The difference between bolt flat pad and spring pad

Flat Pad

The flat pad is used as a part to prevent the bolt and nut from locking. Flat pad is a kind of flat washer, mainly plays a role in increasing the contact area of screws and some large equipment and fastening. When using flat pads, it is often suitable for nuts and nuts to cooperate with each other. When storing flat pads, they must be in the most effective sealing time,Have essential important features:

1. In the case of a harsh environment, it should be said that the flat pad is sealed. When a certain temperature and pressure are not easy to leak during working hours.

2. When the flat gasket is connected with the contact surface, it is necessary to better ensure the sealing performance, just like the effect is just right.

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, in the use of flat pad when not infected.

5, the use of flat pad can be very good disassembly this is the biggest role of the choice of flat pad.

6. Remember to use the flat pad to ensure normal use at the relative temperature.

   

In order to better use the flat pad, when choosing the flat pad, try to choose the flat pad impregnated with anti-rust and anti-corrosion materials, which not only saves time and effort, but also plays a good role in the flat pad.

When used with bolts and nuts, the selection criteria for flat pads:

1. When selecting gasket materials, attention should be paid to the electrochemical corrosion problem when different metals are in contact. The material of the flat pad is generally the same as the material of the connector, usually steel, alloy steel, stainless steel, aluminum alloy, etc. Copper and copper alloys can be used when there is a conductive requirement.

2. The inner diameter of the flat pad is selected according to the larger value of the thread or screw diameter, and the connected material is softer (such as composite material) or the outer diameter of the spring washer should be selected with a larger value.

3. When the W washer is placed under the bolt or screw head, in order to avoid interference between the rounded corner of the head and the washer, a flat washer with chamfer of the inner hole can be selected.

4, the larger diameter of the important bolts, or in order to increase the anti-extrusion ability, should be used steel washers. Steel washers shall be used for tension bolted or tension-shear composite bolted connections.

5. Special gaskets shall be applied to parts with special requirements, such as copper gaskets that need to be conductive; available gaskets with air tightness requirements, etc.

the role of flat pad:

1. Increase the contact area between the screw and the machine.

2. Eliminate the damage to the surface of the machine when the spring pad is removed. When using must be: spring pad a flat pad, flat pad next to the surface of the machine, spring pad between the flat pad and nut. The flat pad is to increase the force surface of the screw. In order to prevent the screw from loosening, the spring pad plays a certain amount of buffer protection when the force is applied. Although flat pads can be made sacrificial pads.

3, but more often it is used as a supplementary pad or flat pad.

Advantages:

① By increasing the contact area, parts can be protected from damage;

② By increasing the contact area, the pressure between the nut and the equipment is reduced, thereby playing a protective role.

Disadvantages:

The flat washer can not play the role of seismic;

The flat washer also has no anti-loose effect.

 

Pad

The role of the pad

1、The function of the spring washer is to tighten the nut, and the spring washer gives the nut an elastic force to tighten the nut so that it is not easy to fall off. The basic function of the spring is to give a force to the nut after the nut is tightened again, increasing the friction between the nut and the bolt.

2. Flat pads are generally not used with spring pads (flat pads and spring pads are only considered when protecting the surface of fasteners and installation surfaces).

3. Flat pads are generally used in connectors. One is soft and the other is hard and brittle. Its main function is to increase the contact area, disperse the pressure, and prevent the soft texture from being crushed.

Advantages:

① The spring washer has good anti-loose effect;

The spring washer has a good seismic effect;

Low manufacturing cost;

The installation is very convenient.

Disadvantages:

Spring washers are greatly affected by materials and processes. If materials are not good, heat treatment is not well grasped, or other processes are not in place, cracking is prone to occur. Therefore, reliable manufacturers must be selected.