摘要
考虑到车身内覆盖件具有外形复杂、冲压成形工艺方案难以定性、工艺参数难以定量的特点,以特征件形式研究其冲压成形工艺规律相对科学。以半盒形特征件为研究对象,应用Barlat(1997)非二次屈服准则以及与Barlat(1997)屈服函数相关联的流动准则建立弹塑性本构模型进行板料应力应变分析,预测了制件的成形缺陷并进行了成形工艺优化。仿真与优化结果表明:全工序冲压成形仿真能够快速、有效的获取工艺模面,实现了全工序模面设计与多步冲压成形仿真与优化设计的可靠衔接;合理的产品造型优化与切边线优化的应用分别消除了制件的开裂现象与减小了实际边界轮廓误差。
The inner panel of automobile body has the characteristics of complex shape,difficulty to define the stamping process plan and difficulty to quantify the process parameters.It is relatively scientific to study the stamping process law in the form of feature parts.Based on Barlat′s(1997)non-quadratic yield criterion and flow criterion associated with Barlat′s(1997)yield function,an elastic-plastic constitutive model is established for stress-strain analysis of half-box feature parts.The forming defects of the parts are predicted and the forming process is optimized.The simulation and optimization results show that the whole process stamping simulation can be used to obtain the process die surface quickly and effectively,and realize the reliable docking between the whole process die surface design and multi-step stamping simulation and optimization design.Reasonable application of product shape optimization and trimming line optimization eliminates cracking and reduces actual boundary contour error.
作者
王利
黄昭明
胡李勇
张成
WANG Li;HUANG Zhaoming;HU Liyong;ZHANG Cheng(Xuancheng Vocational & Technical college,Xuancheng 242000,China;Wanjiang University of Technology,Ma′anshan 243031,China;Wuxi Jiuhe Mould Co.,Ltd,Wuxi 214142,China)
出处
《沈阳理工大学学报》
CAS
2019年第2期44-48,53,共6页
Journal of Shenyang Ligong University
基金
安徽省高等学校专业(学科)拔尖人才资助项目(gxbjZD63)
院级重点科研项目(KJ201801)
关键词
内覆盖件
半盒形特征件
本构模型
模面设计
多步冲压成形
inner panel
half-box feature parts
constitutive model
die surface design
multi-step stamping
