The Importance of Quality Rivets in CNC Machining(deburing Bowen)
- source:BAGANZ CNC Machining
What are Rivets?
A rivet is a mechanical fastener used to join two or more materials together. Rivets consist of a smooth cylindrical shaft with a head on one end. The shaft is inserted through pre-drilled holes in the materials being joined and the protruding end is hammered or pressed into a second head shaped to grip the material. This creates a permanent joint.
Rivets come in a variety of styles, sizes and materials like aluminum, steel, copper, and more. The choice of rivet depends on the materials being joined and the strength required. Pop rivets are a popular type of rivet that can be quickly installed without special tools.
Applications of Rivets in CNC Machining
Rivets have many applications in CNC machined parts and products across industries like aerospace, automotive, electronics, appliances, and more. Here are some common uses:
- Aircraft and aerospace - Rivets are extensively used in the assembly of aircraft fuselages, wings, and other components. Aircraft grade rivets are exceptionally strong.
- Automobiles - Rivets assemble body panels, frames, doors, hoods, trim pieces, and other automotive parts. A car contains thousands of rivets.
- Electronics - Tiny rivets help assemble consumer electronics like computers, phones, printers, and more by joining internal framework and casings.
- Appliances - Household appliances like microwaves, washers, dryers, and refrigerators rely on rivets to assemble the external housing.
- Furniture - Rivets provide sturdy fastening for furniture frames, legs, supports, and trim.
- Construction - Rivets assemble rebar structures, racks, scaffolding, ladders, railings, and more.
Clearly, rivets play a key role in CNC machined products. The reliability of the end product depends on the quality of the rivets used.
Importance of Quality Rivets in CNC Machining
High quality rivets are extremely important in CNC machining for several reasons:
Reliability & Durability
Good rivets made from durable materials will withstand vibration, shock, and repeated stress without failing. This prevents product malfunctions or dangers from broken parts. Using cheap low-quality rivets risks material failure.
Quality rivets are precisely manufactured for uniformity. Consistent sizing, smooth finishes, and centered holes allow precise insertion during automated CNC riveting. This avoids production errors.
Strong rivets properly fasten materials without cracking or loosening. Low quality rivets may bend, shear, or pull through drilled holes causing joint failure. Aircraft grade rivets, for example, have incredible tensile strength.
Quality rivets are made from corrosion resistant materials or coatings. This prevents rusting that could compromise joints over time. Saltwater environments require highly corrosion resistant rivets.
Properly hardened rivets resist fatigue from repetitive loads. This prevents failure in parts subject to ongoing stresses like aircraft and cars. Fatigue resistance is critical for safety.
The heads of quality rivets have a consistent professional appearance. Neat rows of uniform rivet heads provide an aesthetically pleasing final product.
By using high quality rivets that are strong, precise, durable, and corrosion resistant, CNC machined products will have optimal reliability and durability.
Factors in Assessing Rivet Quality
So how should manufacturers assess rivet quality? Here are key factors to consider:
- Strength ratings - This includes shear strength, tensile strength, and other mechanical properties. Quality rivets meet or exceed the strength ratings required for the application.
- Materials used - Aircraft grade aluminum, stainless steel, titanium, and specialty alloys have high strength. Beware of cheap substitutions like steel claimed to be aircraft grade.
- Quality certifications - Reputable rivet suppliers should provide documentation of stringent quality control standards and procedures. ISO 9001 certification is a common benchmark.
- Dimensional accuracy - Diameter, hole size, head shape, shank length, and other dimensions should be precisely held to tight tolerances of less than a few thousandths of an inch.
- Finishing -Smooth, uniform finishes prevent defects like cracks or weak spots which compromise strength.
- Testing - Extensive in-house testing of sample rivets for tensile strength, shear strength, fatigue resistance, and more provides data to verify quality levels.
- Manufacturer reputation - Leading commercial rivet brands known for quality include Cherry Aerospace, LISI Aerospace, Ateliers de la Haute Garonne (AHG), and Alcoa Fastening Systems.
By thoroughly vetting suppliers based on these factors, CNC machining companies can ensure reliable, high-performance rivets.
In summary, quality rivets are absolutely critical in CNC machined products. Their precision, strength, corrosion resistance and durability directly impact the performance and safety of the end product. By partnering with reputable rivet manufacturers and inspecting rivets to meet stringent quality benchmarks, CNC machining companies can deliver exceptional products. Investing in quality rivets is an investment in quality end products. CNC Milling