High Quality Rivets for CNC Machined Parts(g-code cnc Hamiltion)
- source:ZIEG CNC Machining
What are Rivets?
A rivet is a permanent mechanical fastener that consists of two main parts - the rivet body and mandrel. The body is a headed pin that is inserted into a hole through the parts being joined. The protruding end is then mechanically deformed so that it expands, locking the rivet in place. The excess part of the rivet shank is then broken off. This creates a permanent bolt-like joint.
Rivets come in a wide variety of head shapes, sizes and materials to suit different applications. Compared to other fasteners like screws and bolts, rivets create a tighter joint and can handle vibration and shock loads better. Installation is also faster with rivets versus threading in screws.
Benefits of Rivets in CNC Machined Parts
Rivets offer unique benefits for CNC machined parts and products:
- Tight precision fit - The riveting process creates an incredibly tight fit between parts with close tolerances. This prevents loosening over time.
- Strength - Rivet joints have high shear and tensile strength, making them suitable for highly stressed connections. The deformed rivet shank resists forces trying to pull the joint apart.
- Vibration/shock resistance - Riveted joints better withstand repeated shock loading and vibration compared to threaded fasteners. This makes them ideal for components like machinery housings.
- Faster assembly - Automated riveting is much faster than inserting and threading multiple screws or bolts. This speeds up production.
- No thread wear - There are no threads to strip out on rivets versus bolts, so they maintain a tight joint even after repeated assembly/disassembly.
- Material options - Rivets come in a wide range of materials from various steels to copper, aluminum and even plastics. This allows matching the rivet material to the application.
Key Properties of Quality CNC Rivets
To get the full benefits of rivets in your CNC machined parts, it’s critical to select high quality rivets optimized for the application. Here are key factors to look for:
Material Grade and Strength
Aircraft quality rivets are available in variety of materials including various steel alloys, copper, nickel, aluminum, and more. The material must be strong enough to handle expected shear, tensile and vibration loads but also compatible with the base materials being joined. This ensures good corrosion resistance and joint integrity.
Quality rivets will adhere to tight dimensional tolerances for the shank diameter, head height, shank length, and other specs. This ensures a snug fit into pre-drilled CNC machined holes and proper deformation during installation for a tight joint. Reputable suppliers can provide detailed rivet measurement data.
Trustworthy rivet suppliers carefully control production processes to achieve consistent hardness throughout a rivet’s length. This prevents weak spots that can lead to failure down the road.
Dome, flat countersunk, and modified brazier head styles are common for CNC machined components. Matching the head shape to part geometry and assembly method is key. This allows flush final surfaces and eliminates unnecessary protrusions.
The grip range refers to the total thickness the rivet can fasten together. Good CNC rivets offer a wide grip range to accommodate various part thicknesses and design flexibility.
Properly finished rivets have a smooth, consistent surface free of scale, burrs and pits. This prevents snagging during automated installation and ensures consistent deformation.
Reputable CNC rivet suppliers can provide certifications showing their rivets meet various industrial standards like ASNA, NASM, and MS. Meeting stringent military specs, for example, validates excellent quality control.
Choosing the Right Rivets for Your CNC Machined Components
With an understanding of critical rivet properties, you can dial in the best rivet choice for your specific CNC machined parts and expected operating conditions.
Start by considering your base material - aluminum, steel, magnesium etc. Match the rivet material accordingly to prevent galvanic corrosion.
Determine required rivet diameter and grip range based on part thicknesses and hole clearances. A tight precision fit is ideal.
Select dome, countersunk or other head shape to suit joint geometry and assembly methods. Counterbore holes allow flush finish.
Consider expected stresses - shear, tension, torque, vibration - to choose ideal rivet material and hardness. Heat treating can increase strength.
Reference certifications from military or industrial standards to ensure high quality control and performance.
Partnering with a trusted rivet supplier that provides detailed technical data is invaluable for selecting optimized CNC rivets for each unique application. Investing in quality rivets ensures your CNC machined products have maximum structural integrity for years of service. CNC Milling CNC Machining