High Quality Rivets for CNC Machinery(what is spot welding May)

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Rivets are a vital component in many manufacturing and engineering applications. Especially for computer numerical control (CNC) machines, having rivets that are precisely manufactured and consistent in quality is essential. This article will examine what makes for excellent rivets for use in CNC machines, the manufacturing process, and some top suppliers of quality rivets.
What Makes a High Quality Rivet?
There are several key factors that contribute to a rivet being deemed high quality for CNC applications:
- Tight dimensional tolerances - The head diameter, shank diameter, head height and overall length need to meet exact specifications. Even minute variations can impair function.
- Consistent hardness - The optimal rivet hardness varies based on application, but consistency from rivet to rivet is paramount. Hardness impacts drivability and strength.
- Alloy composition - Aircraft-grade aluminum alloys like 2117 and 5056 are common for CNC rivets and offer good machinability, strength and corrosion resistance.
- Head style - Various head shapes like 100° countersunk and universal are available to suit different fastening needs.
- Strong grip - The rivet must securely grip the materials it is joining together without cracking or pulling loose over time.
- No defects - Flaws in the shaft or head can lead to rivet failure. Consistent quality control is a must.
The Manufacturing Process
Manufacturing consistent, high precision rivets suitable for CNC machinery involves the following steps:
- Alloy material preparation - Aluminum rods are cast to the required alloy composition. Trace elements like magnesium and manganese are added to obtain the desired properties.
- Heading - The headed end of the rivet is formed first. Heading machines compress the rod using punches and dies to flare out the head.
- Shaving - Next the rivet body is precisely shaved to the proper diameter. Allowance is made for the later forming of the second head.
- Pointing - The rivet tip is pointed to ease insertion into the drilled hole during riveting.
- Heat treatment - For higher strength alloys, the rivets are heat treated via quenching and aging to increase hardness.
- Head forming - The second head is formed using heading machines. Multi-blow heading is often used for improved head symmetry.
- Quality control - Dimensional tolerances are verified, and testing is done to check mechanical properties and chemical composition.
Top Quality CNC Rivet Manufacturers
Some leading producers of top quality rivets for demanding CNC applications include:
Cherry Aerospace - Offers a extensive inventory of 2117 and 5056 rivets to aerospace standards. Rivets come with certification data packs.
Allfasteners - Supplies aircraft-grade aluminum rivets in all common head styles and diameters for next-day delivery. Custom lengths are available.
Advance Components - In-house manufacture of aluminum, steel, stainless steel, copper and brass rivets with quality control testing.
PECA Precision - Specializes in custom CNC rivets and cold formed components. Capable of holding very tight tolerances.
B&B Specialties - Provides specialty rivets like clinch and drive rivets for automated riveting systems. High volume capacity.
PennEngineering - Leading brand Avdel offers rivets optimized for robotic and automated fastening in various head styles.
From precision heading and forming machinery to extensive quality control procedures, manufacturing reliable rivets for CNC equipment requires substantial expertise. With tight dimensional tolerances and consistent material properties being so crucial, using rivets from an established manufacturer specializing in high-performance structural rivets is advised. The slight added cost of quality is insignificant compared to the enormous costs of equipment downtime and failures. By understanding what attributes make for excellent CNC rivets, engineers can be confident they are selecting the best components for the job. CNC Milling