Exploring Different Types of Fasteners in CNC Machining--cncmass.com(rivet in sheet metal Phil)
- source:WEINBERG CNC Machining
CNC machining has revolutionized the manufacturing industry by enabling precise and efficient production. One vital aspect of this process is the use of fasteners, which are crucial for securing various components together. In this article, we will delve into different types of fasteners used in CNC machining processes and their significance.
1. Bolts and Screws:
Bolts and screws are among the most common types of fasteners utilized in CNC machining. These threaded fasteners come in a wide array of sizes and materials to accommodate diverse applications. Bolts typically feature an external threaded shaft and require a matching nut to secure two or more objects tightly in place. On the other hand, screws have threads that extend from neck to tip and can be directly driven into pre-tapped holes, making them ideal for standalone connections.
Nuts complement bolts and provide stability during assembly. Like bolts, nuts are available in numerous variants such as hexagonal, square, winged, and round. Hexagonal nuts with standard internal threading are commonly used in CNC machining due to their ease of handling and broad application range. Precision is key when choosing a suitable nut, ensuring it pairs perfectly with the bolt's thread size and pitch.
Washers are essential components in CNC machining, acting as spacers between fasteners and workpieces. By distributing load more evenly, washers minimize stress concentration on surfaces, reduce the risk of damage, and improve joint integrity. Flat washers, split lock washers, and toothed lock washers are some frequently employed varieties depend on specific requirements.
Rivets offer a permanent fastening solution in CNC machining where welding isn't feasible or desired. They consist of a smooth cylindrical shaft, called a shank, with one end forming a head after being flattened. The other end of the rivet locks into place by deforming under pressure, securing two or more materials together. Rivets find extensive use in construction, aerospace, and automotive industries due to their high strength and reliability.
5. Dowel Pins:
Dowel pins are precision cylindrical fasteners often used for aligning components during CNC machining processes. Manufactured with extreme accuracy from metals like stainless steel or hardened alloy steel, dowel pins ensure precise positioning and maintain assembly consistency. They are versatile and can be readily installed and removed, making them an ideal choice when repeated disassembly is required.
6. Threaded Inserts:
Threaded inserts play a crucial role in reinforcing weak material substrates or providing strong threads in softer materials. These inserts have internal threads that enable machine screws or bolts to securely fasten joints. Helical coil inserts, key-locking threaded inserts, and self-tapping inserts are commonly employed types, each serving specific purposes based on strength requirements, environmental conditions, and installation methods.
Fasteners are intrinsic parts of CNC machining processes, ensuring components remain securely attached together. Understanding different types of fasteners such as bolts, nuts, washers, rivets, dowel pins, and threaded inserts allows manufacturers to choose the right hardware based on factors like load-bearing capacity, material compatibility, and desired joint strength. The versatility offered by these fasteners paves the way for efficient manufacturing across various industries where CNC machining plays a pivotal role. CNC Milling