Screws are known as the industrial rice, although small but not small, especially on the high-tech objects such as aircraft rockets, the bolts must not be ignored. Once loose, the consequences are unimaginable! So how does the anti-looseness of the bolts work? The bolting of the aircraft generally has anti-loosening measures, such as fuses, split pins, fuses, safety screws, etc. The smaller pallet nuts are self-locking through the elliptical holes. The nuts are oval when not installed. It is clamped by the slot at the end of the nut. Fuse: A thin wire is used to join two or more fasteners together. When a component has a loose tendency, it will be pinned down by the fuse and will stop developing. Materials: low carbon steel, stainless steel and brass, etc., commonly used are low carbon steel wire. When it comes to insurance, it can be used in the form of single-strand or double-strand fuses. Generally, it is widely used in the form of double-twisted knots, as shown in the figure below. Single-fed fuses are commonly used for small groups of screws that are closely spaced apart or where they are difficult to reach, as shown. In general, if the threaded fasteners are clustered together, the form of interlocking insurance is much superior to the independent insurance. The number of components in a series of fuses depends on the specific situation. Cotter pin: The installation form of the split pin is as follows: safety pin: Insurance screw: In addition to this, thread self-locking is one of the most common anti-loose measures. Thread self-locking is usually achieved by a special thread form, and the pitch (tooth pitch) of the self-locking thread is small. The self-locking performance generally depends on the nut, unless the screw is particularly damaged, so the self-locking force is too small. In general, it can be solved by replacing the nut. What are the ways to prevent loose screws during work? Generally, the screw and the nut are connected with self-locking property, and will not loosen when the static load and the working temperature change little. However, under the action of shock, vibration or variable load, and when the operating temperature does not change much, the connection may be loose, affecting work and even accidents. In order to ensure a safe and reliable connection, effective anti-loose measures must be taken for the screw and nut connection. 1. The size of the specification should be selected. A slightly larger or smaller screw may be used barely at the moment, but it will loosen or lock up after a long time. 2. Special engineering plastics are processed on the screw to make the screw nut in the locking process, because the engineering plastic is squeezed to produce strong friction torque and reaction force, resulting in full tooth contact, providing absolute vibration The resistance makes the general screw become a permanent strong anti-loose screw, completely solving the loose connection between the screw and the screw. 3. Anti-loose method to increase friction. This type of anti-loose method is such that the tightened threads do not lose pressure due to changes in external loads, so there is always frictional resistance to prevent loosening of the connection. The anti-loose method for increasing the friction is to install a spring washer and use a double nut. 4. Mechanical anti-loose. This type of anti-loose method utilizes various stop parts to prevent relative rotation of the threads and parts to achieve anti-looseness. Mechanical anti-loose is more reliable, so it is used more. Common mechanical anti-loosening measures include split pin and slot nut, retaining washer and round nut, retaining washer and nut, and Shenlian wire. 5. The anti-loose method that cannot be removed. The nut can be fixed on the bolt or the connected member by means of positioning welding, point riveting, etc., and the screw can be fixed on the connected member to achieve the anti-loose effect. Floating Fountain,Floating Ball Fountain,Outdoor Resin Fountain,Outdoor Fountain Decorations Guangzhou Dewy water fountain Technology Co., LTD , http://www.dewywaterfountain.com
