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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Quick Hull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 efficiency of calculating the size of non-standard forging for stamping die design, a rapid method for calculating the size of non-standard forging for stamping die is proposed. The surface of three-dimensional forging model is discretized into three-dimensional lattice, and the minimum convex hull of the three-dimensional discrete lattice is calculated by Quick Hull algorithm. The convex hull surface is taken as the reference to calculate the box by projection and two-dimensional convex hull algorithm. The smallest three-dimensional box size. Although the tolerance box calculated by this algorithm is not the theoretical minimum tolerance box for forging geometry, the calculation accuracy and computational efficiency of this kind of non-standard forging can meet the need of material preparation for stamping die structure design.