锻压技术

相对弯曲半径对成形凹模接触应力峰值的影响

英文标题：Influence of relative bending radius on contact stress peak of forming die

作者：李伟王成勇鲁志兵张鹏张贺宁

单位：合肥工业大学

分类号：TG385.2

出版年,卷(期):页码：2013,38(5):46-49

摘要：

动态接触应力尤其接触应力峰值是造成高强钢成形凹模局部磨损的主要原因，相对弯曲半径是影响接触应力峰值的最大因素。通过宽板弯曲成形圆角受力分析，得到相对弯曲半径与板料厚向主应力关系式，定性分析相对弯曲半径与凹模圆角接触应力的负相关性。利用U形件弯曲有限元模型，获得系列相对弯曲半径对应的接触应力峰值曲线，分析峰值曲线特征及变化趋势。经拟合分析得到最大接触应力峰值与相对弯曲半径的二阶多项式关系，可为接触应力峰值预测、模具选材提供指导。

The dynamic contact stress especially the peak of contact stress is the main reason for the regional wear of high strength steel forming die. The most important factor that influences the peak of contact stress is the relative bending radius. By the stress analysis of wide sheet bending forming, the relation of relative bending radius and the principal stress at the direction of plate thickness was obtained. Qualitative analysis of the negative correlation between relative bending radius and contact stress of die fillet was carried out. With the finite element model of U-shaped bending, a series of relative bending radii corresponding to the peak contact stress curves were obtained and the peak curve characteristics and trend were analyzed. Through the fitting analysis, the second order polynomial relations of the maximum contact stress peak value and the relative bending radius were fitted. The equation can help engineers to predict the peaks of contact stress and to choose mold material.

基金项目：

教育部科学研究重大项目（311025）；国家基金面上项目（51275146）；安徽省自然科学基金资助项目(1208085ME71)；省部级重点实验室项目（2010SJSY0210）

李伟（1988-），男，硕士研究生

参考文献：

［1］刁可山，曹猛，姜浩民，等.DP600高强钢零件冲压成形有限元仿真及试验[J].塑性工程学报，2010，17(3)：66-69.Diao K S，Cao M，Jiang H M，et al. FEM and experiment analyses of stamping process for AHSS part[J]. Journal of Plasticity Engineering，2010，17(3)：66-69.
［2］马鸣图，Shi M F. 先进的高强度钢及其在汽车工业中的应用[J].钢铁，2004，39(7)：68-72.Ma M T，Shi M F. Advanced high strength steel and its applications in automobile industry[J].Iron and Steel，2004，39(7)：68-72.
［3］刁可山，姜浩民，曹猛，等.基于CAE 的DP600 高强钢零件回弹特征分析及控制[J].锻压技术，2010，35(5)：47-51.Diao K S，Jiang H M，Cao M，et al. Springback analysis and control of DP600 AHSS part based on CAE technology[J]. Forging & Stamping Technology，2010，35(5)：47-51.
［4］蒋浩民，陈新平，石磊，等.先进高强度钢板的冲压成形特性及其应用[J].塑性工程学报，2009，16(4): 183-186.Jiang H M，Chen X P，Shi L，et al. Forming characteristics and application of advanced high strength steel[J].Journal of Plasticity Engineering，2009，16(4): 183-186.
［5］Pereira Michael P，Yan Wenyi，Rolfe Bernard F.Contact pressure evolution and its relation to wear in sheet metal forming[J].Wear，2008，265：1687-1699.
［6］董湘怀.金属塑性成形原理[M].北京：机械工业出版社，2011.Dong X H.Principles of Metal Plastic Forming [M].Beijing: China Machine Press, 2011.
［7］Pereira Michael P，Yan Wenyi，Rolfe Bernard F.Wear at the die radius in sheet metal stamping[J].Wear，2012，(274-275)：355-367.
［8］Groche P，Moeller N，Hoffmann H，et al. Influence of gliding speed and contact pressure on the wear of forming tools[J].Wear，2011，271：2570-2578.
［9］Pereira Michael P，Duncan John L，Yan Wenyi，et al. Contact pressure evolution at the die radius in sheet metal stamping [J]. Journal of Material Processing Technology，2009，209：3532-3541.
［10］Wang X Z，Masood S H. Investigation of die radius arc profile on wear behaviour in sheet metal processing of advanced high strength steels[J].Materials and Design，2011，32：1118-1128.
［11］丁日显，张缓缓，朱其超,等.精冲1020板料接触应力变化特点[J].锻压技术，2012，37(4)：40-43.Ding R X，Zhang H H，Zhu Q C，et al. Characteristics of contact stress variation in fine-blanking process of ASM 1020 steel sheet[J].Forging & Stamping Technology，2012，37(4)：40-43.

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