Release time：2020-01-16 18:44 Browse：
In the broad field of industrial production and mechanical equipment maintenance, lengthened hexagonal flange screws, as a common fastener, play a pivotal role. They not only carry the stability of equipment structure, but also directly relate to the safety and efficiency of equipment operation. Therefore, how to correctly tighten the lengthened hexagonal flange screws, effect monitoring and daily maintenance is a key skill that every engineer and technician must master. This paper will elaborate from three aspects: fastening technology, effect monitoring method and maintenance strategy.
Fastening technology of lengthening hexagonal flange screws
1. Use the right tools
First, make sure to tighten with an Allen wrench or torque wrench that matches the screw specifications. The hex wrench should be able to stably fit the hex head of the screw to avoid slipping or damage. The torque wrench can precisely control the tightening torque to prevent safety hazards caused by too tight screw breakage or loosening.
2. Correct tightening sequence
For occasions where multiple screws need to be tightened at the same time, the principle of cross-tightening should be followed, that is, pre-tightening diagonally and then tightening evenly step by step until a predetermined torque value is reached. This method helps to ensure that each screw is stressed evenly, avoiding deformation or breakage due to local stress concentration.
3. Ensure a reasonable tightening torque
Each screw has its recommended tightening torque range, which is usually provided by the manufacturer. In actual operations, tighten the cables strictly within this range to avoid damage caused by excessive torque or loosening caused by insufficient torque. For screws of key components, it is recommended to use a torque wrench for precise control.
Second, fastening effect monitoring method
2.1 Visual inspection
After the completion of fastening, the first visual inspection is carried out to observe whether the screw is completely tightened, whether the head is closely fitted to the flange surface, and whether there is obvious dislocation or tilt. At the same time, check whether there is extrusion deformation or crack of the material caused by too tight around the screw.
2.2 Vibration Analysis
The vibration analyzer is used to monitor the equipment, and the tightening state of the screws can be indirectly assessed by analyzing the vibration frequency and amplitude of the equipment during operation. Abnormal vibration often indicates screw loosening or other fastener failure, and timely measures should be taken to deal with it.
2.3 Ultrasonic Detection
Ultrasonic inspection technology can penetrate the surface of the material to detect internal defects and loosening. For parts that are difficult to directly observe, such as screws buried deep in the structure, ultrasonic inspection provides an effective non-destructive means of monitoring.
Third, maintenance and maintenance strategy
3.1 Periodic retightening
Because the equipment will be subjected to various forces during operation, the screws may gradually loosen. Therefore, a regular tightening plan should be developed to periodically check and re-tighten the screws in key parts to ensure that they are always in a good tightening state.
3.2 Lubrication and rust prevention
Proper lubrication can reduce the friction resistance of screws in the fastening and disassembling process and extend the service life. At the same time, the use of appropriate anti-rust measures, such as the application of anti-rust oil or the installation of anti-rust caps, can effectively prevent the screw from failing due to rust.
3.3 Replace damaged parts
During the inspection process, once the screws are found to have cracks, serious wear or fracture and other signs of damage, they should immediately stop using and replace the new parts. Avoiding the use of damaged screws can lead to greater safety hazards.
3.4 Training and awareness raising
Strengthen the training of operators, improve their understanding of the importance of fastening elongating hexagonal flange screws, and master the correct fastening methods and monitoring skills. At the same time, establish a sound maintenance management system to ensure that all maintenance work can be effectively implemented.
In summary, the fastening effect monitoring and maintenance of lengthened hexagonal flange screws is a systematic and meticulous work. By choosing the right tools, following the right fastening techniques, using scientific monitoring methods and implementing effective maintenance strategies, we can ensure that the screws are always in good working condition, providing a strong guarantee for the stable operation of the equipment.
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