The Importance of Using Quality Rivets in CNC Machining(torsion snap joints Dennis)
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What are Rivets?
A rivet is a mechanical fastener that secures two or more pieces of material together. Rivets consist of two main components - the rivet body and rivet stem. The body is the flared end that is wider than the hole it fits into. The stem is the cylindrical shaft that gets inserted into the materials being joined.
Once inserted, the excess portion of the stem is cut off and the rivet body is "peened" or hammered to flare out the end. This flaring securely fastens the rivet in place. Rivets allow for a solid hold while still allowing some flexibility and movement.
Common Types of Rivets
There are several types of rivets that may be used in CNC machined products:
- Solid rivets - These are one piece and the most traditional type of rivet. They are reliable and sturdy.
- Blind rivets - These have a built-in stem that does not need to be accessible from both sides of the material. Useful where full access is not possible.
- Drive rivets - These use a threaded stem and machine screw head for easy installation. Allow for removal and reuse.
- Semi-tubular rivets - These have a partial hole in the head to allow some flexibility. Often used in sheet metal applications.
- Structural rivets - Designed for joining structural materials. Very high strength and thick shaft.
- Specialty rivets - Rivets designed for specific purposes, like high temperatures. May be made of special materials.
Applications of Rivets in CNC Machining
CNC machined parts are used in many industries from aerospace and defense to consumer products and automation equipment. Rivets have many applications in products produced through CNC machining processes like milling, turning, grinding, and drilling. Common uses of rivets include:
- Joining aluminum components - Aircraft and other vehicles use rivets to assemble aluminum structural pieces.
- Securing sheets of metal - Rivets are ideal for joining sheets of metal in enclosures, containers, and racks.
- Attaching components - Rivets provide a secure way to attach handles, hinges, brackets and other hardware.
- Fastening moving parts - Hinges, pivots, and other movable joints can be attached with rivets that allow flexibility.
- Providing sturdy construction - Rivets are rigid and can provide very sturdy construction in parts subject to vibrations.
- Allowing for disassembly - Drive rivets allow for non-destructive disassembly for maintenance and repairs.
For most CNC machined components, standard solid or blind rivets are sufficient. However, mission-critical aerospace and defense applications may rely on specialty high strength rivets.
The Role of Quality Rivets
While rivets may seem like an afterthought, low quality rivets can undermine the integrity of the final machined product. Factors that influence rivet quality include:
- Materials - Aircraft grade aluminum is superior for strength and corrosion resistance. Avoid cheap steel.
- Dimensional accuracy - Precise sizing is vital for correct fit and hole fill.
- Grip range - Must properly accommodate material thickness.
- Strength - Rivet must withstand shear and tensile stresses of application.
- Durability - Quality rivets maintain integrity in harsh conditions over time.
- Consistency - Reliable performance rivet-to-rivet.
Why Rivet Quality Matters
There are several reasons why using high quality rivets from reputable suppliers is recommended:
- Product durability - Quality rivets withstand stresses and last longer without failing.
- Reduced maintenance - Good rivets won't need reworking or replacement as often.
- Improved safety - Aircraft and other critical uses require rivets that won't fail.
- Avoiding defects - Poor rivets can crack, detach, corrode, or have other defects.
- Consistent performance - Reliable rivets provide predictable results during assembly.
- Reduced rework - Quality rivets install correctly the first time without issues.
- Cost savings - Though more expensive initially, good rivets save on labor costs long term.
In short, investing in quality rivets provides excellent value by boosting product performance and lifespan while minimizing maintenance needs.
Finding a Reputable Rivet Supplier
With an understanding of the importance of rivet quality, you’ll want to find a supplier that provides excellent products. Here are some tips for identifying reliable rivet sources:
- Make sure they specialize in rivets - This focus helps ensure quality procedures optimized for rivets.
- Look for aerospace-grade offerings - Suppliers who can provide rivets meeting rigorous aerospace standards are ideal.
- Check for certifications - ISO 9001 and AS9100 certifications indicate quality control.
- Review testing data - Legitimate suppliers will provide documentation of testing.
- Evaluate materials used - Look for aircraft aluminum, titanium, and specialty alloys.
- Inquire about lot traceability - The ability to trace rivets to precise manufacturing lots provides accountability.
- Ask about quality processes - Robust quality systems for inspection, testing, and supply chain control are essential.
- Consider custom options - The ability to order specialty rivet designs demonstrates manufacturing capabilities.
- Request samples - Hands-on evaluation of rivet quality before purchasing full lots.
Taking the time to find a supplier with advanced quality standards, capabilities, and reporting will pay dividends in the performance of your CNC machined products.
Conclusion
From critical aerospace components to everyday consumer goods, quality rivets play a key role in CNC machined products. While simple, rivets must exhibit precision manufacturing and materials to provide secure, reliable, and durable joins. By partnering with a reputable rivet supplier and investing in quality, you can achieve optimal product performance. With attention to this small but important part, you’ll reduce defects, minimize maintenance needs, and build products that withstand the test of time. CNC Milling CNC Machining