Washer is a common part to prevent bolt locking. It is widely used. Generally, we can see the shadow of washer where there are fasteners. One of the more commonly used is a kind of washer - flat washer. Let's take a look at the role and selection criteria of flat washers with Haian washer manufacturers!
Function of flat washer:
1. Increase the contact area between the screw and the machine.
2. Eliminate the damage to the machine surface caused by the spring pad when removing the screw.
3. But it is often used as a supplementary pad or flat pressing pad.
When in use, the spring pad must be a flat washer, the flat washer is next to the machine surface, and the spring pad is between the flat washer and the nut. The flat washer is used to increase the force bearing surface of the screw. In order to prevent the screw from loosening, the spring pad plays a certain buffer protection role when stressed. Although flat washers can be used as sacrificial pads.
How to choose a flat washer?
The flat washer is used as a part to prevent the bolt and nut from locking. Where fasteners are used, flat washers will be used. How to choose a suitable flat washer?
The flat washer is mainly used to enlarge and fasten the contact area between screws and some large equipment. When using the flat washer, it is often suitable for the mutual cooperation of nuts and nuts. When storing the flat washer, it must have the necessary important characteristics within the most effective sealing time:
1. The flat washer should be sealed in a bad environment. When a certain temperature and pressure is working, it is not easy to leak.
2. When the flat washer is connected with the contact surface, it is necessary to better ensure the tightness, just like the just good effect.
3. When the gasket receives pressure, under the influence of temperature, the anti wrinkle ability should be better, otherwise the screw will be damaged and hard gas leakage will occur.
4. Do not get infected when using flat washers.
5. The use of flat washers can be well disassembled, which is the greatest function of selecting flat washers.
6. Keep in mind that when using flat washers, ensure normal use at relative temperature.
In order to better use the flat washer, when selecting the flat washer, try to select the flat washer dipped with anti-corrosion and anti rust materials, which not only saves time and labor, but also plays a good role.
When used with bolts and nuts, the selection criteria of flat washers are as follows:
1. When selecting gasket materials, attention should be paid to the electrochemical corrosion of different metals. 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. Copper and copper alloy can be selected when there are conductive requirements.
2. The inner diameter of the flat washer shall be selected according to the larger diameter of the thread or screw. The connected material shall be soft (such as composite material) or matched with the spring washer, and the larger outer diameter shall be selected.
3. When the w washer is placed on the bolt or screw head, in order to avoid the interference between the fillet under the head and the washer, the flat washer ring with inner hole chamfer can be selected.
4. Steel washers shall be used for important bolts with large diameter or to increase the extrusion resistance. Steel washer shall be used for tension bolt or tension shear composite bolt connection.
5. Special gaskets shall be used for special requirements. Copper gaskets can be used for conductive parts; Available sealing gaskets with air tightness requirements.
