13 advantages of wire thread inserts
2019-01-07 05:02:18
The wire thread insert is referred to as "silk sleeve", and it is a new thread connection element. It is made of high-strength, high-precision corrosion-resistant diamond-shaped stainless steel wire. It is shaped like a spring and is screwed into a special enlarged screw hole. A new screw hole is formed on the inner surface, and when combined with a screw (bolt), the connection strength and wear resistance can be significantly improved, particularly on low-strength materials such as aluminum, magnesium, cast iron, and plastic.
The advantages of wire thread inserts
(1) The silk sleeve is a high-precision internal and external thread concentric body. Its outside diameter is slightly larger than the diameter of the mounting screw hole in the free state, so that after the wire is set well, it can be firmly fixed in the screw hole, without taking Other fixed measures, its performance is better than the threads formed by tapping.
(2) Since the silk sleeve is made of stainless steel wire with high strength and high surface quality, the surface roughness is 0.4, which reduces the friction and wear of the screw with it, and reduces the torque generated by the friction due to the screw by 90%. Use the minimum tightening torque to obtain the maximum preloading torque and the screw tension to prevent the screw from loosening.
(3) The silk sleeve forms an elastic connection between the screw and the mounting screw hole, thereby eliminating the pitch and the shape error between the internal and external threads, so that the conformance on each thread is evenly distributed and the vibration can be reduced, thereby strengthening Internal threads enhance the bearing capacity and fatigue resistance of threaded connections. The photoelastic test shows that most of the stress is concentrated on the top few threads when the wire sleeve is not used, and only about one third of the threads bear most of the load. After the silk sleeve is used, due to the certain flexibility of the silk sleeve, the lead and angle errors of the bolt can be compensated in the loading process, and the 1-2 buckle stress of the thread close to the cross section is greatly reduced, so that the screw is not broken and the screw hole is eliminated The shear wears out, so that the load extends downwards, evenly distributed to the full length of the thread, improving the thread strength.
(4) Under the same strength conditions as common internal threads, after the silk sleeve is used, screws and base materials with smaller dimensions and higher strength can be used, because the screw sleeve greatly improves the strength of the screw hole, so that this can be saved. Case talk, reduce weight and volume.
(5) The silk sleeve can improve the sealing performance of the joint surface.
(6) Wood products and plastic products can be put into the silk sleeve to solve the weakness of these materials, thus saving a lot of metal materials.
(7) In the event of a threading error or damage, the general practice is to increase the screw hole and screw, while the use of silk sleeve as a repair means can not only quickly and economically restore the original state, and does not increase the weight and volume , Which can save the main components of the equipment, in addition, screw holes sometimes impermissible due to the shortage of imperial screws on some equipment, then use the wire thread inserts for metric conversion, very convenient and fast.
(8) The use of silk sleeves in high temperature parts can also reduce the thermal stress of parts and prevent screwed connections from being stuck or scratched.
(9) The locking type screw sleeve can lock the screw (bolt) in the threaded hole. When subjected to vibration and impact, the screw can not be loosened compared with some other commonly used locking devices (such as lock washers, springs). The washers, etc.) have excellent locking performance and can be disassembled and used repeatedly.
(10) Compared with bushings, the use of wire bushings simplifies the process and solves the problem of precision threading and assembly of the bushings. The structure is more lightweight, and there is no positional deviation between the internal and external threads, such as displacement, verticality, etc. Screw hole position accuracy.
(11) In the original design specification, after using the silk cover, the thick and thin teeth can be converted. For example, the original coarse tooth M10*1.5 can be changed to fine tooth M10*1.25 or M10*1 without any other structure change and no trace of repair.
(12) The pitch is 1.5mm. The specification of the fine tooth is that the size can be reduced by directly inserting the bush. For example: M14*1.5 can be changed to M12*1.5, and the reloading sleeve can be changed to M10.
(13) Since the material of the silk sleeve is a heat-resistant, corrosion-resistant, high-quality stainless steel, it is possible to prevent occurrence of defects such as embroidering, seizing, and scratching of the threaded connection.
The advantages of wire thread inserts
(1) The silk sleeve is a high-precision internal and external thread concentric body. Its outside diameter is slightly larger than the diameter of the mounting screw hole in the free state, so that after the wire is set well, it can be firmly fixed in the screw hole, without taking Other fixed measures, its performance is better than the threads formed by tapping.
(2) Since the silk sleeve is made of stainless steel wire with high strength and high surface quality, the surface roughness is 0.4, which reduces the friction and wear of the screw with it, and reduces the torque generated by the friction due to the screw by 90%. Use the minimum tightening torque to obtain the maximum preloading torque and the screw tension to prevent the screw from loosening.
(3) The silk sleeve forms an elastic connection between the screw and the mounting screw hole, thereby eliminating the pitch and the shape error between the internal and external threads, so that the conformance on each thread is evenly distributed and the vibration can be reduced, thereby strengthening Internal threads enhance the bearing capacity and fatigue resistance of threaded connections. The photoelastic test shows that most of the stress is concentrated on the top few threads when the wire sleeve is not used, and only about one third of the threads bear most of the load. After the silk sleeve is used, due to the certain flexibility of the silk sleeve, the lead and angle errors of the bolt can be compensated in the loading process, and the 1-2 buckle stress of the thread close to the cross section is greatly reduced, so that the screw is not broken and the screw hole is eliminated The shear wears out, so that the load extends downwards, evenly distributed to the full length of the thread, improving the thread strength.
(4) Under the same strength conditions as common internal threads, after the silk sleeve is used, screws and base materials with smaller dimensions and higher strength can be used, because the screw sleeve greatly improves the strength of the screw hole, so that this can be saved. Case talk, reduce weight and volume.
(5) The silk sleeve can improve the sealing performance of the joint surface.
(6) Wood products and plastic products can be put into the silk sleeve to solve the weakness of these materials, thus saving a lot of metal materials.
(7) In the event of a threading error or damage, the general practice is to increase the screw hole and screw, while the use of silk sleeve as a repair means can not only quickly and economically restore the original state, and does not increase the weight and volume , Which can save the main components of the equipment, in addition, screw holes sometimes impermissible due to the shortage of imperial screws on some equipment, then use the wire thread inserts for metric conversion, very convenient and fast.
(8) The use of silk sleeves in high temperature parts can also reduce the thermal stress of parts and prevent screwed connections from being stuck or scratched.
(9) The locking type screw sleeve can lock the screw (bolt) in the threaded hole. When subjected to vibration and impact, the screw can not be loosened compared with some other commonly used locking devices (such as lock washers, springs). The washers, etc.) have excellent locking performance and can be disassembled and used repeatedly.
(10) Compared with bushings, the use of wire bushings simplifies the process and solves the problem of precision threading and assembly of the bushings. The structure is more lightweight, and there is no positional deviation between the internal and external threads, such as displacement, verticality, etc. Screw hole position accuracy.
(11) In the original design specification, after using the silk cover, the thick and thin teeth can be converted. For example, the original coarse tooth M10*1.5 can be changed to fine tooth M10*1.25 or M10*1 without any other structure change and no trace of repair.
(12) The pitch is 1.5mm. The specification of the fine tooth is that the size can be reduced by directly inserting the bush. For example: M14*1.5 can be changed to M12*1.5, and the reloading sleeve can be changed to M10.
(13) Since the material of the silk sleeve is a heat-resistant, corrosion-resistant, high-quality stainless steel, it is possible to prevent occurrence of defects such as embroidering, seizing, and scratching of the threaded connection.
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