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为了改善轧制环件的应变分布、提高环件组织性能,提出环件双驱动轧制成形工艺方法。以5A02铝合金环件为研究对象,通过有限元分析方法对环件双驱动轧制过程进行研究,重点分析了不同的芯辊转速对环件轧制力能参数、等效应变分布以及成形精度等的影响规律。结果表明,双驱动轧制成形相比常规环件轧制工艺,环件沿径向等效应变分布的均匀性提高了50%,且轧制过程中环件的形状精度保持性好,有利于改善环件的组织分布均匀性,提高轧制环件的综合力学性能。根据仿真计算结果,制定较优的环件双驱动轧制工艺方案,并进行环件轧制试验和显微组织分析,双驱动轧制环件内部枝晶相均匀分布且细小,弥散质点分布均匀,验证了该工艺方案的有效性。
In order to improve the strain distribution of the rolling rings and improve the microstructure and properties of the rings, a dual-drive rolling process of the rings is proposed. Taking the 5A02 aluminum alloy ring as the research object, the dual-driven rolling process of the ring was studied by means of finite element analysis. The influence of the different rotating speed of the core roller on the rolling force energy parameters, the equivalent strain distribution and the forming accuracy The impact of law. The results show that compared with the conventional ring rolling process, the uniformity of radial equivalent strain distribution of the ring increases by 50% compared with that of the conventional ring rolling, and the shape accuracy retention of the ring is good during rolling, which is beneficial to improve The uniformity of the organization of the rings improves the overall mechanical properties of the rings. According to the simulation results, a better double-driven ring rolling process is developed, and the ring rolling test and microstructure analysis are carried out. The dendritic phase in the double-driven rolling ring is uniformly distributed and small, and the dispersive particles are evenly distributed , Verify the effectiveness of the process plan.