CNC (Computer Numerical Control) machining is a popular manufacturing method that involves the usage of computers to control machine tools. Key materials such as rivets and tack welding form integral parts of this process.
Rivets are permanently mechanical fasteners used extensively in various forms of fabrication, including those involving CNC machines. They create robust joints capable of withstanding significant amounts of stress. So when you enter the world of CNC machining, understanding how to produce and use rivets is instrumental.
In its simplest form, a rivet consists of a smooth cylindrical shaft with a head on one end. During installation, the rivet is placed into drilled or punched holes of two surfaces intended to be connected together. Then, through forging, the other end of the rivet is rolled out into another head, creating a connection that holds the two pieces securely.
Tack welding, on the other hand, is a type of spot welding method where metal surfaces are joined together by heat generated from resistance to electric current flow. It offers many advantages such as high-speed production rates, elimination of consumables, and excellent weld integrity.
Producing both rivets and utilizing tack welding within CNC machining requires well-articulated steps. Let’s delve deeper into these processes.
1. Machine Programming: The first step in any CNC machining task is the programming of the CNC machine. Using CAD (Computer-Aided Design) software, an engineer creates a 3D model of the component – in this case, the rivet. The software then generates a code which steers the machine’s movements.
2. Material Selection: Choose an appropriate material for your rivet based on requirements of strength, durability, corrosion resistance, among others. Similarly, select suitable workpieces that can withstand the high temperature involved in tack welding.
3. Feeding Program to CNC Machine: Once the material has been chosen, and the program is ready, it’s fed into the CNC machine. The machine reads this code to determine exactly how to create the product.
4. Material Machining: Following the programmed instructions, the CNC machine proceeds to cut, grind, or mill the raw material into the desired shape — a rivet in this case.
5. Final Checks: After machining, experts cross-check finished products with original design blueprints for accuracy and precision. Defected pieces are eliminated.
6. Riveting Process: With the finished rivets, carefully position them where you wish to join your materials together. Apply force on the unwidened end of the rivet until it expands enough to secure the workpieces firmly.
7. Tack Welding: Position the metals to be tack-welded securely, ensuring good contact between all surfaces. Trigger your welding gun and guide its electrode along the joint you want to weld. Thanks to high-speed electric charges, surfaces melt at the point of contact, creating robust joints once cooled.
Understanding and employing these two key components –rivets and tack welding within the CNC machinery ecosystem unlocks significant advantages ranging from improved production timelines to enhanced structural integrity of machined parts. Therefore, whether you are an upcoming or experienced player in the manufacturing space, harnessing these techniques is worthwhile.