锻压技术

双面数控渐进成形仿真系统

英文标题：Simulation system for double sided CNC incremental forming

作者：肖冬选朱虎姜在宽

分类号：TG485

出版年,卷(期):页码：2018,43(1):46-52

摘要：

为解决双面数控渐进成形由于采用两个工具头而导致的成形轨迹复杂且容易发生错误的问题，提出一种基于二重点阵模型的双面数控渐进成形仿真方法。根据双面数控渐进成形的特点，采用二重点阵模型表示板材上下表面，判断二重点阵的点与工具头、点与工具头成形轨迹扫略区域的位置关系，将成形板材件的形状变化转化为点阵模型中点的位移变化，对点进行位移变换并重构为面，最终形成成形件的仿真模型；根据渐进成形中板材厚度减薄正弦规律，给出了成形件厚度分布云图；利用VC++和OpenGL开发了双面数控渐进成形专用仿真软件。算法实例表明，所开发的软件系统能够模拟仿真双面数控渐进成形板材变形过程，可进行成形轨迹检测、厚度分布云图显示及成形性判断，运行稳定可靠，具有可应用性。

For the problems of complicated forming trajectory and error prone produced by two tool heads in the double sided CNC incremental forming, a numerical simulation method of double sided CNC incremental forming was proposed based on double lattice model. According to the characteristics of double sided CNC incremental forming, the double lattice model was used to represent the upper and lower surfaces of sheet, and the position relationships between points of double lattice and tool head, points of double lattice and travelling area of tool head forming path were determined. Then, the shape change of forming sheet was transformed into the displacement change of points of lattice model. The points were conducted displacement transformation to reconstruct the surface, and the simulation model was set up to produce forming part at last. Furthermore, according to the sine law of thickness thinning for sheet in the incremental forming, the thickness distribution nephogram was displayed, and the special simulation software system of double sided CNC incremental forming was developed by VC++ and OpenGL. The algorithm example proves that the developed software system can simulate the deformation process of double sided CNC incremental forming, and the code detection of forming trajectory, the display of thickness distribution nephogram and the judgment of sheet formability can be carried on. Thus, the operation of the developed software system is stable and reliable, and the software system is applicable.

基金项目：

辽宁省自然科学基金资助项目(2014024011)

作者简介：肖冬选(1991-)，男，硕士研究生，E-mail：17757515241@163.com；通讯作者：朱虎(1964-)，男，博士，教授，E-mail：zhuhu10@163.com

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]周建宇, 杨明顺, 李言,等. 金属板料单点渐进成形下压点分散的等高线混合成形轨迹生成[J]. 锻压技术, 2017, 42(2):38-44.

Zhou J Y, Yang M S, Li Y, et al. Generation of contour-mixed forming trajectories of the pressure points dispersion under single point incremental forming for sheet metal[J]. Forging & Stamping Technology, 2017, 42(2):38-44.

[3]王华毕, 魏目青, 徐旺丁. 缓面零件单点渐进成形刀具轨迹优化数值模拟[J]. 塑性工程学报, 2017, 24(3):90-95.

Wang H B, Wei M Q, Xu W D. Numerical simulation of tool path optimization for surface parts in single point incremental forming[J]. Journal of Plasticity Engineering, 2017, 24(3):90-95.

[4]Huang Y, Wang Y J, Cao J, et al. Prediction of forming limit in single point incremental forming with the ductile fracture criterion[J]. ASME International Manufacturing Science and Engineering Conference, 2007, 68(2): 929-934.

[5]朱虎, 杨晓光. 五轴数控渐进成形干涉检测与修正研究[J]. 机械工程学报, 2014, 50(7): 168-175.

Zhu H, Yang X G. A study on the interference detection and correction in 5-axis CNC incremental forming[J]. Journal of Mechanical Engineering, 2014, 50(7): 168-175.

[6]张志刚, 王进, 李丽华. 点压渐进成形工艺的数值模拟研究[J]. 锻压技术, 2016, 41(3):134-139.

Zhang Z G, Wang J, Li L H. Research on numerical simulation of the incrementally pressing forming process[J]. Forging & Stamping Technology, 2016, 41(3):134-139.

[7]Malhotra R, Cao J, Beltran M, et al. Accumulative-DSIF strategy for enhancing process capabilities in incremental forming[J]. CIRP Annals-Manufacturing Technology, 2012, 61(1): 251-254.

[8]Zhu H, Liu Z J, Li N. The control of the gap between tool and support, and the analysis of its effect on the accuracy of CNC incremental forming[J]. Advanced Materials Research, 2012, 510: 368-374.

[9]韦红余. 金属板料渐进成形质量控制关键技术研究[D]. 南京: 南京航空航天大学, 2010.

Wei H Y. Research on Quality Control Key Technical of Sheet Metal Incremental Forming[D]. Nanjing: Nanjing University of Aeronautics and Astronautics, 2010.

[10]Zhu H, Liu Z J, Kang J. A study on the digital simulation for sheet metal CNC incremental forming based on Z-map[J]. Advanced Materials Research, 2011, 201-203: 99-102.

[11]Lingam R, Prakash O, Belk J H, et al. Automatic feature recognition and tool path strategies for enhancing accuracy in double sided incremental forming[J]. International Journal of Advanced Manufacturing Technology, 2017, 88(5): 1639-1655.

[12]刘伟军. 快速成型技术及应用[M]. 北京: 机械工业出版社, 2005.

Liu W J. Rapid Prototyping Technology and Application[M]. Beijing: China Machine Press, 2005.

[13]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(11): 1453-1459.

[14]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.

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