Computer Numerical Control (CNC) turning is a significant component of modern machining activity that has revolutionized numerous industries. It involves removing material from rotating workpieces, thereby creating intricate parts using cutting tools. This highly precise machining process can effectively produce different types of components, including one common element in various sectors – rivets.
Rivets are small yet essential hardware pieces that secure two or more objects together permanently, mainly where welding is unsuitable. The fact that there are different types of rivets makes them versatile for multiple applications in construction, aircraft, automobiles, electronics, among others. An understanding of CNC turning and these various forms of rivets may be helpful to the layman and professional alike.
Producing Rivets through CNC Turning
Rivets’ production requires high accuracy and consistency which is achievable via CNC turning. A typical CNC turning setup entails an original drawing or design, Computer-Aided Design (CAD) software, cutting tools with specific shapes for handle lathing, milling, drilling, etc., and naturally, a CNC machine.
The CAD data for the required rivet part feeds into the CNC control system to guide the cutting operations. Depending on the complexity of the rivet’s geometry, multiple processes such as roughing, finishing, contouring, threading may occur successively within a single setup. Hence, irrespective of type- whether blind rivets, solid rivets, semi-tubular rivets, drive rivets, flush rivets, friction-lock rivets, shoulder rivets, or split rivets – CNC turning ensures accurate execution of designs.
Different Kinds of Rivets Produced by CNC Turning
1. Blind Rivets: Also known as pop rivets, they come handy when securing items from one side is only possible. Installing these non-removable fasteners involves inserting their cylindrical stem into a drilled hole, then pulling back until the rivet deforms and flattens against the surface.
2. Solid Rivets: These traditional and robust fasteners have been around even before the advent of screws. They involve placements into holes of two or more materials then hammering to deform one end, forming ‘shop head’, hence creating a strong hold.
3. Semi-Tubular Rivets: Unlike solid rivets, these hollow at one end rivets require less force during installation. Crimping or rolling over their open ends creates a secondary head, joining the underlying materials securely.
4. Drive Rivets: Here, pushing down the center pin with a hammer expands the body and secures the materials at hand permanently.
5. Flush Rivets: Commonly used in aircrafts due to their low aerodynamic interference, their flat heads sit flush with the joining material’s surface once installed.
6. Friction-Lock Rivets: Ideal for temporary fastening purposes like repairs, they use friction between the central mandrel and rivet shell to create a mechanical lock.
7. Shoulder Rivets: They feature an unthreaded shank with a circumferential shoulder under the head. Such structure allows for rotation in the assembly without loosening.
8. Split Rivets: Primarily designed to penetrate soft or brittle materials without causing splits, these staple-like rivets spread apart after installation.
In conclusion, the production of different types of rivets with seamless accuracy becomes feasible with CNC turning. This technological application helps meet diverse industrial requirements and standards, therefore serving an unbeatable role in today’s manufacturing landscape. Whether you’re in automotive fabrication, aerospace engineering, electronic assembly, construction, or any other industry requiring metalwork precision, CNC turning stands out as a reliable choice.
