722联接环成形分析及有限元模拟

722联结环是用于煤矿井下的关键部件，要求有很高的抗拉性能和抗疲劳性能。采用原有成形工艺经常产生折迭、充不满等诸多问题。为了解决这一问题本文采用DELFORM 3D塑性有限元模拟分析系统，建立了722联接环热成形工艺的刚塑性有限元模型，用三维有限元法对722联接环成形工艺进行了模拟分析，预测成形缺陷的产生，针对原有工艺出现的问题进行了改进及优化。模拟发现，采用原工艺的平底仓部，不利于金属向四周排除，且金属流动激烈，易产生缺肉和折迭，致使锻件报废。基于模拟分析结果，在终锻模膛中采用带仓连皮，从而有效地避免了折迭的产生，减小了坯料的尺寸，使材料利用率大大提高，而且由于连皮周边较薄，易于冲除，提高了切边模模的寿命。

Forming analysis and FEM simulation of 722 link ring

Link Ring is the key part of coal mine well, so it is requested to have a very high anti pull and anti-fatigue function Many defects usually appeared in the original forming process, such as enfold and short of materialSo in this paper we uses DEFORM 3D FEM simulation and analysis system, establishes the rigid plasticity finite element model of 722 link ring hot forming processThen its forming process is simulated and analyzed by 3D FEM and the defects are predictedThe original forming process is improved and optimized as there some defectsThrough the simulating, we found that the material flows furiously in the original process of flat bottomed storage, so it is easy to result enfold and short of material condition Based on the simulating results, an improved die is designed to avoid the enfold effectively and can get the qualified forging At the same time, it lowers the depletion of the material, increases the utilization ratio of materialand also because the periphery of the connect skin is thin, it is easy to be resected, so the life time of the die is increased