超大直径铝合金环形锻件轧胀成形工艺与装备关键技术研究

Research on key technologies of rolling and bulging process and equipment for aluminum alloy ring forgings with ultra-large diameter

介绍了重载火箭用铝合金大型环形锻件的制作工艺,重点分析了径轴向数控轧制环形锻件的制作工艺。介绍了大型环形锻件轧制和胀形结合成形的制作工艺,采用有限元模拟了Φ10和Φ1.2 m环形锻件的轧制和胀形结合成形工艺过程,并对Φ1.2 m环形锻件的轧制和胀形成形过程进行了试验验证。结果表明:轧制和胀形结合的成形工艺技术能有效地改善产品组织,使组织更致密,提高了产品的晶粒度;轧制和胀形工艺技术能有效地提高产品的屈服强度,从而提高产品的使役性能。胀形工艺对产品有明显的整形作用。在此基础上提出Φ10 m环形锻件径轴向数控轧制和液压胀形结合的成形工艺。

The manufacturing process of aluminum alloy large ring forgings for heavy-duty rockets was introduced,the manufacturing process of radial and axial CNC rolling ring forgings was mainly analyzed.The manufacturing process of rolling and bulging for large ring forgings was proposed.The rolling and bulging process of Φ10 and Φ1.2 m ring forgings was simulated using finite element,and the rolling and bulging process of Φ1.2 m ring forgings was experimentally verified.The results show that the rolling and bulging technology can effectively improve the product structure,make the structure denser,and increase the grain size of the product.The rolling and bulging technology can effectively improve the yield strength of products,thereby improve the service performance.The bulging process has a significant shaping effect on the product.On this basis,the radial and axial CNC rolling process and hydraulic bulge forming for Φ10 m ring forgings was proposed.