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以阶梯形件为研究对象,使用eta/DYNAFORM5.7.3,模拟了零件充液拉深工艺成形过程,获得了工艺中液压力大小与成形件最小壁厚的关系,并且探讨了产生这种结果的主要原因。然后根据恒液压力充液拉深数值模拟的结果,设定了4种变液压力加载模式。经过优化,最后确定了一种较好的变液压力加载模式。模拟结果表明,在室温条件下,初始液压力(凸模与坯料接触时的液压力)为5MPa,按照某模式加载到20MPa后,保持不变,可以得到最小壁厚为0.308 mm的成形件。
Taking eta / DYNAFORM5.7.3 as the research object, eta / DYNAFORM5.7.3 was used to simulate the process of forming the part by liquid-filled drawing. The relationship between the hydraulic pressure in the process and the minimum wall thickness of the formed part was obtained. main reason. Then according to the results of numerical simulation of constant liquid pressure liquid-filled drawing, four kinds of variable liquid-pressure loading modes were set up. After optimization, finally determined a better fluid pressure loading mode. The simulation results show that under room temperature, the initial hydraulic pressure (hydraulic force when the punch and the blank are in contact) is 5MPa, and the molded part with the minimum wall thickness of 0.308mm can be obtained after being loaded to 20MPa according to a certain mode.