Unveiling the Diverse Types of Fasteners Used in CNC Machining--cncmass.com(delrin material Dora)
- source:WEINBERG CNC Machining
Fasteners play a crucial role in various industries, including CNC machining. These small components are essential for holding different parts together, ensuring structural integrity and functionality in mechanical assemblies. With countless types of fasteners available on the market today, it is important to understand their characteristics and applications within the realm of CNC machining.
1. Bolts and Screws:
Bolts and screws are some of the most commonly used fasteners in CNC machining. They secure two or more objects together by applying compressive force through their threads. Bolts typically require nuts to create a tight joint, while screws can be driven directly into tapped holes. The materials used for bolts and screws vary according to specific requirements, such as strength, corrosion resistance, and temperature resistance.
Nuts are paired with bolts and screws to provide the necessary clamping force for effective fastening. There are several types of nuts available, including hex nuts, flange nuts, wing nuts, and lock nuts. Hex nuts are widely used due to their simplicity and compatibility with standard wrench sizes. Flange nuts incorporate a base that increases stability and load-bearing capability. Wing nuts offer convenience in manual tightening, while lock nuts feature additional locking elements to prevent loosening under vibrations or heavy loads.
Washers are thin plates usually made of metal or plastic, designed to distribute the load over a larger surface area when tightened against a fastener. They help protect the surface finish of the connected components and reduce the risk of damage from excessive force. Commonly used washers include flat washers, spring washers, and lock washers. Spring washers provide controlled tension through their ability to deflect and absorb shock, while lock washers ensure high resistance to loosening caused by vibrations.
Rivets are permanent fasteners used to join two or more materials together by creating a strong, durable bond. They are typically made of steel, aluminum, or other alloys and come in various shapes and sizes. Rivets require a special installation method involving tools such as rivet guns or hammers. Through this process, the stem of the rivet is deformed, expanding the opposite end and securing the joint.
Threaded inserts are widely employed in CNC machining applications where frequent disassembly and reassembling are required. These inserts provide robust threads within materials that may not have the necessary strength to support direct threading. By improving thread engagement, inserts enhance reliability and durability. Commonly used types include helical inserts and press-in inserts that can be installed using ultrasonic or heat-insertion techniques.
6. Dowel Pins:
Dowel pins act as precision locating devices, ensuring accurate alignment between components during assembly. They feature cylindrical shape with tight tolerances and are usually made of hardened steel or stainless steel. Dowel pins are placed into drilled holes, providing precise positioning for mating parts while maintaining dimensional accuracy even under heavy loads or vibrations.
Fasteners play a vital role in CNC machining processes, enabling engineers and manufacturers to create robust and reliable mechanical assemblies. Understanding the various types of fasteners available, including bolts, screws, nuts, washers, rivets, inserts, and dowel pins, is crucial when selecting the best options for specific applications. Efficient selection and utilization of these essential components ensure secure connections, optimal functionality, enhanced structural integrity, and simplified maintenance procedures in CNC machining operations. CNC Milling