Abstract
In order to predict pressing quality of precision press-fit assembly, press-fit curves and maximum press-mounting force of press-fit assemblies were investigated by finite element analysis (FEA). The analysis was based on a 3D Solidworks model using the real dimensions of the microparts and the subsequent FEA model that was built using ANSYS Workbench. The press-fit process could thus be simulated on the basis of static structure analysis. To verify the FEA results, experiments were carried out using a press-mounting apparatus. The results show that the press-fit curves obtained by FEA agree closely with the curves obtained using the experimental method. In addition, the maximum press-mounting force calculated by FEA agrees with that obtained by the experimental method, with the maximum deviation being 4.6%, a value that can be tolerated. The comparison shows that the press-fit curve and max press-mounting force calculated by FEA can be used for predicting the pressing quality during precision press-fit assembly.
Highlights
The pressing quality of press-fit assembly is extraordinarily important in all its application, especially in aviation and aerospace industry; quality prediction is crucial
Zhao et al [3] implemented numerical simulation and experimental research on knurl interference connection; the relationship between interference value and maximum transferred torque moment was studied; the results showed that the relationship obtained from finite element analysis (FEA) is similar to these results obtained from experiment
The purpose of this paper is to verify the accuracy of the press-fit curves and maximum press-mounting forces obtained from FEA by comparing them with experimental results, in order to determine whether press-fit curves and maximum press-mounting force that are established on the basis of the results obtained from FEA can be considered reasonably accurate and whether the pressing quality of a press-fit assembly can be judged according to these two indicators
Summary
The pressing quality of press-fit assembly is extraordinarily important in all its application, especially in aviation and aerospace industry; quality prediction is crucial. Benuzzi and Donzella [1] presented a new method to predict pressfit curve The accuracy of this method can satisfy precision requirements. Xiao et al [2] developed a software to judge automatically whether press-fit curves of wheelsets are qualified or not, and it was demonstrated that the successful rate when using that software could reach 99.4% Lu et al [5] studied the influence of the crank radius of mechanical linkage servo presses on displacement curves, velocity curves, and acceleration curves for high-speed precision press mounting by using an ADAMS software. The lateral force of the slider would be reduced with every increase of working angle It can only be utilized for high-speed precision presses, rather than typical low-speed precision presses
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