锥形辊穿孔机非对称导板的设计及应用  

Design and application of asymmetric guide plate for cone shaped roll piercer

作　　者：朱智禄 侯双平 刘建群 王燕飞 王晓晨[2] ZHU Zhilu;HOU Shuangping;LIU Jianqun;WANG Yanfei;WANG Xiaochen(φ180mill,Hengyang Valin Steel Tube Co.,Ltd.,Hengyang 421001,China;National Engineering Research Center of Flat Rolling Equipment,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]衡阳华菱钢管有限公司180厂,湖南衡阳421001 [2]北京科技大学国家板带生产先进装备工程技术研究中心,北京100083

出　　处：《轧钢》2025年第1期127-134,共8页Steel Rolling

基　　金：国家重点研发计划项目(2023YFB3712400)。

摘　　要：对称导板广泛应用在无缝钢管斜轧穿孔变形工序中,而服役环境恶劣的导板表面经常出现结瘤、粘钢或局部熔融现象,进而引起钢管产品外表面螺旋形划伤、内表面内折等缺陷。为此,采用理论计算与有限元仿真相结合的方法,设计了一种新型的非对称导板。非对称导板总体设计思想遵循传统对称导板的设计基本原则,但非对称导板的结构除了上下结构的非对称性之外,其水平方向的几何曲线也在对称导板的基础上作了调整。改进后的非对称导板有效地增大了导板与轧件的接触区域,减小了导板与轧件的接触应力、等效应力和受力值,对提升轧制产品质量和导板寿命都有积极作用。工业实践结果表明:锥形辊穿孔机非对称导板入口锥结构的设计使用,大幅度减少了导板入口锥表面的撞伤熔融现象,从而减少了毛管被导板表面划伤导致的螺旋外折缺陷;非对称导板出口锥结构的设计使用,基本消除了钢管尾部内表面内折、内翘皮缺陷,且改善了导板出口锥段的小结瘤缺陷,改善毛管外表质量和归圆效果,降低穿孔工序卡轧风险;非对称导板上下非对称差量结构的设计使用,使导板磨损区域居于正中,解决了导板上下表面“崩边”问题,同时改善了毛管尾部“鱼尾”缺陷。Symmetric guides are widely used in the slant rolling piercing process of seamless steel pipes.However,due to the harsh service environment,the surfaces of the guide plates often suffer from nodules,steel adhesion,or partial melting,which in turn leads to defects such as spiral scratches on the outer surface and inner folds on the inner surface of the steel pipe products.Therefore,a novel asymmetric guide plate was designed by combining theoretical calculations with finite element simulations.The overall design concept of the asymmetric guide plate follows the basic principles of traditional symmetric guide plates,but the structure of the asymmetric guide plate not only has an asymmetric upper and lower structure but also has an adjusted geometric curve in the horizontal direction based on the symmetric guide plate.The improved asymmetric guide plate effectively increases the contact area between the guide plate and the rolled piece,reduces the contact stress,equivalent stress and force value,and plays a positive role in improving the quality of rolled products and the life of the guide plate.The industrial practice results show that the design and use of entrance cone structure of the asymmetric guide plate of cone shaped roll piercing mill have greatly reduced the impact and melting phenomena on the surface of the guide plate's entrance cone,thereby reducing the spiral outer fold defects caused by the guide plate's surface scratching the billet.The design and use of exit cone structure of the asymmetric guide plate have basically eliminated the inner folds and inner skin defects on the tail end of the steel pipe,and improved the small nodule defects of the guide plate's exit cone section,improved the appearance quality and circularization effect of the billet,and reduced the risk of jamming in the piercing process.The design and use of the asymmetric guide plate's upper and lower asymmetric difference structure have made the wear area of the guide plate in the center,solving the"crumbling edge"problem of the up

关 键 词：无缝钢管 斜轧穿孔机 非对称导板 有限元仿真 结瘤缺陷 螺旋外折缺陷 

分 类 号：TG3[金属学及工艺—金属压力加工]