三辊行星轧制中轧辊轧件接触区分布的计算改进  

Improved calculation of the contact region distribution between roller and workpiece during three-roll planetary rolling

作　　者：刘一[1] 王经涛[1] 刘瑛[1] 

机构地区：[1]南京理工大学材料科学与工程学院,江苏南京210024

出　　处：《锻压技术》2015年第12期60-66,共7页Forging & Stamping Technology

基　　金：教育部科学技术研究重大项目(311035);国家自然科学基金青年基金资助项目(51304123)

摘　　要：三辊行星轧制中,轧辊轧件接触区的分布是轧制力能参数的计算基础。在轧制过程中轧件的轴向延伸变形不可避免,这将直接影响到轧辊轧件接触区的分布。在已有的研究基础上,考虑到轧制过程中轧件轴向延伸变形的影响,运用理论分析得出了接触区的分布函数。给定轧制工艺参数,利用数值计算得到了轧辊轧件接触区分布的具体情况,结果显示,受到轧件轴向延伸的影响,轧辊轧件接触区变得更为狭窄。该结果不仅相比于已有的研究更加符合三辊行星轧制中的轧辊轧件实际的接触情况,还表明接触区的分布不仅只受到轧制常数、倾斜角、偏转角、轧辊转速和轧件进给速度的影响,同时还受到轧件的原始尺寸的影响。During the three-roll planetary rolling, contact region distribution between roller and workpiece is the basis of the calculation of the rolling power. In the process of rolling, the extension deformation along the rolling axis of the workpiece is inevitable, and the contact region distribution is affected directly. On the basis of existing research, considering the influence of axial extension deformation of work- piece in rolling, the function of the contact region distribution was obtained by theoretical analysis. The parameters of the rolling process were given, and the specific distribution of contact region was numerically simulated. Results show that the contact region between roller and workpieee becomes narrow under the influence of the axial extension deformation of the workpiece. The results are not only more consistent with the actual contact situation between roller and workpieee than that in existing research, but also show that the distribution is affected by the rolling constant, inclined angle, offset angle, rolling speed and feeding speed of workpiece as well as the original size of workpiece.

关 键 词：三辊行星轧制 接触区分布 轴向延伸变形 

分 类 号：TG335[金属学及工艺—金属压力加工]