锻压技术

冲压模具非标锻件备料尺寸的快速计算方法

英文标题：Fast calculation method of stamping die with non-standard forging stock size

作者：刘辉章志兵柳玉起

单位：华中科技大学

关键词：冲压模具非标锻件备料尺寸

分类号：TG386

出版年,卷(期):页码：2015,40(6):6-9

摘要：

为了提高冲压模具设计时计算非标锻件备料尺寸的效率，提出了一种冲压模具非标锻件备料尺寸的快速计算方法。将三维锻件模型的表面离散为三维点阵，利用QuickHull算法计算三维离散点阵的最小凸包；以凸包的各表面为基准，通过投影和二维凸包算法计算包容盒，通过比较获得最小的三维包容盒尺寸。该算法计算的包容盒虽然不是锻件几何体在理论上的最小包容盒，但针对这类非标锻件来说，其计算精度和计算效率能够满足冲压模具结构设计时的备料需要。

In order to improve the calculation efficiency of non-standard forging stock size in stamping die design, a fast calculation method was proposed. The surface of 3D forging model was discreted into 3D lattice, and the minimum convex hull of the discrete lattice was calculated by QuickHull algorithm. On the basis of each convex hull surface, the sizes of 3D bounding box were calculated by projection and 2D convex hull algorithm, and then the minimum size could be obtained by comparison. The bounding box calculated by this algorithm was not the minimum bounding box of 3D forging model in theory, but calculation accuracy and efficiency could meet the stock requirement for the forging parts.

基金项目：

材料成形与模具技术国家重点实验室资助项目（20131449）

刘辉（1990-），男，硕士研究生。通讯作者：章志兵（1978-），男，博士，讲师。

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