空心薄壁螺纹结构的拧紧力矩分析OACHSSCDCSTPCD

The hollow thin-wall thread structure is a common fastening structure applied in the assembly of min-iaturized components.To study its mechanical properties,a finite element model of a specific hollow thin-wall thread structure was established,and a simulation analysis of the tightening torque was conducted.The influ-ence of the preload torque was considered,and the distribution of contact stress and strain on the threaded sur-face during the tightening process was studied,along with the effect of different materials on the maximum tight-ening torque that the hollow thin-walled threads can withstand.The maximum tightening torque that the struc-ture can endure was obtained,with an error of about 1.5% compared to experimental results.The study found that the maximum tightening torque remains approximately unchanged under different preload torques,and when the material of the external threaded component is beryllium bronze C17300Y and the internal threaded component is stainless steel S30408,the hollow thin-walled threaded structure can withstand the maximum tightening torque.The calculation results elucidate the reasons for the fracture failure of the hollow thin-walled threaded structure during the tightening process,providing certain theoretical guidance for the design of hollow thin-walled threaded structures.