Numerical shape optimization of cold forging tools by means of FEM/BEM simulation
Numerical shape optimization of cold forging tools by means of FEM/BEM simulation
复制标题
通过 FEM/BEM 模拟对冷锻模具进行数值形状优化
DOI：
10.1007/s12289-016-1321-8
复制
发表时间：
2016
影响因子：
2.4
通讯作者：
Trauth
中科院分区：
文献类型：
--
作者：
Klocke;Ozhoga-Maslovskaja;Schongen;Feuerhack;Trauth
冷锻工具几何形状的数值形状优化的过程允许工具载荷应力的减小和均匀化。该程序考虑了工件-刀具-机床的相互作用，通过有限元/边界元耦合。耦合需要修改，以确保在TOSCA软件中的准确集成，以进一步优化形状。由此产生的节点位移和刀具几何形状的变化的分布进行了讨论和分析。此外，数值验证的结果，通过机械模拟的优化几何与扩展的FEM/BEM模型。给出了侧向挤压结束时模具和工件中的等效应力分布。数值形状优化导致压肩上的最大等效应力值降低到856 MPa，与初始几何形状相比降低了24.3%。负载引起的工件偏差的补偿方法，包括所述的优化过程，以及。
The procedure of a numerical shape optimization of the cold forging tool geometry allows for a reduction and a homogenization of tool load stresses. This procedure considers the workpiece-tool-machine interaction by means of the FEM/BEM coupling. The coupling requires modifications to insure accurate integration in TOSCA software for further shape optimization. The resulting distribution of the nodal displacements and changes of tool geometry are discussed and analyzed. Additionally, the numerical validation of the results by means of mechanical simulation of the optimized geometry with the extended FEM/BEM model is given. The equivalent stresses distribution at the end of lateral extrusion in the tool and in workpiece is presented. The numerical shape optimization leads to the maximum equivalent stress value reduction on the press shoulder on 856 MPa, corresponding to a percentage decrease of 24.3 % in comparison with the initial geometry. The approach for the compensation of load induced workpiece deviations, involving the described optimization procedure, is presented as well.