Hot Spinning Process Of Titanium Alloy Collar Rim Of Lunar Rover

The collar rim, the element of the lunar rover plays an important role as component of bearing stress in the process of moon exploration. Titanium alloy with its excellent combination property and working temperature up to 400℃is considered ideal material of the collar rim. The modern spinning technique is an advanced plastic formation technology used in the metal precision finishing industry and also the main formation method of the revolving body parts in a small batch quality and great variety, which could form the high quality collar rim of lunar rover. Because of the thin wall and relatively long diameter, it is easy to cause the phenomena of destabilization,corrugation,and dehiscence, moreover, there are many influential factors of general spinning technology with the complex relations,hence, it is difficult to carry out the improvement and promotion work in the quality of end products and process control, just depending on the trial methods to study the spinning problems of the Titanium alloy collar rim of the lunar rover. Numerical simulation,especially,the application of the FEM, has provided the advanced analytical methods of the spinning technique. The FEM is used to simulate the whole formation process, and is helpful to unveil the influential rules of the quality of final parts from the technological parameter,and it is also applied to shorten the research period, decrease the study cost, and provide the guidance and help in the experiments.In this dissertation, the ANSYS/LS-DYNA software is applied to carry out the elastic-plastic finite element numerical modeling in the spinning process of the Titanium alloy collar rim of the lunar rover to get the stress-strain distribution rule, deforming flowing rule, and wall thickness distribution rule in the different periods of the spinning formation stage, and later preliminarily analyze the mechanism of production of the destabilization, corrugation, and dehiscence. It has obtained the influential rules of the spinning formation from the technological parameter through the simulation of the spinning process on the different technological parameters.It provides the basis for the conventional spinning experiment through the texture observation and performance testing of the different stock conditions of...