摘要
目的对比某型号轮毂成形的工艺方案。方法对轮毂在不同条件下的成形过程进行了数值模拟和实验研究,分析成形工艺对应力分布、应变分布、金属流动速度场、成形载荷及内部组织的影响。结果坯料在800℃下采用闭式模锻所需成形载荷小,模具结构较简单,内部组织为粒状珠光体,力学性能优于其他2种方案下的内部组织魏氏体。结论闭塞式挤压和闭式模锻成形等效应力、等效应变、金属流动速度场、成形载荷及内部组织各不相同。模拟结果可以指导实际生产中工艺方案的选择。
This experiment compared processing plans for forming of a certain type of hub. The numerical simulation and the experimental research of the forming process of hub were conducted under different conditions to analyze the influence of the forming process on stress distribution,strain distribution,metal flow velocity,forming load and internal organization. The results showed that the forming load for workpieces at 800 ℃ by closed die forging was low,and under this condition,the internal organization was granular pearlite,the mould structure was simple and the mechanical properties of the internal organization were better than those of the widmanstatten under the conditions in the other two processing plans.In conclusion,the closed die extrusion and the closed die forging have differences in the equivalent stress,the equivalent strain,the metal flow velocity and the internal organization. The simulation result is instructive for the choice of the actual production process.
出处
《精密成形工程》
2015年第4期42-47,共6页
Journal of Netshape Forming Engineering
关键词
有限元
闭式模锻
闭式挤压
finite element
closed die forging
closed extrusion
