The accuracy of the white drywall screws also affects the actual assembly effect. For example, the accuracy error of the pneumatic tool is ±50%. When the tightening torque is at the lower limit, the pre-tightening force may be insufficient; c. The friction coefficient of the bolt is not specified, and the consistency of the product quality is not strict.
Control, may be due to product quality or friction coefficient fluctuations, resulting in insufficient axial preload when tightening to the specified torque, causing loosening; d. Abnormalities in the actual assembly process, such as foreign matter such as iron filings on the thread or supporting surface, will also cause False connection, the torque meets the requirements,
but the actual pre-tightening force does not meet the requirements, this situation mostly occurs during the torque method assembly; e. When multiple bolts are used together, there should be requirements for the assembly sequence and assembly steps, such as simple assembly , It may produce partial torque on the final assembled bolt, and many factors may cause the bolt to fail.
For an aircraft, weight is very important, reducing weight can not only save costs, but also increase the load of tourists. Do you believe that the use of fasteners to reduce weight can reach hundreds of kilograms or more? Of course. The following China Standard Parts Network will share some methods for weight reduction of fasteners, and see how much weight can the fasteners lose when reducing the weight of an aircraft? Fastener weight reduction methods 1.
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