第42卷第8期 Vol. 42No. 8
模具
钣压技术
FORGING & STAMPING TECHNOLOGY
2017年8月 Aug-2017
基于应变路径的复杂汽车结构件多工位级进模精确刃口线优化
李贵"，2，周敏",2，陈志平3，熊禾根"2，谭升洪3
（1．武汉科技大学冶金装备及其控制教育部重点实验室，湖北武汉430081；2.武汉科技大学
机械传动与制造工程湖北省重点实验室，湖北武汉430081；3.广东科龙模具有限公司，广东佛山528303）
摘要：复杂汽车结构件多工位级进模具有工位多、结构复杂、工位关联性强的特点，其冲裁工位刃口线受成形工位的影响，刃口线的预测精度低。基于此，提出一种基于应变路径的精确刃口线优化方法。采用有限元逆算法对零件分步展开，获得板
的边界节点基于B样曲线拟合，提取成形前后边界节点的应变及其路径。以设计零件的产品边界为目标，建立精确刃口线优化的目标函数，通过调整B样条曲线，对轮哪线进行选代优化。实例表明，该优化方法可有效提高复杂多工位级进模刃口线优化的精度和效率
关键词：复杂汽车结构件；多工位级进模；刃口线优化；应变路径；数值模拟 DOI: 10. 13330/j. issn. 1000-3940. 2017. 08. 023
中图分类号：TG386
文献标识码：A
文章编号：1000-3940（2017）08-0115-07
Optimization on accurate cutting line of multi-station progressive die for
complicated automotive structure parts based on strainpath
Li Gui'-2, Zhou Min'-2, Chen Zhiping', Xiong Hegen'-2, Tan Shenghong
(1. The Key Laboratory of Metallurgical Equipment and Control Technology, Education Ministry, Wuhan University of
Science and Technology, Wuhan 430081, China; 2. Hubei Key Laboratory of Mechanical Transmission and
Manufacturing Engineering, Wuhan University of Science and Technology , Wuhan 430081, China;
3. Guangdong Kelon Mould Co. , Lad. , Fashan 528303, China)
Abstract: The complex multi station progressive die of complicated automotive parts has many characteristics of many stations, compli-cated structure and strong correlation between stations. However, the cutting line is affected by the forming stations, and the predict accu-
racy of the cutting line is very low.
.Therefore,
timi
nethod of cutting line
: was proposed based on the strain path of material.
and the part was unfolded step by step by inverse algorithm of finite element method to obtain the initial blank outline. Then, the refined
numerical simulation of whole proces
ters. The boundary nodes of boundary nodes
fth
nitial
cutting line was established by taking made by adjusting the B spline curve
the optimization of the cutting line for the c
blan
aes
ccording to
othe B
form
ming
s, refined die surfaoe and real process parame pline curve, and then the strain value and the path
Furthermore , the optimization objective function of the
arget
d the iterative optimization of the cutting line was
xsed method can effectively improve the aceuracy and efficiency of
results show that the prop
iples
ault
tation progressive die
Key words : complicated automotive structure parts; multi
station progressive die; cutting line optimization; strain path; numerical sim-
ulation
高精度、高效率、长寿命多工位级进模具是收稿日期：20170428；修订日期：20170622
基金项目：国家自然科学基金资助项目（51505348）；武汉科技大学冶金装备及其控制教育部重点实验室开放基金资助项目(2015B08)
作者简介：李
责（1983-），男，博士，讲师
E-mail: leegui2030@ wust. edu. en 万方数据
“中国模具行业十三五规划”和《中国制造2025》国家战略的重点发展方向，在汽车结构件、五金家电和电子仪器等领域应用非常广泛(2-4)。汽车结构件多工位级进模具有成形工序多、模具结构复杂、工序间关联性强的特点，使得条料的刃口线预测精度低，需反复调试刃口线，
导致模具制造成本高、
周期长，进而影响模具质量。因此，提高刃口线精