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Introduction to the advantages of nuts

July 20, 2023

Introduction to the advantages of nuts


When tightening the thread of the locknut, firmly insert the thread of the anchor bolt into the clamped 30° wedge slope, and increase the normal force formed on the wedge slope to the axis of the anchor bolt. Clamped at 60 degrees. The angle of view is not 30°, so the normal force when tightening the locknut is much higher than that of the general standard nut, and it has good locking and vibration resistance. The lock nut is a kind of nut with high locking performance, which can work normally even under severe conditions. Generally speaking, lock nuts have three advantages: 1. Wear resistance and cutting resistance: The 30° slope at the bottom of the nut thread makes the nut locking force evenly distributed on all threads on each tooth. Due to the uniform pressure distribution on the thread surface of each tooth, the nut can more effectively solve the problems of thread damage and cutting deformation. 2. Excellent vibration resistance: After the screw is tightened, the thread of the anchor bolt thread is firmly inserted into the 30° wedge angle of the nut and clamped, and the normal force formed on the wedge angle is as follows. Vino. It is the same as increasing the normal force on the wedge slope. The centerlines of the anchor bolts are at a 60° angle instead of 30°, so the normal force caused by tightening the nut is much higher than the normal force. Standard nut with good fastening and shockproof properties. 3. Good reusability. If the dose is large, even if the nut is repeatedly tightened and disassembled, the locking force will not decrease, and the previous locking effect can be maintained. Locknuts have good corrosion and cut resistance. The bottom end of the thread of the locknut is skewed by 30 degrees, so there is a working pressure on each thread, so the locking force of the nut is evenly distributed on any tooth thread. Due to the uniform surface distribution, locknuts can more effectively solve the problems of screw damage and cutting deformation.


The method of preventing slipping and loosening of nut standard parts


Nut standard parts are mainly divided by the threads on the inside. Nut standard parts are screw caps, which are screwed together with nuts or bolts for tightening parts. All manufacturing machinery must use a copy. Nut standard The parts are the parts that connect the gaps of industrial equipment. Only through the threads on the inside, locknuts and screws of the same specification and model can be connected together. Below, maijin will introduce in detail the two ways to prevent the standard parts of the nut from slipping. Mechanical anti-loosening The relative rotation of the lock nut pair should be directly limited by the stopper of the lock nut standard part. Such as the selection of hard-to-open pins, series stainless steel wires and stop washers, etc. Because the lock nut stopper has no axial force, the tightening of the stopper can only play a role when the standard part of the clamp nut is loose and returns to the stop position. Therefore, in practice, the lock nut is not tightened but is Prevent zero drop. Riveting and anti-loosening After tightening, methods such as punching, electric welding, and bonding are used to make the clamp nut standard part lose the characteristic of the kinematic pair and the connection becomes an inseparable butt joint. The disadvantage of this method is that the bolt rod can only be used once, and it is very difficult to disassemble, and it is necessary to damage the standard part of the nut. The heat treatment process has a very important impact on the structural quality of high-toughness fasteners. Therefore, if you want to manufacture high-quality and fasteners, you should have cutting-edge heat treatment equipment. Because the output of high-strength bolts is very large, the quality is low, and the thread part is relatively thin and the structure is accurate, so the heat treatment equipment should have a relatively large production capacity and a relatively high level of automation. Good heat treatment quality level. Cleaning-heating-heat treatment-cleaning-tempering-discoloration and coloring of high-tenacity fasteners from the supply, all automatic control systems are actually operated to effectively ensure the quality of heat treatment. Threaded fasteners may cause carburization. When the physical performance standards are not met, a trip will occur first, which will invalidate the threaded fasteners and reduce the service life. Due to the carburization of the raw material, if the quenching is unreasonable, the decarburization layer of the raw material will be aggravated. In the process of heat treatment and tempering heat treatment, some air oxidation gas is generally introduced from the outside of the furnace.

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