锻压技术

网孔板渐进成形性能

英文标题：Incremental forming performance of retiary sheet metal

作者：张淑芹王进史继臣张晓博张志刚

分类号：TG386

出版年,卷(期):页码：2016,41(8):48-52

摘要：

采用单点连续渐进成形和点压渐进成形分别对网孔板进行定角度锥杯实验，实验结果显示单点连续渐进成形极限角为48°，大于点压渐进成形极限角为45°。采用这两种渐进成形方式，网孔板变形区域的圆孔均变成椭圆孔。通过测量这两种渐进成形42°定角度锥杯椭圆孔长轴尺寸，表明单点连续渐进成形网孔变形相对较小。采用动态有限元软件，模拟这两种渐进方式成形42°定角度锥杯过程，研究对比其应变、厚度及成形力的变化。模拟结果表明，点压渐进成形网孔板应变、厚度变化波动范围较小，成形力较单点连续渐进成形减小了44%，这两种渐进成形网孔板锥杯的椭圆孔短轴侧厚度较长轴侧厚度减小很多。

The fixed-angle conical cup experiments for the retiary sheet metals were carried out by single-point and point-press incremental forming respectively. The results show that forming limit angle 48° is obtained by single-point incremental forming, and forming limit angle 45° is obtained by point-press incremental forming. However, circle holes turn into elliptical hole at the area of deformation by the above incremental formings. Furthermore, the long axis sizes of elliptical hole were measured for the 42 °cone cup. Thus, retiary deformation in the single-point incremental forming is relatively smaller. Then, the forming processes of the 42 ° cone cup by the two kinds of incremental forming were simulated by dynamic finite element software, and the changes of strain, thickness and forming force were studied and compared. The numerical simulation results show that the changing ranges of strain and thickness are smaller in the point-press incremental forming, and the forming force reduces by 44% compared with that of single-point incremental forming. Finally, the thickness of the elliptical hole at short axis side reduces more than that at long axis side by the above incremental forming methods for circle hole plate.

基金项目：

国家自然科学基金资助项目（51205217）

张淑芹（1988-），女，硕士研究生王进(1978-)，男，博士，副教授

参考文献：

［1］谭富星,李明哲,蔡中义.带孔网板数字化多点成形过程中拉裂缺陷的有限元分析[J].机械工程学报,2008, 44(6):120-124. Tan F X, Li M Z, Cai Z Y. Finite element analysis of fractures in the process of digital multi-point forming for retiary sheet metal[J]. Journal of Mechanical Engineering,2008, 44(6):120-124.
［2］朱亨荣,王志忠,王镇柱,等.轴对称带孔板坯拉深-翻孔复合成形的仿真与实验[J].塑性工程学报,2013, 20(5):50-55.Zhu H R, Wang Z Z, Wang Z Z, et al. Simulation and experimental study for drawing-flanging compound forming of axisymmetric holed slab[J]. Journal of Plasticity Engineering, 2013, 20(5):50-55.
［3］余江鸿,胡成武,占奇锋,等.轴对称带孔板拉深-翻孔复合变形的实验研究[J].塑性工程学报,2010, 17(6):14-17.Yu J H, Hu C W, Zhan Q F, et al. Experimental study on composite deformation of drawing-flanging for axisymmetric holed slab[J] . Journal of Plasticity Engineering, 2010, 17(6):14-17.
［4］莫健华, 丁勇, 黄树槐. 金属板材数控单点渐进成形加工轨迹优化研究[J]. 中国机械工程,2003,14(24): 75-77.Mo J H, Ding Y, Huang S H. Research on tool-path optimization of sheet metal numerical control single point incremental forming[J]. China Mechanical Engineering, 2003, 14(24): 75-77.
［5］张志刚, 王进, 李丽华,等. 点压渐进成形工具头运动轨迹形成方法研究[J]. 锻压技术,2015, 40(3): 70-73.Zhang Z G, Wang J, Li L H, et al. Research on the method of motion trajectory of tool-head in incrementally pressing forming[J]. Forging & Stamping Technology,2015, 40(3): 70-73.
［6］Emmens W C, Sebastiani G, Van den Boogaard A H.The technology of incremental sheet forming-A brief review of the history[J]. Journal of Materials Processing Technology, 2010, 210(8): 981-997.
［7］Jeswiet J, Micari F, Hirt G, et al. Asymmetric single point incremental forming of sheet metal[J]. Annals of the CIRP, 2005, 54(2): 623-650.
［8］Jeswiet J, Young D. Forming limit diagrams for single point incremental forming of aluminum sheet[J].Proceedings of Institution of Mechanical Engineers, Part B, Journal of Engineering Manufacture, 2005, 219(4):359-364.
［9］Duflou J R，Vanhove H，Verbert J, et al. Twist revisited: Twist phenomena in single point incremental forming[J]. CIRP Annals-Manufacturing Technology, 2010, 59(1):307-310.
［10］周六如. 金属板料数控渐进成形机理及工艺的研究[D].武汉：华中科技大学,2004.Zhou L R.Study on Principle and Process of NC Incremental Sheet Metal Forming[D]. Wuhan: Huazhong University of Science & Technology,2004.
［11］彭守桃. 金属板料渐进成形数值模拟及工艺研究[D].重庆：重庆大学,2010.Peng S T. Study on Numerical Simulation and Process of Incremental Sheet Metal Forming[D]. Chongqing: Chongqing University,2010.

服务与反馈：

【文章下载】【加入收藏】