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The function and selection criteria of flat washers

by:Tronshal     2022-03-13
Washers are a common part to prevent bolts from locking. They are widely used. Generally, where there are fasteners, we can see the shadow of washers. One of the most commonly used is a flat washer. Let's take a look at the function and selection criteria of flat washers together with the hai'an washer manufacturers! The function of the flat washer: 1. Increase the contact area between the screw and the machine. 2. Eliminate the damage to the surface of the machine when the spring washer is unloading the screw. 3. But more often it is used as a supplementary pad or a flat pressure pad. When used, it must be: a spring washer - a flat washer, the flat washer is next to the machine surface, and the spring washer is between the flat washer and the nut. Flat washers are used to increase the bearing surface of the screw. In order to prevent the screw from loosening, the spring washer provides a certain amount of buffer protection when it is stressed. Although flat washers can make sacrificial pads. How to choose a flat washer? Flat washers are used as a part to prevent bolts and nuts from locking. Flat washers are used wherever fasteners are used. How to choose a suitable flat washer? Flat washers are mainly used to increase and tighten the contact area between screws and some large equipment. When using flat washers, it is often suitable for nuts and nuts to be used together. When storing flat washers, they must be in the most effective way. During the sealing time, there are necessary and important characteristics: 1. In the case of a harsh environment, the flat gasket should be sealed. When a certain temperature and pressure are in operation, it is not easy to leak. 2. When the flat gasket is connected to the contact surface, it is necessary to better ensure the sealing, just like the effect. 3. Under the influence of temperature when the gasket is under pressure, the anti-wrinkle ability is better, otherwise the screw will be damaged, and there will be hard gas leakage. 4. Do not get infected when using flat washers. 5. The use of flat washers can be well removed. This is the biggest effect of choosing flat washers. 6. Remember to ensure normal use at relative temperatures when using flat washers. In order to better use the flat washer, when choosing a flat washer, try to choose a flat washer dipped in rust-proof and anti-corrosion material, which not only saves time and effort, but also plays a very good role in the flat washer. When used with bolts and nuts, the selection criteria for flat washers: 1. When selecting the washer material, attention should be paid to the electrochemical corrosion problem when different metals are in contact. The material of the flat washer is generally the same as that of the connected parts, usually steel, alloy steel, stainless steel, aluminum alloy, etc. When electrical conductivity is required, copper and copper alloys can be selected. 2. The inner diameter of the flat washer should be selected according to the larger diameter of the thread or screw, and the outer diameter should be larger if the material to be connected is soft (such as composite material) or matched with the spring washer. 3. When choosing to place the W washer under the bolt or screw head, in order to avoid the interference between the fillet under the head and the washer, a flat washer with an inner hole chamfer can be selected. 4. For important bolts with larger diameters, or in order to increase the anti-extrusion capacity, steel washers should be used. Tension bolts or tension-shear composite bolt connections shall use steel washers. 5. Special gaskets are used for special requirements. For example, copper gaskets can be used for electrical conductivity; sealing gaskets can be used for air tightness requirements.
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