一种双拔模加变斜面锻模结构参数优化设计
Structural Parameters Design on Forging Die of A Double-pull Mode with Variable Slope
周 杰1， 舒锐志1， 卢先正1， 凌 君2
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作者单位：1.重庆大学 材料科学与工程学院， 重庆 400044; 2.重庆大江杰信锻造有限公司， 重庆 401321
中文关键字：深型腔； 双拔模； 变斜面； 有限元分析； 正交试验
英文关键字：deep cavity; double-pull mode; variable slope; finite element analysis; orthogonal experiment
中文摘要：针对深型腔类锻件模锻成形过程难以起形的问题，在综合常规飞边槽与楔形飞边槽优点的基础上，提出了新型预锻模具结构--双拔模加变斜面结构。以减小深型腔部位未充满距离和降低成形载荷为目标，通过优化分析得到最优结构参数，为双拔模加变斜面结构的应用提供设计依据。应用正交试验设计对结构参数进行抽样，采用有限元分析软件Deform对所得样本进行数值模拟仿真。对模拟结果依据各指标重要性不同确定各指标相对重要性的权数，然后求加权和作为试验总分数，参考总分高低确定最优实验方案。生产实践表明，采用带双拔模面加变斜面结构的预锻模，能够保证得到合格的锻件，验证了优化结果的可靠性。
英文摘要：To solve the problem that deep cavity type forgings are difficult to forming during forging process, a new structure form for pre-forging die：double-pull mode with variable slope which combines the advantages of conventional flash cave and wedge flash cave was proposed. Taking reducing the forming load and the unfilled distance of the deep cavity site as objective, the optimum parameters of the structure were obtained through optimization analysis, which provided the design basis for application of double-pull mode with variable slope. The orthogonal experiment was used to carry out sampling of parameters, and the obtained samples were simulated by finite element software Deform. According to different importance of each indicator, the relative importance of each index weights from the simulation results was determined. Then the weighted total score was summed as the last test by which the optimal program of experiment was determined. The productive practice indicates that acceptable quality forgings are produced with the structure of the pre-forging die. Therefore, the optimized results are verified to be effective.