锻压技术

数控渐进成形板料尺寸自动确定方法研究

英文标题：Research on automatically determining sheet metal size in CNC incremental forming

作者：朱虎韩福辰林雯雯

单位：沈阳航空航天大学

关键词：板材成形数控渐进成形 STL模型

分类号：TG335.5

出版年,卷(期):页码：2013,38(6):32-36

摘要：

在板材数控渐进成形中，为满足节省材料、降低成形加工载荷的要求，提出了基于STL(Sterolithography)模型的数控渐进成形板料尺寸自动确定方法。利用板材件底面边界多边形的最小矩形包围盒确定了板料的长、宽；根据板材件厚度的正弦减薄规律确定了板料的厚度，并生成了板材件厚度分布颜色云图。通过对不同形状的板材件比较分析表明，本方法较传统方法能够节省板料9.4%~23.5%。基于有限元分析的数字模拟结果表明，采用本方法确定的板料尺寸完全可以加工成形出预期的板材件。

To meet the needs of saving materials and reducing the forming load in sheet metal computer numerical control (CNC) incremental forming, a method of automatically determining the size of the sheet metal based on STL (Sterolithography) model was proposed. The length and width of the sheet metal was determined by using the minimum area bounding rectangle of the undersurface polygon of the sheet metal part. The sheet thickness was determined according to the sine law of sheet thinning, and the color cloud picture of the sheet thickness distribution was generated. The sheet metal determined by this means was saved 9.4% to 23.5% than by the traditional one. The results of the numerical simulation based on the finite element analysis demonstrate that the sheet metal size determined by this method can be formed into the expected sheet metal.

基金项目：

国家自然科学基金资助项目(51175351)

参考文献：

［1］莫健华，韩飞. 金属板材数字化渐进成形技术研究现状[J].中国机械工程, 2008, 19(4): 491-497.Mo J H, Han F. State of the arts and latest research on incremental sheet NC forming technology [J].China Mechanical Engineering, 2008, 19(4): 491-497.
［2］Ambrogio G, Cozza V, Filice L. An analytical model for improving precision in single point incremental forming [J]. Journal of Materials Processing Technology, 2007, 191: 92-95.
［3］朱虎，杨忠凤，张伟. STL文件的应用与研究进展[J].机床与液压, 2009, 37(6): 186-189.Zhu H, Yang Z F, Zhang W. Progress in study of STL file and its application[J]. Machine Tool & Hydraulics, 2009, 37(6): 186-189.
［4］朱虎，扶建辉，刘志军. 基于STL模型的五轴激光切割轨迹生成[J]. 中国激光,2010, 37(3): 863-867.Zhu H, Fu J H, Liu Z J. Generation of 5-axis laser cutting path based on STL model [J]. Chinese Journal of Lasers, 2010, 37(3): 863-867.
［5］程鹏飞，闫浩文，韩振辉. 一个求解多边形最小面积外接矩形的算法[J]. 工程图学学报, 2008, 1(1): 122-126.Cheng P F, Yan H W, Han Z H. An algorithm for computing the minimum area bounding rectangle of an arbitrary polygon [J]. Journal of Engineering Graphics, 2008, 1(1): 122-126.
［6］Young D, Jeswiet J. Wall thickness variations in single point incremental forming [J]. Proceedings of the Institution of Mechanical Engineers Part B-Journal of Engineering Manufacture, 2004, 218(B11): 1453-1459.
［7］Hirt G, Ames J, Bambach M, et al. Forming strategies and process modelling for CNC incremental sheet forming[J]. Annals of the CIRP, 2004, 53(1): 203-206.
［8］李楠. 板材五轴数控渐进成形轨迹生成研究[D]. 辽宁：沈阳航空航天大学, 2011.Li N. A Study of Forming Path Generation for Sheet Metal 5-Axis CNC Incremental Forming[D]. Shenyang: Shenyang Aerospace University, 2011.
［9］肖士昌，高锦张，贾俐俐，等. 单道次渐进成形锥形件壁厚均匀临界成形角的研究[J]. 锻压技术, 2012, 37(2): 49-54.Xiao S C, Gao J Z, Jia L L, et al.Research on critical forming angle of uniform thickness in single-path incremental forming for conical part [J]. Forging & Stamping Technology, 2012, 37(2): 49-54.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】