| Summary: | 碩士 === 國立交通大學 === 機械工程系所 === 107 === Absorbing impact by tube deformation was the original tube inversion application. Because of the special shape after the deformation, this research considered tube inversion as a forming process. Double-walled inverted tube could be a sound insulation for the motor, a thermal insulation for the inner wall of the thermos or a cavity to enclose electronic parts in during the forming process, etc. Double-walled inverted tubes had different shapes and sizes with different applications. In this research, the influence of different parameters to the forming results would be found by the inversion forming of small-sized aluminum tube geometry.
This research was divided into three part, i.e. experiments, simulations and regression analysis of simulation results. The research started with experiment and establishing model of finite element simulation, followed by confirmation of the accuracy of simulation with experimental results. The effects of different factors including tube wall thickness, lower mold fillet radius and lower mold friction coefficient on tube inversion were obtained by the results of the simulation and analyzed with regression analysis.
This research also compared the influence of different parameters with each other on tube inversion, and obtained the degree of influence between different parameters. These influence analysis can be used as the basis for future tube inversion process design.
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