锻压技术

中厚板的反挤凸柱成形规律

英文标题：Forming laws of lug boss backward extrusion for medium-size plate

作者：亢飞毛华杰刘艳雄洪峰

单位：武汉理工大学

分类号：TH164

出版年,卷(期):页码：2017,42(8):165-172

摘要：

运用有限元软件DEFORM-3D对5 mm厚的20钢中厚板进行了反挤凸柱成形模拟研究，对比分析了封闭式模腔、全开式模腔、半开式模腔挤压成形时材料的变形特点。研究揭示了3种成形方式下金属的流动规律、等效应力及等效应变的分布、载荷与行程的关系，从而可根据成形载荷、凸柱高度与凸凹模行程的关系来合理选择模腔形式。进而研究了凸凹模圆角半径、凸柱直径与坯料初始直径之比d/D、凸凹模下行速度等因素对于各挤压方式下凸柱高度的影响。最后，选取半开式模腔成形凸柱进行实验，实验结果和有限元模拟结果符合较好，验证了有限元模拟的准确性。

Forming simulation on lug boss backward extrusion for steel 20 medium-size plate with 5 mm thickness was implemented by finite element software DEFORM-3D, and material deformation features in close die cavity, open die cavity and jar die cavity were compared and analyzed.The study shows that the sheet metal flowing laws, equivalent stress and equivalent strain distribution, relationship between load and stroke under three die cavities are explored, and die cavity type can be appropriately selected according to the relationship between load, lug boss height and punch-die stroke. Furthermore, influences of punch-die corner radius, d/D (d=lug boss diameter, D=initial diameter of part), punch-die velocity on lug boss height are researched for different extrusion modes. At last, the lug boss with half open die cavity is formed, and experiment results agree well with simulation results, which shows accuracy of finite element simulation.

基金项目：

国家自然科学基金资助项目（51375356）；教育部创新团队发展计划项目“先进汽车零部件技术”(IRT13087)

亢飞（1990-），女，硕士研究生刘艳雄（1985-），男，博士，副教授

参考文献：

［1］周开华. 精冲技术的发展与应用[J]. 模具制造,2008,(3):1-7.Zhou K H. Development and application of fine blanking technology[J]. Die and Mould Technology, 2008，(3):1-7.
［2］刘胜林. 板料精冲与挤压复合成形研究[D].武汉：武汉理工大学,2007.Liu S L. Research of the Combined Fine Blanking and Extrusion Process on Sheet Metal [D]. Wuhan: Wuhan University of Technology, 2007.
［3］曹晨华. 精冲与复合精冲工艺参数研究[D].武汉：武汉理工大学,2009.Cao C H. Research on the Parameter of Fine Blanking and Combined Blanking Process [D]. Wuhan: Wuhan University of Technology, 2009.
［4］Deng M，Ma Y L，Lyu L. Development of closed extruding fine blanking technology[J].Procedia Engineering, 2014,81：1157-1162.
［5］林启权，张学兵，王振球，等. 板料凸起成形的底部压缩拉深法[J].锻压技术,2010,35(6):53-57.Lin Q Q, Zhang X B, Wang Z Q, et al. Study on bottom compression-drawing of boss deforming on plate [J]. Forging & Stamping Technology, 2010, 35(6):53-57.
［6］刘丹. 厚板带孔凸台挤冲复合成形过程数值模拟及工艺参数优化[D].广州：广东工业大学,2011.Liu D. Numerical Simulation of Combined Extruding and Punching Process for A Thick-plate with Tubular Bulge and Parameters Optimization [D]. Guangzhou: Guangdong University of Technology, 2011.
［7］王伟. 中厚板凸柱成形数值模拟与工艺试验研究[D].北京：北京机电研究所,2013.Wang W. Research on Numerical Simulation and Process Test for Boss Forming of Plate [D]. Beijing: Beijing Research Institute of Mechanical & Electrical Technology, 2013.
［8］王嘉. 反挤压凸模形状对挤压成形工艺的影响[J].模具技术,2009,(1):27-29.Wang J. Effects of backward extrusion punch shape on extrusion forming process [J]. Die and Mould Technology, 2009, (1):27-29.
［9］韩冬瑞, 董延. 基于 DEFORM-3D 软件的AZ31镁合金管材反挤压过程计算机模拟研究[J].热加工工艺,2015,44(11):158-161.Han D R, Dong Y. Computer simulation study on backward extrusion process of AZ31 magnesium alloy tube based on DEFROM-3D Software [J]. Hot Working Technology, 2015, 44(11):158-161.
［10］Kenji Hirota, Kota Michitsuji. Deformation behaviour in boss forming by sheet extrusion[J]. Procedia Engineering, 2014,81, 395-400.
［11］Zheng P F, Chan L C, Lee T C. Numerical analysis of the sheet metal extrusion process[J]. Finite Elements in Analysis and Design, 2005, 42(3): 189-207.
［12］孙文杰, 向华, 庄新村, 等. 工艺参数对中厚板高凸台挤压成形影响的分析[J]. 上海交通大学学报,2011,45(11):1710-1719.Sun W J, Xiang H, Zhuang X C, et al. The influence factors of forming results in medium-thick sheet metal high boss forming process[J]. Journal of Shanghai Jiaotong University, 2011, 45(11):1710-1719.
［13］张士宏, 周丽新, 王忠堂.板材零件局部体积成形技术研究[J]. 塑性工程学报,2008,15,(2):31-36.Zhang S H, Zhou L X, Wang Z T. Research on local bulk forming of sheet metal parts [J]. Journal of Plasticity Engineering, 2008, 15(2):31-36.
［14］孙颖迪, 陈秋荣. AZ31镁合金电池筒反挤压工艺仿真研究[J]. 锻压技术,2015,40（3）:46-52.Sun Y D, Chen Q R. Numerical study of backward extrusion process for AZ31 magnesium alloy battery cylinder[J]. Forging & Stamping Technology, 2015,40（3）:46-52.

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