Analysis of thermal-mechanical causes of abrasive belt grinding for titanium alloy

Abstract

The abrasive belt grinding process is a highly nonlinear dynamic change process. The coupling action mechanism between mechanical field and thermal field during grinding is complex and variable. In this paper, firstly, the abrasive belt grinding experiment of titanium alloy was carried out to measure the change of temperature and force during the grinding process, and the Savitzky-Golay filter analysis was carried out on force signal. Secondly, the generation of grinding heat and force was described in detail, the equilibrium process of thermal-mechanical coupling was analyzed, and the finite element equation of thermal-mechanical coupling was deduced for abrasive belt grinding. Thirdly, the finite element simulation model of abrasive belt grinding is established to comprehensively analyze the change rule of thermal-mechanical coupling in the grinding process. Finally, the experimental results and simulation results of belt grinding are discussed and analyzed. The experimental results found that the grinding force changes are divided into three different stages, and the maximum surface temperature decreases to a certain extent with the grinding process. The simulation results show that the plastic deformation zone and “dead metal zone” are consistent with the theory in the grinding process. This study can provide a reference for relevant machining and further improve the grinding workpiece’s surface quality through thermal-mechanical optimization.