Automotive Service Home Tools factory

the tightening Automotive Service Home Tools factory needs to overcome the friction torque of the tightening end face, the friction torque of the thread pair, the elastic deformation torque of the connected parts, etc., before the remaining part is converted into the clamping force. Therefore, under the same conditions of use, the key factors that determine the tightening force should be the structure and essential quality of the thread itself, such as structure, material, heat treatment, surface treatment, quality control, etc. It can be seen that the failure of fasteners is mainly manifested in loosening, adhesion, deformation

, de-threading, and fracture, resulting in inadequate fixation, disassembly, damage of the connected parts, and even traffic accidents, causing personal injury and property damage, such as the front part of the drive shaft. Falling off, the front end of the vehicle is supported on the ground and the vehicle is overturned, and the steering spline shaft bolt falls off to cause steering failure, etc.

Fasteners are seemingly inconspicuous small parts in automobile structure, but fastener assembly is the main work of vehicle assembly, and the variety and quantity are an important factor that affects the assembly of the entire vehicle. It should not be underestimated. 3. Comparison of several kinds of lock nuts for automobiles

3.1 Ordinary hexagon head nuts Ordinary hexagon head bolts and nuts are produced in large quantities, with mature technology and low cost. They will still be the mainstream of automobile fasteners. Over the years, many fastener manufacturers have been committed to the study of thread loosening, and have also made special analysis on the loosening of ordinary hexagonal bolts and nuts, focusing on the analysis of the factors affecting the pre-tightening force of ordinary hexagonal head nuts in the manufacturing process. , 

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