Introduction(laser etching Asa)

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Rivets are an important fastening technology used in many manufacturing applications, especially in metal fabrication. In computer numerical control (CNC) machining and manufacturing, rivets serve a variety of purposes from assembling products to repairing parts. Understanding the different types of rivets and their uses in CNC can help manufacturers select the right rivetting solutions for their specific needs.
What are Rivets?
A rivet is a mechanical fastener that consists of two main parts - a smooth cylindrical shaft and a head. The shaft is inserted into pre-drilled holes in the materials being joined. The excess portion of the shaft extends out the other side and is upset, or mushroomed out, to form the second head. This creates a permanent joint by clamping the materials together.
Rivets come in a wide variety of head shapes, materials, sizes and strengths to accommodate different applications. Common materials include aluminum, steel, copper, stainless steel, titanium and monel. heads can be round, flat, countersunk or brazier. Sizes range from 1/16 inch to over 1 inch in diameter.
Uses for Rivets in CNC
Joining Dissimilar Metals
Rivets provide a reliable way to join dissimilar metals in CNC products. For example, steel and aluminum parts can be joined together with steel rivets. The ductility of the rivet allows for differences in thermal expansion between the metals being joined. This helps prevent joint failure.
Permanent and Semipermanent Fastening
The rivet forms a permanent joint that does not loosen over time. This makes rivets suitable for CNC applications that require a permanent fastening method. In situations where semi-permanent fastening is needed, the rivets can be drilled out to disconnect the parts later on.
Rapid Assembly
Rivetting provides a fast way to assemble CNC fabricated metal parts. It is easier and faster than welding or bolting in many cases. This makes rivetting ideal for high volume production and assemblies. Self-piercing rivets that pierce the material during rivet setting further speed up the process.
Joints Requiring High Strength
Certain rivets, like high shear rivets, provide very high joint strength capable of withstanding vibration, heavy loads and stress. These types of rivets are commonly used in aircraft production, bridges, railroad tracks, and other CNC applications requiring strong structural joints.
Waterproof and Airtight Sealing
Rivets form tight joints that seal out water, air and other fluids. This makes rivetting well-suited for pressurized systems and liquid storage tanks made using CNC machining. They provide reliable sealing for plumbing, hydraulic lines, valves and pumps in heavy machinery.
Repairing Damaged Parts
Rivetting supplies a fast, simple method for repairing cracks, leaks and damage to CNC fabricated parts. Machinists can drill out cracked or weakened areas and install rivets to patch holes, reinforce joints and prevent further damage. Rivetting avoids the need to scrap and replace expensive parts.
Remote/Confined Space Assembly
Rivetting tools allow operators to install rivets in hard to reach spaces that are inaccessible for welding or bolting. The handheld tools provide more maneuverability to attach rivets at odd angles and in tight areas of an assembly.
Different Types of Rivets for CNC Applications
Several types of rivets commonly used in CNC manufacturing include:
Blind Rivets - These rivets can be installed from one side when access to both sides is limited. The mandrel is pulled to form the second head. Often used for field repair and assemblies.
Solid Rivets - Made from a single piece of metal. Require access to both sides of the materials being joined. Very strong and reliable.
Self-Piercing Rivets - Combine piercing and rivet-setting in one operation. No need to pre-drill hole. Used for sheet materials.
Drive Rivets - Set by hammering or applying pressure. Used for high strength large scale connections.
Flush Rivets - Sit flush against the surface of the materials. Useful where smooth aerodynamic surface is needed.
Split Rivets - Rivets with split shaft that expands when set to fill hole. Provides tight seal and vibration resistance.
Conclusion
Rivets serve an important role in CNC machining and manufacturing. They provide versatile, reliable and efficient permanent fastening for assembling parts, sealing joints, repairing damaged products and more. With the variety of rivet types and materials available, CNC technicians can select optimal riveting solutions tailored to their specific application requirements. Understanding where and how to utilize the different rivet options allows manufacturers to improve the quality and durability of their CNC produced parts and end-products. CNC Milling CNC Machining