High Quality Rivets for CNC Machining Applications(engineering fillet Sabrina)
- source:GAENOR CNC Machining
What Makes a Rivet High Quality for CNC Use?
There are several factors that determine the quality and suitability of rivets for CNC machining:
Material - Aircraft grade aluminum is the most common material for CNC rivets. Its strength, lightweight properties, corrosion resistance and easy machinability make it ideal for high performance assemblies. Other materials like stainless steel, titanium and specialty alloys are also used.
Strength - The rivet needs to have excellent tensile and shear strength to join parts securely while handling CNC machining stresses. High strength rivets are typically heat treated or cold headed to enhance their mechanical properties.
Consistency - Dimensional consistency is critical for precision CNC work. Quality rivets will meet exacting standards for the head diameter, shank diameter, length and other dimensions. This ensures uniform engagement and clinching.
Coating - Special coatings like alodine, passivation and lubricity coatings protect against galling and improve machinability. This reduces tool wear during driving and clinching.
Shank Design - Most CNC rivets have a chamfered or radiused shank design to facilitate insertion and heading. This improves flow during cold heading and reduces stress.
Head Style - Common head styles like universal, countersunk, button and large flange are available for different CNC applications. The head must withstand machine pressing forces and grip parts securely.
Why Use Quality Rivets for CNC?
Using high quality rivets designed specifically for CNC fabrication and machining has many benefits:
Precision - Quality rivets allow for more precise alignment and engagement during machine clinching for tight tolerances.
Strength - The joint will have higher shear and tensile strength when quality rivets are used. This leads to better performance in the end product.
Speed - Quality rivets machine efficiently. Less tool wear and good rivet flow lead to faster cycle times on CNC machines.
Reliability - Consistent quality rivets improve process reliability. The machine is less likely to reject rivets or have feeding issues that cause downtime.
Appearance - Good rivet heads provide an attractive flush finish. Countersunk and button heads give a cleaner appearance in the final assembly.
Control - Better control over hole fill percentage and clinch gives consistently secure joints. Quality rivets also allow for automated quality control checks.
Longevity - Aircraft grade aluminum and high strength alloys extend service life compared to weaker rivets that can shear prematurely.
Special Features - Additional features like pre-applied locking elements are available for even greater holding power.
With precision CNC equipment, quality rivets are imperative for realizing the full process capabilities in accuracy, speed and overall productivity.
Key Manufacturing Processes for Quality CNC Rivets
Producing quality rivets for CNC applications involves specialized manufacturing techniques that result in enhanced consistency and performance:
Heading - The rivet head is formed using cold heading machines that massively compress the material to form the head shape without cracks or defects.
Heat treating - Specific alloys are heat treated to impart targeted mechanical properties like strength and machinability. This produces a uniform grain structure.
Coating - Chemical or electrochemical coatings are applied to provide lubricity, galling resistance and other properties.
Shaving - Precision shaving removes any residual flashes or unevenness from cold heading to achieve stringent diameter tolerances.
Chamfering - The rivet shank is chamfered to facilitate smooth driving and insertion into holes during CNC riveting.
QC checks - Automated quality control ensures each batch meets specifications for dimensions, mechanical properties, coating thickness and visual defects.
Inventory control - Strict FIFO (first-in, first-out) inventory management eliminates age-related variability in the rivets.
With expertise in these critical processes, leading rivet manufacturers can provide CNC operators with the most advanced rivets to optimize machining results and productivity.
Custom Options for CNC Rivets
In addition to a wide range of standard stock CNC rivets, custom options are available for unique applications:
Materials - Exotic alloys like titanium or Inconel can be sourced for specialized needs in strength and corrosion resistance.
Coatings - Special platings like zinc nickel and customized lubricants are options for enhancing performance.
Dimensions - Any required head diameter, shank diameter, length combination can be sourced for optimal clinching.
Head styles - Custom heads can be produced, such as large countersunk for greater surface contact.
Strength - Higher shear and tensile strength rivets support specific strength targets in the joint.
Quantity - For high volume production, bulk quantity pricing can provide savings on custom CNC rivets.
By starting with application specifications, manufacturers can help select the ideal custom CNC rivet or develop new designs to meet performance requirements.
With so much relying on rivets to join materials in CNC machined products, using the highest quality options is critical. Seeking out rivets made from aircraft-grade aluminum or advanced alloys, precision headed, consistently coated and dimensionally controlled will lead to enhanced quality, speed and reliability in CNC fabrication. Work with a leading rivet manufacturer to source optimized and customized CNC rivets that will maximize the benefits of your CNC machines and processes. CNC Milling CNC Machining