锥台复合截面环件精密轧制毛坯的优化设计方法

发布时间：2018-06-27 14:45

  本文选题：锥台复合截面环件 + 环件轧制　； 参考：《锻压技术》2017年08期

【摘要】：针对广泛用于油气管道阀门、航空发动机机匣及结合环中的锥台复合截面环件较难同时获得所需的直径尺寸和台阶形状的问题,提出"等壁厚型"和"变壁厚型"两种环坯设计方法。借助ABAQUS模拟平台,建立两种轧制环坯设计下的锥台复合截面环件轧制过程的有限元仿真模型,分析两种环坯轧制过程中的台阶充型规律及最终的成形环件尺寸误差。结果表明,"变壁厚型"环坯比"等壁厚型"环坯轧制成形后尺寸精度高。为获得最优的尺寸精度,在"变壁厚型"环坯设计基础上,添加尺寸修正系数η。通过对比不同修正系数η下的环坯轧制成形尺寸精度,得出尺寸修正系数η在1η1.1范围内的"变壁厚型"环坯为最优环件轧制毛坯。基于模拟结果,在WD51Y-250多功能轧环机上进行锥台复合截面环件轧制实验,验证有限元模拟的可靠性和环坯设计方案的可行性。
[Abstract]:In view of the problem that it is difficult to obtain the required diameter size and step shape simultaneously for the composite cross section ring of conical platform in widely used oil and gas pipeline valves, aeroengine casing and coupling ring, Two kinds of ring blank design methods, equal wall thickness type and variable wall thickness type, are put forward. Based on Abaqus simulation platform, the finite element simulation model for the rolling process of two kinds of rolling ring billet with composite cross section is established, and the step filling law and the final size error of the forming ring are analyzed in the rolling process of the two kinds of ring billet. The results show that the size accuracy of "variable wall thickness" ring blank is higher than that of "equal wall thickness" ring blank after rolling. In order to obtain the optimal dimensional accuracy, the dimension correction coefficient 畏 is added on the basis of the design of "variable wall thickness" ring blank. By comparing the dimensional accuracy of ring billet rolling with different correction coefficients 畏, it is concluded that the "variable wall thickness" ring blank with dimension correction coefficient 畏 in the range of 1 畏 1.1 is the optimal ring rolling blank. Based on the simulation results, the rolling experiment of the composite section ring on the WD51Y-250 multifunctional ring mill is carried out, which verifies the reliability of the finite element simulation and the feasibility of the ring blank design scheme.
【作者单位】： 武汉理工大学材料科学与工程学院;武汉理工大学现代汽车零部件技术湖北省重点实验室;武汉理工大学汽车工程学院;
【基金】：江苏省重点研发专项(BE2016009) JGXM(201607GC01)
【分类号】：TG335
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本文编号：2074260