The Best Solution to Loose Threaded Fasteners

July 26, 2023

Threaded wire sleeve (steel wire screw sleeve) is a new type of threaded fastener, which is a spring-shaped concentric body with internal and external threads that is precisely processed by high-precision diamond-shaped stainless steel wire. If the thread wire set is finished, it can meet the international standard high-precision internal thread, and its performance is better than that of the thread formed by tapping. main application 1 It can form high-strength, wear-resistant and high-precision standard internal threads on mechanical parts loaded with metal or non-metal materials (such as aluminum, magnesium and other light alloy engineering materials). Typical applications: high-voltage switchgear, hydraulic machinery, welding equipment, tobacco machinery, microwave communication, auto parts, air separation equipment, coal machinery, power machinery, textile and chemical fiber machinery, etc. 2 When the thread processing is wrong or the damaged internal screw hole is repaired, the threaded thread sleeve (wire threaded sleeve) can be used as a repair method, which can be repaired quickly and effectively Typical application: repairing of threaded holes of various important parts after tripping, such as: repairing of threaded holes of injection molding machine templates. 3 It is very convenient and fast to use threaded sleeves to convert metric ←→ inch threaded holes. Typical application: Imported equipment or mechanical inch threads need to be changed to metric threads due to spare parts supply problems.

What are the precautions for installing steel structure bolts?
Bolts are connecting parts of steel structures. According to the bearing capacity, they can be divided into ordinary bolts and high-strength bolts. The following Wuhan Xiaxiang Industry and Trade Co., Ltd. will introduce the precautions in the construction of steel structure bolts. ??1. Spring washers should be placed according to the design requirements for dynamic loads or bolted connections of important parts, and the spring washers must be set on the nut side. ??2. The installation of high-strength bolts should be able to penetrate the holes freely, and forcible penetration is strictly prohibited. The hole diameter of the high-strength bolted steel plate is slightly larger than the bolt diameter, and must be formed by drilling. ??3. High-strength bolt regular connection forms are usually divided into friction connection, tension connection and pressure connection. Among them, friction connection is the basic connection form widely used at present. ??4. The installation sequence of high-strength bolts: it should be carried out from the part with high rigidity to the unconstrained free end. For high-strength bolts on a joint, the initial tightening, retightening, and final tightening should start from the middle of the bolt group and expand to the surroundings one by one. Each tightening should be marked with different colors of paint to prevent leakage. The initial tightening, retightening, and final tightening of high-strength bolts in the same joint should be completed within 24 hours. If there is no specified design, it should be carried out according to the construction process sequence of fastening high-strength bolts first and then welding (that is, first bolting and then welding).

What is the installation method of steel structure bolts
1. The penetration direction of steel structure bolts is subject to the convenience of construction, and each node should be neat and consistent. After the high-strength bolts are penetrated and tightened with a wrench, the temporary bolts are removed and replaced with high-strength bolts. ??2. The fastening of high-strength bolts must be carried out twice. The first time is the initial tightening: the initial tightening is tightened to 60% to 80% of the standard axial force of the bolt (that is, the design pre-tension). The second fastening is the final tightening, and the torsional shear type high-strength bolts should unscrew the torx chuck during the final tightening. ??3. After the hoisting completes a construction section and the steel structure forms a stable frame unit, start to install high-strength bolts. ??4. When installing high-strength torsional shear bolts, pay attention to the direction: the washer of the bolt is installed on the side of the nut, and the chamfered side of the washer hole should be in contact with the nut. ??5. The bolts that have been screwed initially should be marked for confirmation. In order to prevent missing screwing, the high-strength bolts installed on the same day should be finally screwed on the same day. ??6. Both the initial tightening and the final tightening should be fastened from the middle of the bolt group to the surrounding symmetrically. ??7. Due to the narrow space, high-strength bolt wrenches are not suitable for operating parts, and can be installed with heightened casing or manual wrench. ??8. The torsional shear type high-strength bolts should be completely unscrewed with the torx chuck at the tail to complete the final screwing, and no omission is allowed.

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