Computer numerical control (CNC) machining has revolutionized the manufacturing industry. Over recent years, it has garnered much popularity due to its precision and efficiency. One main application of this technology is in CNC turning processes, an integral part of various manufacturing sectors, including automotive, aerospace, and electronics industries.
In-depth knowledge of CNC turning is crucial, not only regarding its operation but also concerning the production of numerous components – rivets being a significant one. Therefore, gaining a keen understanding of different types of rivets produced via CNC turning adds value to anyone operating within this sector.
CNC Turning 101
CNC turning denotes a manufacturing process where bars of material are held in a chuck while rotated; simultaneously, a cutting tool is traversed to the bar to remove material and create the desired component shape. With advanced techniques like live tooling, milling features can be created on turned parts. This level of automation ensures accuracy, repeatability, and increased productivity which couldn’t be achieved with manual machining procedures.
CNC machines used for turning operations comprise lathes that operate either horizontally or vertically. They use computer-aided design (CAD) and computer-aided manufacturing (CAM) to produce designs and translate them into precise instructions for the machine.
Riveted about Rivets – Different Types
A rivet serves as a permanent mechanical fastener. Permanently installed into a drilled or punched hole, they have broad applications spanning across many industries, starting from fashion accessories such as belts and bags to larger constructions like bridges and buildings. According to their configuration and application, several types of rivets are manufactured using CNC turning:
1. Solid/round head rivets: Known for their robustness and reliability, these are heavily utilized in civil engineering and shipbuilding. The entire body of the rivet, including the head, is solid before being hammered into shape.
2. Semi-tubular rivets: These partially hollow rivets consume lesser drive force to assemble, rendering them appropriate for softer materials like wood and plastic.
3. Blind/pop rivets: Aptly named as they can be fully installed from one side, these are perfect for instances where the worker cannot access both sides of the workpiece.
4. Drive/hammer-drive rivets: Consisting of a short, cylindrical body topped with a chamfered head, these rivets are driven into place using a hammer or pneumatic tool which makes them ideal for high-speed assembly operations.
5. Shoulder rivets: These rivets feature a collar, or “shoulder”, between the head and the body. They’re most commonly used in pivot points due to their shoulder acting as a buffer when two pieces need to join but also move relative to each other.
Producing Rivets Using CNC Turning
The production process begins by creating design specifications through CAD software, converted later into machining instructions for the CNC machine. The raw material – typically steel, aluminum, copper, or brass – is then inserted into the CNC lathe. The machine follows the exact movements outlined by the CAM software to turn the bar until the rivet’s desired shape is achieved accurately and consistently.
Throughout this process, quality control measures are crucial to ensure that every single rivet meets the required standards for dimensional accuracy, stability, and strength. After turning, the rivets may undergo secondary processes such as coating or heat treatment depending on their intended application.
In conclusion, understanding CNC turning and different types of rivets it produces provides invaluable knowledge for those within manufacturing industries. This insight enables operators and engineers to make informed decisions about which type of rivet best suits their needs while guaranteeing precision and efficiency of production through the highly advanced field of CNC machining.