Quality Rivets for CNC Applications - A Guide to Choosing the Best Fasteners (powder coat finish Vicky)
- source:ZIEG CNC Machining
Overview of Rivets for CNC Machines
Rivets are tubular fasteners that join materials by flaring out when the tail is compressed. They create permanent fastening better than traditional screws or bolts in many cases. In CNC machining, rivets assemble sheet metal, plastic, and other fabrication materials in everything from aircraft and autos to electronics, appliances and more.
CNC equipment like lathes, mills, routers and drills precisely cut, drill and insert rivets to join components together. Riveting with CNC boosts efficiency and accuracy versus manual installation. Programming can automate riveting production while sophisticated CNC tools ensure rivet placement precision for strong bonds.
Key Rivet Attributes for CNC Applications
When evaluating rivets for CNC machinery, here are key attributes to consider:
- Strength and shear/tensile strength: Rivets must withstand forces from use without failing. Strength comes from the metal plus design attributes.
- Grip range: The thickness of materials the rivet can clamp together. Wider grip ranges provide flexibility.
- Diameter: Total rivet diameter impacts grip range and strength. Larger diameters often allow bigger grip ranges.
- Head shape: Countersunk, universal, large diameter and other head types serve different assembly needs.
- Mandrel: The central shafts left in some rivets after installation for tighter fit. Mandrels boost shear strength.
- Alloys: Aircraft-grade aluminum, steel, copper and specialty alloys impact rivet strengths.
The best rivets balance these properties for your specific CNC uses, whether that’s riveting sheet metal, fastening aircraft parts, assembling appliances or other fabrication tasks.
Popular Rivet Materials for CNC Machines
CNC shops can select from various rivet materials depending on strength needs, cost, weight and other demands. Common options include:
- Aluminum - Lightweight yet strong aluminum alloys like 2117 and 2024 are popular rivet choices, especially for aircraft. Aluminum's high shear and tensile strength suit it well for CNC uses.
- Steel - Steel offers high shear strength and hardness. Carbon steel, alloy steel or stainless provide excellent performance but add some weight.
- Copper - Due to good conductivity and corrosion resistance, copper rivets are common in electronics manufacturing. Copper alloys add strength for sturdy CNC riveting.
- Monel - This nickel alloy resists corrosion and acids and is very strong. Monel excels in demanding applications like marine hardware.
- Titanium - With high strength-to-weight ratio, titanium rivets suit aerospace and aviation uses. CNC titanium riveting requires rigor to prevent fire risks.
Beyond metals, some composite and plastic rivets work for light-duty bonding in CNC fabrication. Overall, most quality CNC rivets utilize steel, aluminum, copper or titanium alloys.
Tips for Choosing Optimal Rivets
Follow these tips when selecting rivets for your CNC machinery and workflow:
- Consider required strengths - shear, grip, tension - based on part usage and forces. Aircraft or vehicle parts often demand more robustness.
- Mind metal characteristics like hardness, ductility and corrosion resistance needs per application.
- Get sufficient grip range and diameters to rivet varying stock thicknesses flexibly.
- Select head shapes - countersunk, large diameter, etc. - fitting parts and assembly access.
- Evaluate any special demands like conductivity, acids/chemicals present, or weight limits affecting metal choices.
- Request rivet samples to test firsthand before buying bulk quantities of any rivet. Confirm fit and integrity.
- For critical applications, require material certifications from manufacturers documenting alloy grades used in rivets.
Investing in quality rivets made from optimal materials for your CNC machining delivers reliable end products. Partnering with reputable fastener suppliers that provide broad selection and custom options is advised when sourcing CNC rivets tailored to your production needs. With proper rivets in place, you can leverage the speed and accuracy of CNC machining for fast and consistent riveted assemblies. CNC Milling CNC Machining