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针对防碰撞吸能管成形需要,提出了对铝合金6061圆管液压胀形过程的轴向进给补偿液压力加载路径控制过程。通过数值模拟方法,采用分析软件ABAQUS 6.10对铝合金6061管材液压胀形的加载路径进行了研究。以成形件不发生起皱、破裂两种失效方式以及最终成形壁厚分布为依据,分析了不同轴向进给和液压力加载路径对成形件质量的影响。研究表明,采用轴向进给量为27mm,液压力为85MPa的加载路径,获得吸能管的最大减薄率为20.5%,成形质量较好,并在一副模具中同时完成S型过渡区域的成形。
According to the need of anti-collision energy absorbing tube forming, the axial load compensation hydraulic pressure load path control process of 6061 aluminum alloy tube was proposed. Through the numerical simulation method, the analysis software ABAQUS 6.10 was used to study the loading path of hydraulic bulging of 6061 aluminum alloy pipe. The effects of different axial feed and hydraulic loading paths on the quality of formed parts were analyzed based on the failure modes of the formed parts without wrinkling and rupture and the final formed wall thickness distribution. The results show that the maximum reduction rate of energy absorption tube is 20.5% with the axial feed rate of 27mm and the hydraulic pressure of 85MPa. The forming quality is good and the S type transition zone Forming.