网格条截面形貌的有限元分析与预测

Jianzhong Mao, Zhi Cheng, Jun Su, Ben Wang, Pengfei Zhang, Zezhi Mei, Jiajian Yuan, Bo Gao
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引用次数: 0

摘要

为了研究锆合金带材断面形貌质量与落料参数及落料模具设计的关系,采用拉丁超立方抽样方法生成了64种加工参数组合,并建立了不同边界条件下的有限元模型,得到了相应的断面质量。实验数据验证了有限元模型的计算结果。在此基础上,利用随机森林算法建立了加工参数与截面亮条长度之间的预测模型。通过预测模型对工艺参数对断面质量的影响进行了敏感性分析。结果表明,所建立的随机森林预测模型具有较好的精度,能有效地预测型腔内亮带的长度,为模具设计和工艺参数的选择提供指导。设计因子中包含的落料间隙对亮条长度有决定性影响;摩擦系数对结果的影响最小。倒角半径和冲裁速度对亮带长度的影响不显著。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Finite Element Analysis and Prediction of the Cross-Section Morphology of Grid Strips
To investigate the relationships between the quality of the section morphology of the zirconium alloy strips and the blanking parameters as well as the design of the blanking mould, 64 processing parameter combinations are generated by using Latin Hypercube Sampling and the finite element models with different boundary conditions have been constructed to acquire the corresponding section qualities. The calculation results of the finite element model are verified by the experiment data. Furthermore, the random forest algorithm is employed to build the prediction model between the processing parameters and the lengths of the section bright strip. The sensitive analysis of the processing parameters influenced on the section quality have been conducted through the prediction model. The results indicate that the random forest prediction model have a satisfied accuracy, which could effectively forecast the length of the bright band in the section, and then provides guidance on mold design as well as process parameter selections. The blanking clearance included in the design factor has a decisive influence on the length of the bright strip; The friction coefficient has the weakest effect on the results. The effect of die fillet radius and blanking speed on the length of bright band is not significant.
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