High Quality Rivets for CNC Machining(bead blasting aluminum Daphne)
- source:BAGANZ CNC Machining
What Makes a Quality Rivet?
When assessing rivet quality, there are several key factors to consider:
Material - Aircraft grade aluminum is the most common material for high strength rivets. Steel and titanium alloys are also used for specialty applications. The material must have consistent hardness and be resistant to shearing.
Dimensional accuracy - Quality rivets have an extremely tight tolerance on shaft diameter, head height, and other critical dimensions. This ensures consistency and proper fit.
Concentricity - On a quality rivet, the shaft is precisely concentric to the underside of the head. This allows uniform force distribution when set.
Surface finish - The surface should be free of cracks, folds, and other defects. A smooth surface prevents stress concentrations.
Hardness - The rivet must maintain consistent hardness throughout. This prevents failure under pressure and fatigue.
Why Rivet Quality Matters for CNC
On a CNC machine, the riveting process is automated based on programmed specifications. Using poor quality rivets can lead to the following problems:
Inaccurate hole fill - If shaft diameter varies beyond the tolerance, the rivet may be too loose or too tight in the hole. This affects strength.
Uneven setting - Non-concentric rivets distribute force unevenly, leading to inconsistent peening and loose joints.
Variable grip length - Inconsistent head height gives rivets different grip lengths, which can distort parts.
Early failure - Defects and inconsistencies lead to cracked, sheared, or otherwise failed rivets over time.
Re-work and rejects - Bad rivets must be drilled out and replaced, increasing production time and cost.
To avoid these issues, using properly specified, high precision rivets is a must for CNC-driven manufacturing processes.
Recommended Rivets for CNC Applications
Here are some of the best options when selecting rivets for CNC machinery and processes:
Aircraft Grade Aluminum - Aluminum alloys 2014, 2024, 2117, 7050 offer the best strength for structural joints. They are lightweight and corrosion resistant too.
Steel Pull Rivets - These are extremely strong one-piece steel rivets ideal for high stress applications. Available with round, countersunk, or custom head profiles.
Blind Rivets - Where access is only on one side, blind rivets insert and expand to form the joint. Great for automated assembly.
Self-Piercing Rivets - These pierce and join material in a single process. No pre-drilling needed, so ideal for CNC efficiency.
Large Flange Rivets - For grip lengths over 1.5 inches, large flange rivets provide the big head contact area needed.
Custom Lengths & Head Styles - For specialized applications, custom CNC rivets can be manufactured to order with application-specific dimensions and profiles.
Setting the Right Specs
To get quality rivets tailored for your project, work closely with your supplier and provide all the critical specifications:
- Materials needed
- Strength/hardness requirements
- Dimensional tolerances
- Surface finish standards
- Quantity and head style preferences
- Performance testing expectations
With the right specifications communicated, a reputable rivet supplier will provide CNC-ready components guaranteed to optimize automated machining results and deliver a superior finished product.
Quality rivets designed specifically for CNC systems are critical for manufacturing success. By understanding what attributes make a rivet high quality and choosing aircraft-grade aluminum, steel, or application-specific custom options, you can ensure strong, precise, repeatable automated riveting results. With an optimized riveting process, your machined products will assemble smoothly, perform reliably, and deliver outstanding quality from start to finish. CNC Milling