冲压模拟用材料卡片开发

Development of Material Card for Stamping Simulation

材料性能表征的准确度对数值模拟计算结果有着至关重要的影响。在CAE软件中普遍包含有欧洲主流材料商以及少数国内厂商的材料卡片,但由于各厂商材料特性各不一样,对应的同一牌号材料的材料卡片所呈现的数据分布规律及所用屈服、硬化准则各不相同,因此作为材料生产商来讲,准确表征自家产品特性,编制自有材料卡片是冲压工艺评估、模具设计制造等产品应用中不可或缺的环节。文章以包钢冷冲压用钢的典型牌号DC04为对象,制定适用表达冷冲压性能的试验方案,研究数据处理方法,最终开发出能准确表征包钢产品特性的冲压模拟仿真分析用材料数据卡片,根据该材料卡的计算指导,冲压工况调整后,得到适用于包钢板料性能特性的冲压工艺,保证模拟技术支持的准确性,并精准提高产品适用性。

The accuracy of performance characterization for material has crucial influences on the numerical simulation results. In the software CAE, it generally contains the material cards of European mainstream material suppliers and a small number of domestic manufacturers, but due to different material characteristics of each manufacturer, the corresponding material card of material with the same grade shows different data distribution law as well as the criterion of yield and hardening. Thus, it is an indispensable link in such product applications as evaluation of stamping process as well as design and manufacture of mould to accurately characterize the characteristics of their own products and establish own material cards for material manufacturers. In the paper, the test scheme suitable for presenting cold stamping performance is established and data processing method is studied by taking the typical grade DC04 for cold stamping steel as the objective. Finally, the material data card for stamping simulation analysis which could accurately characterize product characteristics of Baotou Steel is developed. After adjust the working condition of stamping based on the calculation guidance of material data card, the stamping process suitable for performance characteristics of sheet matal of Baotou Steel is obtained to ensure the accuracy of simulation technology support and accurately improve the applicability of product.