Role of Friction in Cold Ring Rolling

作     者：He YANG+, Lianggang GUO and Mei ZHAN College of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China 

作者机构：College of Materials Science and Engineering Northwestern Polytechnical University Xi'an 710072 China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2005年第21卷第6期

页      面：914-920页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：The authors thank the National Natural Science Foundation of China for Key Program of China(No.50335060) the National Science Found of China for Distinguished Young Scholars(No.50225518)for the support on this research 

主　　题：Cold ring rolling Friction Elastic-plastic dynamic explicit FEM ABAQUS 

摘      要：Cold ring rolling is an advanced but complex metal forming process under coupled effects with multi-factors, such as geometry sizes of rolls and ring blank, material, forming process parameters and friction, etc. Among these factors, friction between rolls and ring blank plays an important role in keeping the stable forming of cold ring rolling. An analytical method was firstly presented for proximately determining the critical friction coefficient of stable forming and then a method was proposed to determine the critical friction coefficient by combining analytical method with numerical simulation. And the influence of friction coefficient on the quality of end-plane and side spread of ring,rolling force, rolling moment and metal flow characteristic in the cold ring rolling process have been explored using the three dimensional （3D） numerical simulation based on the elastic-plastic dynamic finite element method （FEM） under the ABAQUS software environment, and the results show that increasing the friction on the contact surfaces between rolls and ring blank is useful not only for improving the stability of cold ring rolling but also for improving the geometry and dimension precision of deformed ring.