【作者】 张更超；

【导师】 应富强；

【作者基本信息】 浙江工业大学 ， 机械电子工程， 2004， 硕士

【摘要】 楔横轧经过几十年的发展，其实践经验技术已达到很高水平。但由于楔横轧成形机理十分复杂，加之影响因素众多，理论上某些方面还有待于进一步的探讨和研究。而有限元模拟技术有助于解决这些问题，但由于有限元模拟技术在楔横轧成形模拟中的应用正处于起步阶段，其研究面较窄，人们对于阶梯轴的楔横轧成形仍采用传统的实践实验法进行研究。因此，进行楔横轧阶梯轴成形过程的有限元仿真与分析，对于楔横轧的理论发展和技术推广有着重大的意义。 本文采用有限元分析软件ANSYS／LS-DYNA，首次成功模拟了铝合金AL1100阶梯轴的楔横轧轧制全过程。并根据研究的需要，本文设计、分析了四个模型。借助于ANSYS／LS-DYNA的通用后处理器，得到了轧制过程中的应变分布云图，对轧件横截面、纵截面上的切向应变、径向应变、轴向应变、及等效应变的分布特征作了详细探讨，并给出了合理的解释。借用ANSYS／LS-DYNA的时间历程后处理器，输出了等效应变、轧制力的时间历程数据，经绘图、对比分析，总结出了轧制过程中等效应变、轧制力的变化特征，详细探讨了成形角α、展宽角β、断面收缩率ψ三工艺参数对等效应变、轧制力的影响。对进一步揭示楔横轧制过程中的轧件变形特征、应变特征、轧制力特征，指导冷楔横轧的实际生产具有一定的参考价值。更多还原

【Abstract】 With the development in past years, practice and experiment technology of crosswedge rolling has been to a high level. Yet the deforming mechanism of cross wedge rolling is quite complicated, with multitudinous factors affecting, there are still questions in theory to need discussing and researching further. Fortunately, technology of finite element simulation can help to resolving these problems. However, application of the technology used in simulating deformation of cross wedge rolling is now in initial stage, studying range of which is limited. Up to now, technicians still adopt conventional method of practice and experiment to study shaft deformation by cross wedge rolling. So simulating and analyzing shaft deformation process by cross wedge rolling has very important sense for theory developing and technology popularizing.This article successfully simulated the whole deformation process of shaft by cross wedge rolling, where material of workpiece is AL1100, with the finite element software ANSYS/LS-DYNA, totally designed and analyzed four element models for studying. Using the general post processor of ANSYS/LS-DYNA, the article showed pictures of strain distribution of workpiece during deformation, and analyzed strain distribution characters of cross section and longitudinal section, with reasonable and detail describing. In virtue of the time history post processor of ANSYS/LS-DYNA, the article gained data of strains and rolling forces of time history, by plotting and contrasting, summarized varying characters of strain and rolling forces in rolling process, further more, studied the effect on strain and rolling forces of these three technics factors, forming angle, stretching angle and section reduction. To sum up, this article has definite reference value for further discovering characters of workpiece deformation, strain distribution and rolling forces in cross wedge rolling, instructing practice and production.更多还原