Precision assembly method of a kind of small interference fitting parts

Lou, Zhifeng; Wang, Xingyuan; Wang, Yue; Xu, Chonglin; Wang, Zhize

doi:10.1007/s12046-019-1129-6

Cited by 4 publications

(2 citation statements)

References 11 publications

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“…They are commonly used for heavy machinery and general machinery that can carry a heavier load, as they provide a solid connection that may require significant force or potential machine operations to separate them, making press-fit more advantageous than key or pin connections [7]. They have excellent load-bearing ability under both static and dynamic loading conditions, so have been used in many engineering fields [8]. Since there are no additional fasteners, these connections are also simple and quick to make, and therefore relatively inexpensive.…”

Section: Introductionmentioning

confidence: 99%

Effect of Interference Size on Contact Pressure Distribution of Railway Wheel Axle Press Fitting

Irena,

Lemu,

Kedir

2023

Designs

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Mechanical couplings in engineering usually use interference fits to connect the shaft and hub. A railway wheel axle is a press fit that is connected by interference and can be subjected to bending stress. In loaded press fits, a high concentration of contact stresses can be generated in the area of the axle-fillet beam, which in most cases leads to the failure of the axle due to fatigue and fretting fatigues. Therefore, it is crucial to determine the ability of the press-fitted joints to provide sufficient frictional resistance that can withstand the loads and torques by evaluating the safety factor, especially when the mechanical or structural system is loaded. In this paper, the contact pressure and stress distribution along the radius of the wheel axle are studied using the analytical calculation of Lame’s equation, and the numerical method used is by ANSYS software. It was found that interference fits have a great influence on the connection strength of interference fits, which are directly related to the contact pressure. Increasing the interference increases the contact pressure, which allows higher torque and load capacity to be transmitted. The finite element analysis showed good agreement for the highest interference value of 230 µm with a relative error of 1.4%, while this error increased to the maximum relative error of 14.33% for a minimum interference of 100 µm.

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Section: Introductionmentioning

confidence: 99%

Effect of Interference Size on Contact Pressure Distribution of Railway Wheel Axle Press Fitting

Irena,

Lemu,

Kedir

2023

Designs

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“…For these components, both the stress distribution and the pressing force during assembly are affected by the assembly sequence. 2 However, this interesting phenomenon has rarely been studied.…”

Section: Introductionmentioning

confidence: 99%

Press-fit analysis of multilayer interference fit

Wang

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Multilayer interference fits are widely used in the machinery industry, and their performance is closely related to assembly quality. Press-fit is the primary assembly method. The pre-deformation of the previous assembly step can significantly affect the stress distribution (stress concentration) and pressing force in subsequent assembly steps. Therefore, the wear degree of the contact interface and the assembly quality of the components are affected by the assembly sequence. The multilayer thick-walled cylinder theory (MTCT) cannot realize the accurate analysis of stress distribution and pressing force during assembly. Therefore, this paper optimizes the MTCT considering the resistant force generated by the non-contact regions and proposes an assembly matrix generation algorithm and an assembly sequence optimization algorithm. Compared with the simulation analysis, the optimized theoretical model can be used for the analysis of the stress distribution and pressing force of multilayer interference components. The analysis accuracy is significantly improved compared with MTCT. The optimal assembly sequence determined by the proposed algorithm is consistent with simulation results.

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