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.