基于AutoCAD的钣金自动展开及排样优化

针对传统钣金生产过程中的效率低下、精度不高、材料浪费等缺点，提出基于CAD自动化技术的钣金展开及排 样优化应用系统，设计了系统的整体流程结构；借助于旋转最低水平线的遗传算法、最小矩形包络法和平移靠接算法为 核心，分别处理规则矩形和不规则矩形的排样优化问题。开发了基于AutoCAD应用平台的钣金展开及排样优化的插件 系统，该系统主要由参数化绘图、三维图显示、确定图幅及尺寸精度等功能组成；最后通过实例应用，表明该系统能有效 提高钣金生产的效率和制造精度，降低材料浪费率。

Automatic Unfolding and Layout Optimization of Sheet Metal Based on AutoCAD

In order to solve the inefficiency and time consuming problems in traditional sheet metal production process, the sheet metal unfolding and layout optimization application system was proposed based on CAD automation. The whole process of structural system was designed. With the help of the relevant algorithm based on rotating the lowest horizontal line. the smallest rectangle envelope method and the translational inarch algorithm. the problems of layout optimization of rectangle and irregular rectangle were managed respectively. The plug-in system of automatic unfolding and layout optimization of sheet metal based on AutoCAD. The system was mainly composed of parametric drawing, three- dimensional map display, determination of the map and dimensional accuracy and other functional components. Finally, through the example application. the system can effectively improve the production efficiency and manufacturing precision, and reduce material wastage rate.