Investigation on the uncertain factors of the elastic–plastic contact characteristics of the planetary roller screw mechanism

Abstract

The scatter of uncertain factors of the planetary roller screw mechanism, which originated from the manufacturing process, has a significant influence on its serving performance. However, this influence remains insufficiently studied. Further, the elastic–plastic contact analysis of the planetary roller screw mechanism with considering the uncertainties needs large numbers of repetitive calculations by traditional finite element method, which is labor intensive and often impractical. In this paper, an uncertain model of the planetary roller screw mechanism, including parameterization and finite element calculation, is established to conduct the elastic–plastic contact analysis automatically. Besides, the finite element method results can be also obtained automatically with the self-compiled flow program and the secondary development platform using the design of experiment method. Then, a mathematic model is applied to value the influence of the uncertain factors on the contact characteristics. The Pareto graphs are plotted to clearly show this sequence of the percent effects of all the uncertain factors. The present work, for the first time, developed an automatic modeling method for analyzing efficiently the uncertain factors of planetary roller screw mechanism, which is worthy in industrial application.

Review on errors and transmission characteristics of the planetary roller screw mechanism

“…Based on the elastic contact deformation, Yao et al, 55 Ma et al, 56 Fu et al 57 derived the influence of different parameters on the motion performance with deformation errors, which are contact characteristics, working loads, preload and inertia forces of PRSM. However, radial loads were not considered in any of the above literature.…”

A roller taper modification method for load distribution optimization of planetary roller screw mechanism

“…Similarly, the optimal grinding angle on the screw-roller interface is 0.014°. According to the study Yao et al (2019), the load-carrying capacity of the screw-roller interface is much lower than that of the nut-roller interface, and the screw-roller interface is generally more prone to failure. Therefore, load distribution on the screw-roller interface should be guaranteed as a priority.…”

A review of planetary roller screw mechanism for development and new trends

“…The calculation method was verified by the interference analysis of a virtual assembly model in SolidWorks. Over the following year, Yao et al 36 further proposed a mathematic model to investigate the impact of uncertainties including geometry structure, material parameters, and axial loads on the contact characteristics. The elastic–plastic contact characteristic was obtained automatically by the iterative finite element method.…”