| 精冲过程的数值模拟及工艺参数优化 |
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| 引用本文： | 庄新村,赵震,谢晓龙,虞松,李从心.精冲过程的数值模拟及工艺参数优化[J].东南大学学报,2006,22(4):514-518. |
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| 作者姓名： | 庄新村 赵震 谢晓龙 虞松 李从心 |
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| 作者单位： | 上海交通大学国家模具CAD工程研究中心,上海200030 |
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| 基金项目： | The National Natural Science Foundation of China （ No. 50505027）. |
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| 摘 要： | 精冲过程是典型的局部塑形大变形过程，基于其成形特点建立有限元数值仿真模型，对精冲工艺进行弹塑形大变形有限元仿真．模型采用网格重划分方法解决网格畸变情况严重时造成计算终止以及计算结果不收敛的问题，同时引入McClintock韧性断裂准则来预测裂纹出现和扩展的时间及位置．在此基础上，给出了剪切区内应力、应变的分布以及发展趋势，同时针对精冲过程中的工艺参数，如凸凹模间隙、刃口圆角、压边力、反顶力等，对精冲成形面质量的影响加以了分析，给出了工艺参数的影响规律，模拟结果与实际生产情况基本符合，可用于指导工艺参数优化．
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| 关 键 词： | 金属成形 精冲 韧性损伤 韧性断裂 有限元方法 |
| 收稿时间： | 04 7 2006 12:00AM |
Numerical simulation and optimization of process parameters in fineblanking process |
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| Zhuang Xincun,Zhao Zhen,Xie Xiaolong,Yu Song,Li Congxin.Numerical simulation and optimization of process parameters in fineblanking process[J].Journal of Southeast University(English Edition),2006,22(4):514-518. |
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| Authors: | Zhuang Xincun Zhao Zhen Xie Xiaolong Yu Song Li Congxin |
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| Abstract: | Fineblanking process is a typical large localized plastic deformation process.Based on its forming characteristics,a numerical model is established and an elasto-plastic simulation is performed using the finite element method (FEM).The re-meshing method is used when the severe element distortion occurs to facilitate further computation and avoid divergence.The McClintock fracture criterion is adopted to predict and determine the time and site of crack initiation and propagation.Based on this numerical model,the distribution and developing trend of the stress and strain in the shearing zone are predicted.Furthermore,the influence of several process parameters,such as punch-die clearance,edge radius of punch and die,V-ring force,counter force,etc.,on the blanked quality is analyzed.The discipline is in accordance with the actual manufacture situation,which can be a guidance to optimization of process parameters. |
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| Keywords: | metal forming fineblanking ductile damage ductile fracture finite element method |
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