锻压技术

基于ABAQUS曲底槽型件热冲压成形模拟分析

英文标题：Simulation analysis on the hot stamping of groove parts with curved bottom based on ABAQUS

作者：刘硕李小平彭成允倪朝敏

单位：重庆理工大学

关键词：热冲压温度场数值模拟 ABAQUS

分类号：TG302；TH142

出版年,卷(期):页码：2015,40(5):74-79

摘要：

在超高强度钢板热冲压成形工艺中，能准确预测板料的温度场与模具的受力状况，对工艺制定与模具的优化具有重要意义。通过ABAQUS模拟软件建立塑性体热力耦合有限元模型，对热冲压过程进行模拟仿真，分析板料与模具的温度场以及模具所受的作用力。研究结果表明：板料转移时间控制在10 s内较好；在成形过程中，制件法兰与侧壁部分温度分布均匀且基本一致，制件法兰与侧壁部分的温度低于制件底部部分的温度；为保证模具强度，凸模圆角处及底部、凹模入口圆角处及底部的冷却水道直径及密度应较小，并且应适当增大水道与底部表面的距离。

In the hot stamping process of ultra high-strength sheet metal, it is critical to predict the temperature field of the sheet metal and the stress of the die accurately for the optimization of the die and the design of the process. Based on the simulation software ABAQUS, the thermo-mechanical coupled elastic-plastic FEM model was established to simulate the hot stamping process, and the analysis on the temperature field of sheet metal, die and its stress were analyzed. Research results show that the time spent in sheet transferring should be controlled within 10 s. In the forming process, the temperature distribution on the flange and the wall of the part is uniform and equal, and the temperature is lower than the bottom temperature of the part. In order to ensure the die strength, the diameter and density of cooling waterway at fillets and bottoms of both the punch and the die entrance should be small, and the distance between waterway and the bottom should be increased accordingly.

基金项目：

国家自然科学基金资助项目（51375521）；重庆市应用研发计划资助项目（cstc2013yykfA70001)

刘硕（1990-），男，硕士研究生李小平（1968-），男，博士，副教授

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