flat washer is mainly used to reduce the pressure. When some parts are tightened with a large axial force, it is easy to press the washer into a disc shape. At this time, materials and hardness can be used to solve the problem. The locking effect of Spring washer is relatively general, and the important parts should be used as little as possible or not. Self-locking structure is adopted. For Spring washer used for high-speed tightening, it is better to use washer with alramenting treatment to improve its wear reduction performance, otherwise, it is easier to rub and heat and burn out the parts or cause the opening of the parts or even damage the surface of the connecting piece. Spring washer structure should not be adopted for thin plate connection. Spring washers are used less and less on cars. On the contrary, the connection tooth shape in the tooth-shaped elastic washer is widely used in the automobile industry due to its large locking force and uniformity, while the interval tooth type is less.
Flat washer is often used to reduce friction, prevent leakage, isolate, prevent loosening or disperse pressure. This component is available in many materials and structures for performing various similar functions. Limited by the material and process of threaded fasteners, the bearing surface of bolts and other fasteners is not large. Therefore, in order to reduce the pressure stress of the bearing surface and protect the surface of the connected parts, bolts are often equipped with flat washer, therefore, flat washer is an essential auxiliary accessory in bolt fasteners.
The material of flat washer is also different according to the pressure limit and the use environment. Common flat washers are made of iron, carbon steel, stainless steel, copper, plastic, etc. The size of flat washers is generally divided into standard size, increase, thicken, increase and thicken.