined products, certain factors should be considered:
- Material: Rivet material should be chosen based on strength, corrosion resistance, and temperature needs. Aluminum is lightweight and strong, while stainless steel offers high strength and corrosion resistance.
- Size: Optimal rivet diameter depends on materials being joined and service loads. Larger diameters offer greater strength. Match diameter to hole size for best results.
- Head style: Countersunk heads are best for flush surfaces. Protruding head rivets transfer greater shear loads. Choose per application needs.
- Drill point: For ease of insertion, select rivets with drill point tips when self-piercing is required. This facilitates driving into unmached holes.
- Grip range: Select rivet grip lengths to properly accommodate material thicknesses being joined. This optimizes clamping force.
- Plating: For corrosion resistance in abrasive environments, choose rivets with platings like zinc, cadmium, or chromium.
Sources for Quality CNC Rivets
Trusted industrial suppliers like McMaster-Carr, Fastenal, and Grainger stock extensive selections of high quality rivets suitable for CNC machined components. They offer a wide range of materials, head types, diameters, lengths, and platings. For specialty applications, manufacturers like Cherry Aerospace and Falcon Fastening Systems can provide made-to-order rivets. Key things to look for are tight size tolerances, high shear and tensile strength ratings, positive lot traceability, and testing/quality certifications.
Inspection and Testing
To ensure rivets meet specifications for high precision CNC machined components, full inspection and testing should be conducted. Dimensional characteristics like head diameter, shank diameter, and length should be checked for conformance to tolerances. Mechanical testing should confirm shear and tensile strength. Destructive testing on sample rivets can check grip range and ductility. Advanced quality control methods like X-ray fluorescence can detect material impurities. Positive part identification and lot traceability are also musts.
Proper rivet installation is equally important. Following manufacturer instructions for hole sizing, drilling, and setting is essential. Operators must be trained to identify any defects. Periodic retesting helps monitor for variations in quality.
Conclusion
Quality rivets are a key component in CNC machined products where strength, durability, and appealing fit and finish are priorities. Careful selection of rivet materials, sizes, and design features tailored to the application is needed. Reputable industrial suppliers and manufacturers capable of meeting precise specifications are the best rivet sources. Rigorous inspection and testing ensures rivets consistently meet specifications. With proper rivets and installation, CNC machined products will have the high quality construction to meet demanding mechanical requirements. CNC Milling