中南大学学报（自然科学版）2018，Vol.49Issue(3)：544-552,9.DOI:10.11817/j.issn.1672-7207.2018.03.005
基于混合磨损模型的模具轮廓优化设计
Optimum design of die profile based on mixed wear model
摘要
Abstract
Aiming at solving problems of great wearing and low life of mold, the optimum design of die profile based on mixed wear models was used. As an example, the mandrel of wheel hub in forging process was studied, and the contour of mandrel was analyzed in order to select three parameters to optimize. Combined with three basic wear models, i.e., adhesive wear, abrasive wear and oxidative wear, a new calculate model was established, and then wear value of the mold surface was obtained by forging numerical simulation and using uniformity wear which can reflect homogeneous degree of wear as judgment standard. On the basis of this analysis, the numerical simulation results were used as training sample to establish three layers BP neural network, and instead of the finite element model with trained BP neural network, the nonlinear mapping relationship between the design variable and the target function was acquired. Finally, combining the trained mapping function and genetic optimization algorithm, the mandrel shape of wheel hub and reverse parameters were optimized under the condition of the most uniform. The results show that after optimization of mandrel, uniformity wear value decreases by 29.65% and maximum wear value reduces by 12.59% than that before optimization, the amount of wear on upper punch becomes more uniform and the maximum wear is smaller.关键词
混合磨损模型/模具轮廓/模具磨损/优化设计Key words
mixed wear model/mold contour/die wear/optimum design分类
矿业与冶金引用本文复制引用
徐戊矫,刘承尚,马欣,郭子乾,陈菲..基于混合磨损模型的模具轮廓优化设计[J].中南大学学报（自然科学版）,2018,49(3):544-552,9.基金项目
中央高校基本科研业务费资助项目(CDJZR14130005, CDJZR13130087) (Projects(CDJZR14130005, CDJZR13130087) supported by the Fundamental Research Funds for the Central Universities) （CDJZR14130005, CDJZR13130087）
