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Modeling and analysis of tangential force in robot abrasive belt grinding of nickel‑based superalloy

Zhang Weijian, Gong Yadong, Zhao Xianli, Xu Yunchao, Li Xiang, Yin Guoqiang, Zhao Jibin

Archives of Civil and Mechanical Engineering

2023

Vol. 23, no. 2

art. no. e124, 2023

Grinding force directly affects the grinding equipment performance, the grinding tool wear, and the machined surface quality, and it is an important grinding performance indicator. In this paper, a tangential force prediction model is established for robot abrasive belt grinding (RABG) of nickel-based superalloy. According to the shape characteristics of grits and the interaction mechanism between grits and workpiece, the tangential components of cutting force and frictional force on the grits are determined. On this basis, the tangential force prediction model is established by the grit protrusion height distribution and the elastic contact theory. In addition, according to the wear characteristics of the structured abrasive belt, the expression of grit distribution density (i.e. the number of grits per unit area) is obtained and applied to the tangential force model. The force model is evaluated by the verification experiment, and the results show that it has good prediction ability. At the same time, this paper discusses the influence of grinding parameters on tangential force, and reveals the material removal characteristics of RABG of nickel-based superalloy based on the analysis of the tangential force and the morphology characteristics of grinding surfaces and chips.