辊锻模数字化设计

Digital design of roll-forging moulds

为解决辊锻模设计中CAD造型复杂、耗时的问题,文章从逆向工程的思想出发,提出了一种通用的全数字化辊锻模具设计技术,通过对数字模型或实物进行离散化,生成密集点云。再利用提出的圆弧弯曲变形算法,逐点进行变形计算,得到辊锻模的离散点云。在此基础上可进一步自动生成模具的三角面片数字模型甚至曲面模型。所提出的设计方法可以直接由实物生成辊锻模具,可简化辊锻模具数字模型的生成过程,且不受模具复杂程度的限制。以汽车连杆辊锻模具的设计为例,阐述了从实物到最终模具数字模型建立的全部过程。

In order to resolve CAD model-building problems during the design of roll-forging moulds, a general digital method that is used to design roll-forging is presented, based on reverse engineering. Firstly, the digital model or real object is dispersed and comes into dense point cloud. Next, the point data is respectively transformed by the algorithm of arc-deformation and the dispersed point cloud of roll-forging moulds is gained. Finally, the triangular patch model or surface model is built. By the design method in the paper, the roll-forging moulds can directly be built from real object, which not only simplifies the process of digital model-building of roll-forging moulds, but also eliminates the impact of complexity of moulds. Taking the design of roll-forging moulds of auto connecting rods as an example, the whole course of digital model-building from real objects to moulds is expatiated.