High Quality Rivets for Precision CNC Machining(chamfered edge Colin)
- source:ESKRIDGE CNC Machining
What are Rivets?
A rivet is a mechanical fastener that permanently joins materials by mechanically deforming a shank, creating a bulge called a shop head. The rivet is inserted into pre-drilled holes in the materials being joined, and tools apply pressure to form the shop head and clamp the materials together. Rivets come in a wide range of materials, head styles, diameters and lengths to accommodate different assembly requirements.
Common rivet materials are aluminum, steel, copper, stainless steel, titanium and monel. Aluminum and steel rivets are popular for industrial applications due to their strength, corrosion resistance and cost-effectiveness. More exotic materials like titanium or monel are chosen when rivets need to withstand extreme environments.
The three most common rivet head styles are round, countersunk and brazier. Round head rivets protrude from the surface, while countersunk heads sit flush. Brazier head rivets have a low rounded profile above the surface. Head style impacts the look of the finished product and accessibility for riveting tools.
Why Rivet Quality Matters for CNC Machining
Computer numerical control (CNC) machining utilizes programmed automation to precisely cut, shape and form materials. CNC machines rely on CAD/CAM software to direct cutting tools and produce finished parts. The aerospace, defense, medical, automotive and electronics industries all leverage CNC machining for high accuracy components.
Since CNC machining aims for tight dimensional tolerances and minimal defects, using high quality rivets is critical. Any variability in rivet diameter, length, head shape or alignment will translate into assembly errors. This can lead to scrapped parts, reduced throughput and higher costs.
High quality rivets exhibit the following characteristics that make them well-suited for precision CNC machining:
- Consistent dimensions - Rivet diameters, lengths, head thicknesses and other specs remain within tight tolerances from rivet to rivet. This prevents issues when rivets are inserted into CNC-drilled holes.
- Concentricity - The rivet shank is perfectly centered within the head. Eccentricity or lopsidedness during head forming creates alignment problems.
- No warping - Some rivet fabrication methods can cause warping on cooling, leading to non-uniform parts. Warpage introduces variances that disrupt CNC operations.
- Fine surface finish - Smooth, uniform finishes allow consistent joining. Pits, voids and irregularities on the rivet surface impact assembly quality.
- High sheer strength - Strong rivets withstand CNC machining forces and avoid premature failure. Rivets should meet or exceed industry sheer strength standards.
- Made from certified materials - Raw materials for quality rivets come from suppliers that adhere to tight purity and composition standards. This prevents defects or performance issues.
Following established industry standards like NASM MS/ANSI B27.1 for rivet quality provides further assurance that rivets meet necessary CNC requirements. Reputable manufacturers will certify their rivets to these and other applicable specs.
Choosing the Best Rivets for Your CNC Needs
With an understanding of critical rivet quality factors, you can select optimal rivets based on your CNC machining application requirements. Here are key considerations when sourcing rivets for precision CNC operations:
- Base material - Match rivet material to the pieces being joined to prevent galvanic corrosion. Popular choices are aluminum for aluminum parts, steel for steel, etc. Exotic materials may call for higher-end rivets.
- Diameter range - Have rivets on-hand to match the range of hole diameters drilled by your CNC machines. This includes different imperial and metric sizes.
- Head styles - Select round, countersunk and/or brazier head rivets per aesthetic needs and equipment clearances.
- Strength - Make sure rivet sheer strength meets or exceeds the demands of your application. This protects finished products from premature failure.
- Finish - For tight clearance fits, satin or brushed finished rivets allow smoother insertion than rough textured rivets.
- Certifications - Look for rivets certified to standards like NASM MS, ANSI, ASME, etc. This validates quality processes.
- Manufacturer reputation – Source from established manufacturers with years of experience supplying rivets for CNC machining and demanding industrial applications.
By taking these factors into account, you can procure affordable rivets delivering the quality and consistency needed for trouble-free, precision CNC machining. Partnering with a trusted distributor makes acquiring recommended rivet types and quantities simple. With a steady inventory of top-notch rivets, your CNC operations will produce flawless outcomes rivet after rivet. CNC Milling CNC Machining