High Quality Rivets for CNC Machines(rivits Salome)

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Rivets are a crucial component in many manufacturing and engineering applications. Especially for products made using computer numerical control (CNC) machines, having rivets that meet strict quality standards is essential. This article will provide an overview of what makes certain rivets well-suited for CNC applications and discuss recommended types and brands.
What Makes Rivets "High Quality"?
When looking for rivets to use in CNC projects and products, you want ones that have consistent physical properties and dimensions. This ensures accuracy and precision when the automated CNC machine installs the rivets. Here are some key factors that make up quality rivets:
- Tight dimensional tolerances - Quality rivets have an allowable variance in their specified diameter and length that falls within a tight range (e.g. +/- 0.1 mm). This prevents issues with variable grip and fit.
- Consistent hardness - The optimal rivet hardness balances driveability with resistance to damage. High grade rivets maintain a uniform hardness rating (usually measured on the Rockwell scale).
- Smooth surface finish - Premium rivets have a smooth, uniform surface texture. This prevents jamming inside CNC machinery and allows consistent joining.
- Minimum flash - Excess material ("flash") around the rivet head can interfere with automated processing. Top-tier rivets are manufactured to minimize flash.
- Resistance to deformation - Under processing pressure and friction, cheaper rivets are prone to warping or bending. Rigid, high-tensile rivets are required for CNC work.
- Made from durable alloys - Aircraft-grade aluminum and hardened steel alloys ensure high shear and tensile strength as well as corrosion resistance.
Following established aerospace standards, like NASM and MS, is a good baseline for assessing rivet quality. Reputable manufacturers will provide certification their rivets meet these specs.
Recommended Rivet Types for CNC
CNC machines are capable of installing a wide variety of rivet types and styles. However, for most general purposes, certain types tend to perform better. Here are some top options:
- Solid/Blind Rivets - This type uses a mandrel that snaps off after installation. Available in many head styles, materials (aluminum, steel) and flush rivet options. Easy for CNC automated loading and driving.
- Self-Piercing Rivets - As the name implies, these cut through and join sheets of material without pre-drilled holes. Require high precision and rigidity suited for CNC machines.
- Structural Rivets - With large flanged heads, these provide maximum strength for connecting structural joints. Common in aircraft and construction applications.
- Drive Rivets - Resemble bolts and require access to both sides of a joint. The protruding mandrel is driven/upset to expand the rivet. Allow very secure fastening in CNC projects.
- Countersunk Rivets - Having flush, tapered heads, these are inserted into countersunk holes. Give a smooth finished appearance and surface.
- Multi-Grip Rivets - Single rivet design grips varying material thicknesses. Compensates for dimensional variations and reduces needs for different rivet sizes.
Leading Suppliers of CNC Rivets
Where you source your rivets plays a big role in the quality and performance you'll get from them. Here are some of the top manufacturers known for making exceptional rivets for CNC applications:
- Avdel Global - Offers a vast selection including Avibulb, Avinox, and Avseal rivets to suit different needs. Used widely in aerospace and defense.
- Alcoa Fastening Systems - A leading aerospace brand offering structural and blind monobolt rivets. Caters to demanding airline and spacecraft builders.
- Lisi Aerospace - French-based company manufacturing a range of premium structural rivets for aviation and spacecraft.
- Stanley Engineered Fastening - A division of Stanley Black & Decker, makes diverse Pop, Emhart and other branded rivets. Known for precision and reliability.
- TriMas Aerospace - Supplies and distributes a variety of MS, NAS and other certified rivets for aerospace, defense and general use.
- B&B Specialties - Top choice for self-piercing and multi-grip rivets. Used by auto, machinery and specialty manufacturers.
Always look for consistency in material, specs, and manufacturing from batch to batch when sourcing rivets in bulk for CNC work. Review technical data sheets and ask suppliers about their quality control as well.
Proper Rivet Handling for CNC Machines
To get the most out of quality CNC rivets, you need to exercise care in their handling and storage:
- Keep uninstalled rivets in clearly marked, sealed containers to prevent contamination or damage. Separate by material, type, size, etc.
- Avoid shaking or dropping boxes of loose rivets which can cause abrasion and impact damage.
- For moisture-sensitive metal rivets, use desiccant bags and sealed storage bins to prevent corrosion.
- Don't overload feeder bowls on CNC machines, causing jamming from tangling.
- Clean out residual shavings, mandrel pieces, etc. from rivet installation debris regularly.
- Limit exposure to dirt, oils, chemicals, and extreme temps which compromise rivet integrity.
- Establish FIFO (first-in, first-out) stock rotation and use rivets before expiration dates.
Proper handling keeps rivets in pristine condition before loading into the CNC machine magazine for trouble-free automated installation.
In Summary
Rivets are intricate parts that require consistency, precision, and care - especially for CNC automated applications. Seeking out high-grade rivets from reputable manufacturers, selecting the right rivet types, and exercising diligent handling practices will help ensure your CNC riveting process goes smoothly and produces quality results. With an ample supply of top-notch rivets feeding your CNC machine, you can achieve reliable and efficient joining for all your production needs. CNC Milling