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针对铝合金方盒形件塑性变形能力较差、变形不均匀等问题,进行了粘性介质压力成形研究。期望利用粘性介质的自身性能延缓铝合金方盒形件破裂和起皱等缺陷的产生,以提高铝合金方盒形件的成形质量和使用性能。研究过程中,采用有限元软件ANSYS/LS-DYNA对铝合金方盒形件粘性介质压力成形过程进行仿真分析,根据成形试件形状特点和材料力学性能对成形所需坯料形状及压边力加载曲线进行了优化,得到了不同工艺参数条件下的成形试件几何形状和壁厚分布规律,在此基础上进行了粘性介质压力成形试验。结果表明,坯料几何形状对材料流动规律和试件成形质量影响较大,在合适的压边力条件下,采用粘性介质压力成形方法能够成形出满足使用要求的铝合金方盒形件。
Aiming at the problems of poor plastic deformation capacity and uneven deformation of aluminum alloy square box, the research of viscous medium pressure forming was carried out. Expected to use their own properties of viscous media delay aluminum alloy box-shaped pieces of rupture and wrinkles and other defects in order to improve the aluminum alloy square box forming quality and service performance. In the process of research, the finite element software ANSYS / LS-DYNA was used to simulate the pressure forming process of viscous media for aluminum alloy square box. According to the shape characteristics and mechanical properties of the formed sample, the shape of the blank and the blank holder force were loaded The curves were optimized. The geometrical shape and wall thickness distribution of the formed specimens under different technological parameters were obtained. Based on this, the viscous medium pressure forming test was carried out. The results show that the billet geometry has a great influence on the material flow and the forming quality of the test piece. With the suitable blank holder force, the aluminum alloy square box can be formed by using the viscous medium pressure forming method.