Preparation of a titanium alloy outer ring self-lubricating spherical plain bearing by a two-step extrusion forming process

Abstract

Self-lubricating spherical plain bearing is a key component widely used in aerospace eld. The spherical plain bearing made of titanium alloy has lighter weight and better corrosion resistance. In order to manufacture the outer ring of self-lubricating spherical plain bearing with titanium alloy, a two-step extrusion forming process was proposed. Taking GE15DE1TK spherical plain bearing as an example, the nite element simulation model of the forming process was established, the forming test was carried out, and the outer ring of self-lubricating spherical plain bearing made by TC4 titanium alloy was successfully prepared. The results show that the forming defects such as over extrusion and insu cient extrusion can be improved by optimizing the die structure, the size of outer ring blank and the lubrication conditions.The forming parameters for GE15DE1TK spherical plain bearing are given. The prepared spherical plain bearing can be used directly without other processes to correct no load rotational breakaway torque.

Study on the tribological performance of self-lubricating thrust ball bearings with different embedded features

“…Using special lubrication methods or additives can effectively reduce the friction coefficient and friction losses of rolling bearings, providing good lubrication effects and prolonging the service life of bearings. Among these, materials such as solid paraffin (Dawari et al , 2022), hydrogenated diamond-like carbon coatings (Zhou et al , 2022), titanium alloys (Zhao et al , 2022a), self-lubricating polymer composites (Rodiouchkina et al , 2022; Zhao et al , 2022b), molybdenum disulfide and its composites (Yang et al , 2023; Gokce et al , 2021; Yang et al , 2022; Bhardwaj et al , 2021), polytetrafluoroethylene (PTFE) composites (Gungor and Demirer, 2022; Beckford et al , 2011; Deleanu and Georgescu, 2015; Feng et al , 2021; Lin et al , 2021; Trabelsi et al , 2016), graphene materials (Jin et al , 2023; Mao et al , 2018; Wu et al , 2021a; Jin et al , 2021) and alumina (Al 2 O 3 ) composites (Zhang et al , 2016; He et al , 2020; Tong et al , 2022) have demonstrated excellent anti-wear performance and tribological characteristics. However, the method of storing composite solid lubricants in bearing grooves has yet to receive attention.…”