How to choose the self-locking tuning screw suitable for specific equipment?
The selection of self-locking tuning screws suitable for specific equipment needs to comprehensively consider the working environment, performance requirements, installation space and cost of the equipment, so as to ensure that the selected screws can meet the requirements of stable operation and precise adjustment of the equipment. The following is a detailed introduction for you:
Considering the working environment of the equipment
Temperature and humidity: The temperature and humidity in the environment of different equipment are quite different, which has a significant impact on the performance of self-locking tuning screws. In high temperature environment, such as near industrial melting furnace and engine compartment, the self-locking tuning screw made of ordinary materials may lead to the decrease of pre-tightening force due to thermal expansion, which will loosen the screw and affect the normal operation of the equipment. Therefore, the self-locking tuning screws used in high temperature environment should be made of materials with high temperature resistance, such as stainless steel (310S, 321 and other brands) and high-temperature alloys (such as Inconel 600 and Incoloy 800). These materials can still maintain good mechanical properties and dimensional stability at high temperature, effectively preventing screws from loosening due to thermal expansion. At the same time, some high-temperature self-locking tuning screws will adopt special structural design, such as increasing the thickness of elastic washer and optimizing the thread profile, etc., to further improve the self-locking performance of screws in high-temperature environment. However, in humid environment, such as the communication base station on the seashore and the monitoring equipment of underground parking lot, the self-locking tuning screw made of ordinary metal is easy to rust, which leads to the increase of friction between the screw and the nut, and it may be difficult to twist when adjustment screw is needed. At the same time, rust will also lead to the decrease of screw strength and easy to break, thus affecting the stability and reliability of equipment. Therefore, the self-locking tuning screws used in humid environment should be made of materials with good antirust performance, such as stainless steel (brands such as 304 and 316), galvanized steel and nickel-plated steel. The oxide film or coating formed on the surface of these materials can effectively prevent moisture and oxygen from contacting with the metal, thus preventing the screw from rusting. In addition, some self-locking tuning screws used in humid environment will be coated with a layer of special protective paint, such as epoxy resin paint, polyurethane paint, etc., to further improve the anti-rust performance of the screws.
Vibration and impact: During the operation of some equipment, such as vehicles (cars, trains, airplanes, etc.), industrial production equipment (such as punching machines, crushers, vibrating screens, etc.) and construction equipment (such as concrete mixers, pile drivers, cranes, etc.), it will inevitably be affected by vibration and impact. These vibrations and shocks will cause relative motion and vibration of the internal parts of the equipment, which puts forward higher requirements for the self-locking performance of the self-locking tuning screw. If the self-locking performance of the self-locking tuning screw is insufficient, the screw will easily loosen under the action of vibration and impact, which will lead to the failure of the connection between the parts of the equipment, thus affecting the normal operation of the equipment and even causing safety accidents. Therefore, self-locking tuning screws with high self-locking performance should be selected for equipment working in vibration and impact environment. Some common designs to improve the self-locking performance include the use of special thread structures, such as triangular threads and trapezoidal threads, which can provide greater friction and effectively prevent screws from loosening. At the same time, some self-locking tuning screws will also carry out special treatment on the thread surface, such as increasing roughness and coating special coating, etc., to further increase the friction between threads and improve the self-locking performance of the screws. In addition, some self-locking tuning screws used in vibration and impact environment will also adopt the design of self-locking assisted by elastic elements, such as setting elastic elements such as spring washers and elastic snap rings in the screw head or nut. When the screw is tightened, the elastic element will be compressed or deformed, thus generating an extra clamping force or axial force on the screw. This extra force will increase the friction between the screw and the nut, effectively preventing the screw from loosening due to vibration and impact. By adopting these designs with high self-locking performance, the self-locking tuning screw can work reliably in vibration and impact environment, ensuring that the connection between parts of the equipment is always firm, thus ensuring the normal operation and safety of the equipment.
Matching equipment performance requirements
Tuning accuracy requirements: Different types of equipment have different requirements for tuning accuracy. In some high-precision electronic test equipment, such as spectrum analyzer and network analyzer, these equipment are used to accurately measure and analyze the spectrum characteristics and network parameters of electrical signals. In these devices, self-locking tuning screws are used to accurately adjust the parameters of internal circuits to ensure that the devices can accurately measure and analyze the parameters of electrical signals. Therefore, for these high-precision electronic test equipment, self-locking tuning screws are required to have extremely high tuning accuracy, which can accurately control the small changes of circuit parameters. Generally speaking, the tuning accuracy of this kind of self-locking tuning screw can reach ±0.01mm or even higher. Through this high-precision tuning, the measurement accuracy and reliability of electronic test equipment can be ensured, and the demand for high-precision electrical signal measurement and analysis in scientific research, production and other fields can be met. However, in some devices that require relatively low tuning accuracy, such as some common audio devices and smart home devices, these devices are mainly used to realize audio playback, home control and other functions. In these devices, self-locking tuning screws may be used to adjust the position of some components, such as the position adjustment of speakers in audio equipment and the position adjustment of sensors in smart home equipment. For these devices, the requirements for the tuning accuracy of self-locking tuning screws are relatively low, and the tuning accuracy of ±0.1mm-±0.5mm can generally meet the normal operation requirements of the devices. Through this relatively low-precision tuning, the cost and manufacturing difficulty of the equipment can be reduced on the premise of ensuring the performance of the equipment, and the demand of consumers for ordinary electronic equipment can be met. Therefore, when selecting the self-locking tuning screw, we should choose the self-locking tuning screw with corresponding tuning accuracy according to the specific requirements of the equipment for tuning accuracy, so as to ensure that the selected screw can meet the performance requirements of the equipment and ensure the normal operation and use effect of the equipment.
Self-locking reliability requirements: the self-locking reliability requirements of equipment for self-locking tuning screws vary according to the use scenarios and importance of the equipment. In some key equipment, such as aerospace equipment (aircraft, satellites, rockets, etc.), military equipment (radar, missiles, ships, etc.) and medical equipment (MRI equipment, CT equipment, etc.), the operational reliability of these equipment is directly related to the life safety of personnel, the security and interests of the country and the accuracy of medical diagnosis. In these devices, self-locking tuning screws are used to adjust and fix the positions and parameters of key components, such as the connection of engine components in aerospace equipment and the parameter adjustment of flight control system; Angle adjustment of radar antenna in military equipment and fixed parameters of missile launching system; Parameter adjustment of RF coil of MRI equipment in medical equipment, position fixing of X-ray tube of CT equipment, etc. Therefore, for these key equipments, the self-locking tuning screws are required to have extremely high self-locking reliability, which can withstand the influence of various complex working conditions and environmental conditions throughout the service life of the equipment, always maintain reliable self-locking performance, prevent the screws from loosening, and ensure that the positions and parameters of key components are always stable, thus ensuring the normal operation and safety of the equipment.
