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通过采用有限体积法(FVM),在MSC.Superforge有限元商业软件上实现了铝合金轮毂等温模锻成形的数值模拟,并进行了铝合金轮毂等温模锻成形实验。研究发现,轮毂锻件成形规律在数值模拟与实验中不一致,将数值模拟与实验进行分析可知,模拟实验中加强筋上对应的轮缘为凹形,即加强筋上方金属晚于其他区域成形;而实际实验中加强筋上对应的轮缘为凸形,即加强筋上方金属早于其他区域成形。在计算机上获得了锻件与模具接触判定和潜在润滑凹槽值,可以推断轮毂成形过程中,加强筋处未充满的间隙形成封闭腔室,受到成形金属的排斥作用,润滑剂更易向加强筋流动,造成了数值模拟与实验中金属流动规律的差异。
By using finite volume method (FVM), the numerical simulation of isothermal die forging of aluminum alloy wheel was implemented on MSC.Superforge finite element commercial software, and the isothermal die forging experiment of aluminum alloy wheel was carried out. The research shows that the forming rule of the wheel hub forgings is inconsistent in numerical simulation and experiment. By analyzing the numerical simulation and experiment, it is found that the corresponding rim on the stiffener in the simulation experiment is concave, that is, the metal above the stiffener is formed later than other areas; In practical experiments, the rims corresponding to the stiffeners are convex, that is, the metal above the stiffeners is formed earlier than other regions. Obtained on the computer forgings and mold contact determination and potential lubrication groove value, it can be concluded that the wheel forming process, the stiffener is not full of gaps to form a closed chamber, by the forming metal repulsion, the lubricant more easily flow to the stiffener , Resulting in the numerical simulation and experimental differences in the laws of metal flow.