How to prevent Steel Bolt from locking?

From the perspective of the development of the entire manufacturing industry, the Fastening System usually accounts for only a small part of the entire product structure, but as an organic part of the product, it plays an important role. From the perspective of the application of the world's fastening standard parts, the industry mainly includes the electronics industry, maintenance and construction industry, and the automobile industry as the three major users of fasteners. For example, there are many types of automotive fasteners, which are mainly divided into four categories, including standard fasteners, non-standard fasteners, standard mechanical components and non-standard mechanical components; of which non-standard fasteners have high quality requirements. Among non-standard fasteners, engine connecting rod bolts, flywheel bolts, wheel bolts, suspension bolts, etc., because of their high quality and good stability requirements, China has not been able to meet domestic requirements, and a small part depends on imports.
Steel Bolt
Steel Bolt encounters condensate in polluted air. Pollution refers to containing a large amount of sulfide or carbon oxide. When it encounters water, it will form sulfuric acid and hydroxide, which will chemically corrode steel bolts. Steel bolts will rust because the protective film of stainless steel is damaged, stainless steel is oxidized, and the ability to resist rust is weakened, so steel bolts will also rust.
The problem of steel bolt locking is one of the problems encountered in the use of screws. How to solve the problem of steel bolt locking, Huashen Olympic Standard Parts simply listed the following solutions for everyone.
1. When first selecting the stainless steel nut used with the steel bolt, select the matching connector product.
2. The tensile strength of the steel bolt and the load of the supporting nut must meet the mechanical properties of the object.
2. When using steel bolts, pay attention to check whether the screw threads are complete and whether there are residues or stains.
3. Lubrication can be applied to fasteners before use. It is recommended to use butter, molybdenum disulfide, mica, graphite or talc for lubrication. At present, wax treatment is commonly used to prevent lubrication from locking up.
4. Don't operate steel bolts too fast or too hard.
5. The use of washers can effectively prevent the problem of over-tightening.
Today, advanced manufacturing represented by large aircraft, large power generation equipment, automobiles, high-speed trains, large ships, and large complete sets of equipment has entered an important direction of development. As a result, fasteners will enter an important stage of development. High-strength bolts are used for the connection of important machinery. Repeated disassembly or various torque methods require high-strength bolts. Therefore, the surface condition and the accuracy of the thread will directly affect the life and safety of the host. In order to improve the friction coefficient and avoid rust, seizure or jamming during use, the technical requirements stipulate that the surface should be nickel-phosphorus plated. The thickness of the coating is guaranteed within the range of 0.02 to 0.03mm, and the coating is uniform, dense, and free of pinholes.
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