轴类零件冷锻成形的预成形工步设计及优化  

Preform step design and optimization of cold forming for axial parts

作　　者：霍中雪[1] 高锦张[1] 贾俐俐[2] 

机构地区：[1]东南大学材料科学与工程学院江苏省先进金属材料高技术研究重点实验室,江苏南京211189 [2]南京交通职业技术学院,江苏南京211188

出　　处：《锻压技术》2012年第4期22-29,共8页Forging & Stamping Technology

摘　　要：以大高径比轴对称锻件的预成形设计为例,以预锻工步多目标的优化设计为目的,提出一种预成形新方法。从给定的最终成形件形状出发,基于Deform-3D软件进行数值模拟,采用正向设计,初步计算各预成形工步的几何参数,充分考虑了模腔的充填、降低终锻力、提高变形均匀性及减小材料最大损伤值等方面因素后,从终锻工步出发,逆向调试并优化各预成形工步的参数,并将模拟结果与实验结果作比较。实验结果表明,逆向技术在多工步锻造的预成形工步设计上具有指导意义。Taking preform design of an axisymmetric forging with large ratio of height to diameter as an example, aiming to achieve multiple-target optimization design for pre-forging steps, a new preform method was put forward. Pro- ceeding from the shape of final forging, numerical simulation was based on Deform-3D. By forward design, geometric parameter of each pre-forging step was preliminarily calculated. Taking full consideration of cavity filling, decrease of final forging force, increase of deformation uniformity and reduction of maximum material damage, the parameters of each preform step were debugged conversely and optimized from final forging step. A comparison was made between the simulation result and the experiment result. The experimental results show that the reverse technology is instructional to preform step design of multi-step forming.

关 键 词：轴对称锻件 预成形设计 多目标优化 逆向调试 

分 类 号：TG316[金属学及工艺—金属压力加工]