傾 斜 機 能 ラ 亍 イ ス 構 造 に よ る 構 造 体 表 面 の 接 触 反 力 最 適 化

In the contact phenomenon on the die surface during forging, it is essential to equalize the reaction force. In recent years, improvements in additive manufacturing technology have made it possible to form a lattice structure inside a structure. In this study, we aim to achieve uniformity of the surface reaction force at contact by optimizing the combination of lattices inside a structure that mimics a mold. The lattice is treated as a bulk material with effective stiffness, and the effective stiffness is Calculated by the ho mögen i zat i on method. The effective stiffness is calculated using the homogenization method. Multiple types of lattice structures are combined with increasing the range of feasible stiffness. The lattice shape inside the structure is updated by referring to the concept of fully stressed design, in which the proposed design is updated by an updating equation based on arbitrarily set stresses. Finally, a finite element analysis is performed to model the detailed lattice geometry and to verify the performance of the obtained optimal structure. As a result, the gap between the maximum and minimum surface reaction force is less than one-eighth of the conventional design, and it is confirmed that the proposed method is effective in equalizing the surface reaction force.