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

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