Do you understand the use of flat washers and spring washers?

As a part to prevent bolts and nuts from locking, flat washers are basically used where fasteners are used. Flat washers mainly play the role of increasing the contact area and fastening between products. By increasing the contact area, the damage caused by friction between parts can be reduced, and the pressure between nuts and equipment can be reduced, thus playing a protective role. Flat washers have no anti-loosening and anti-vibration effect. When using flat washers, they are often used in conjunction with nuts. In the following cases, we can prioritize the use of flat washers:

First, the bolt often needs to be disassembled, the use of flat gaskets can be easy to disassemble; Second, when the bolt strength is high and the compressive stress ratio of the connected part is low, the use of flat washers can reduce the compressive stress of the bearing surface of the connected part; Third, in some cases, in order to make the bolt holes between the two connectors correspond one by one, we need to increase the diameter of the holes to compensate for the position deviation of the holes, and it is necessary to increase the flat washer when the bolt holes exceed the standard requirements. Fourth, sometimes in order to facilitate installation and adjustment, the bolt hole will be made into a long hole, so that the installation position of the workpiece is adjusted within a certain range, when using a long hole, it is necessary to use a thick flat washer, or use a special washer or multiple washers.

The spring washer has a good anti-loosening effect and seismic effect, the general direction of thread is right-handed, and the spiral direction of the spring washer is left-handed, after tightening the nut, the elastic reaction generated by the washer flattening causes the screwing thread to be compressed. At the same time, when the fastener assembly receives the axial force of the vibration of the bolt, due to the elastic deformation of each part after the stress, sometimes there will be a gap between the fasteners, which is easier to loose. The tip of the spring washer's diagonal against the bolt or nut and the supporting surface of the connected part can just make up for the gap between the instantaneous fasteners and prevent loosening. Spring washer is generally used in the case of low demand for bolt preload and small dynamic load. When the bolt clamping length is relatively short, the bolt stress relaxation will be more obvious, then the use of spring washers can make up for the stress relaxation.

The above is the introduction of Jinghong standard parts to the flat washers and spring washers, I hope it will be helpful to you.