There are many types of fasteners in the market these days. Sometimes it is confusing but you have to know the different types and applications to make an informed decision. Having the right washer is vital to ensure a successful operation. If in this case, you need spring washer, you have to know different things.
What is spring washer?
Spring washers are called disc springs. If it is subject to a load, the irregularities will compress with equal resistance to go back to their pre-deflected shape. It is used to prevent the loosening and fastening against vibrations or tensions.
What is the process?
When it deflects under a load, the spring washer is akin to a compression spring. Taller or thicker spring washers can withstand more loads. When exposed to stress, the raised irregularities will flatten to a predetermined angle. You have to know that spring washers can be under dynamic or static load. In dynamic load, the washer functions as bending spring. The yield should not exceed. In static load, the washer will retain the load. The yield is elastic that is why it can exceed. Spring washers experience elastic deformation. This is a reversible process. You will know if it is the end of its cycle life when the plastic deformation is irreversible.
How about the production?
In the case of production methods, spring washer manufacturer makes sure that there is stamping, machining, forging, rolling or combination of these things. After the creation, the spring washer will have an acceptable deformation after the initial compression and it will not revert to its previous height. This is called setting.
What are the configurations?
There are many configurations of spring washers namely Belleville, Crescent, Dome, Finger, Wave and Single Wave. Belleville is designed with the small deflection but it can support high loads. Crescent is designed with the small deflection but it can only support lighter loads. Dome is designed with the small deflection but with a very high load capacity. Wave is designed for moderate load capacity. The finger is designed with the flexibility you see from a crescent washer and dispersed load points of waver washer. A single wave is akin to crescent washers but it has even load points to minimise abrasions.
What are the specifications?
For the specifications, you need to consider the washer dimension, washer material, spring rate and force, washer stress and fatigue, friction and lubrication, washer hardening and environment. If you wonder about the washer dimension, you have to know that it is critical to the successful implementation. In diameter, you need to consider Outer Diameter (OD), Inner Diameter (ID), Diameter Across Slots (DAS), Diameter of Center Rotation (DCR), Cone Height (CH), Plate Thickness (T), and Washer envelope. Another critical factor in the success of the operation is the material used. In spring washers, the materials used are steel, copper alloys, and nickel-chrome or nickel-chrome-cobalt.
With the things mentioned above, you will understand the spring washers more. You do not need to be a mechanical engineer to understand it. The price will depend on several factors but when it comes to structural integrity, do not compromise.