汽车零部件热成形极限裕度云图的构建与应用

发布时间：2018-02-28 17:22

本文关键词： 高强钢板热冲压成形极限图成形裕度云图　出处：《中国机械工程》2017年03期 　论文类型：期刊论文

【摘要】：在热冲压工艺中,热冲压钢板处于高温状态,不同位置温度分布有明显差异,传统方法难以评价冲压件的成形性,考虑温度的三维成形极限图能有效评价热冲压件的成形性能,但无法判断热冲压件的安全裕度。针对上述问题,在考虑温度的三维成形极限图的基础上,首先提出了成形裕度的计算方法;然后结合数值模拟和理论分析手段,构建了适用于评价高强钢板热冲压的安全裕度云图;最后对某汽车B柱热冲压不同工艺过程进行了仿真分析,并与试验进行了对比。结果表明,在不同工艺参数和板料尺寸下,构建的裕度云图均能有效预测高强钢板热冲压件的开裂部位和程度。
[Abstract]:In hot stamping process, hot stamping steel plate is in high temperature state, the temperature distribution of different position has obvious difference, the traditional method is difficult to evaluate the formability of stamping parts, and the three-dimensional forming limit diagram considering temperature can effectively evaluate the formability of hot stamping parts. But it is impossible to judge the safety margin of hot stamping parts. In view of the above problems, a method of calculating forming margin is put forward on the basis of three-dimensional forming limit diagram considering temperature, and then combined with numerical simulation and theoretical analysis, The safety margin cloud diagram suitable for evaluating hot stamping of high strength steel sheet is constructed. Finally, the different process of hot stamping for B column of an automobile is simulated and compared with the test. The results show that under different technological parameters and sheet size, The constructed margin cloud map can effectively predict the cracking position and degree of hot stamping parts of high strength steel plate.
【作者单位】：湖南大学汽车车身先进设计制造国家重点实验室;智能型新能源汽车协同创新中心;
【基金】：国家自然科学基金资助重点项目(61232014);国家自然科学基金资助项目(51405149)
【分类号】：U466;TG306

【参考文献】