自动轧管横向壁厚精度研究  

Study on transverse wall thickness accuracy of tube rolled by automatic plug mill

作　　者：尹元德[1,2] 汪婷 王纯凯 郭照生 李珺 章明 YIN Yuande;WANG Ting;WANG Chunkai;GUO Zhaosheng;LI Jun;ZHANG Ming(Ministry of Education Key Laboratory of Metallurgical Emission Reduction and Comprehensive Utilization of Resource,Anhui University of Technology,Ma'anshan 243002,Anhui,China;School of Metallurgy Engineering,Anhui University of Technology,Ma'anshan 243002,Anhui,China;Jiangsu Changbao Pulaisen Seamless Steel Tube Co.,Ltd.,Changzhou 213200,Jiangsu,China)

机构地区：[1]安徽工业大学冶金减排与资源综合利用教育部重点实验室,安徽马鞍山243002 [2]安徽工业大学冶金工程学院,安徽马鞍山243002 [3]江苏常宝普莱森钢管有限公司,江苏常州213200

出　　处：《钢铁研究学报》2022年第9期981-990,共10页Journal of Iron and Steel Research

基　　金：钢铁联合基金重点资助项目(U186021)。

摘　　要：针对自动轧管机轧制薄壁不锈钢管中出现的严重横向壁厚不均问题,借助于三维有限元分析软件Simufact,对X10CrNiTi18不锈钢管典型规格Ф112 mm×4.5 mm自动轧管过程进行数值模拟。研究了不同轧辊孔型结构参数、芯棒润滑状态、轧辊孔型磨损及穿孔毛管偏心对自动轧管横向壁厚精度的影响。结果表明:随着芯棒摩擦因数的增大,所轧荒管横向壁厚精度明显恶化;偏心毛管轧制所轧荒管依旧偏心,延伸轧制对穿孔毛管偏心壁厚纠偏能力有限;磨损的孔型修模后,采用负芯补轧制较增大芯棒直径轧制所轧荒管横向壁厚不均度增大;采用三段式圆弧孔型,所轧荒管横向平均壁厚更接近目标壁厚,横向壁厚不均度由原孔型的13.55%下降到9.94%,横向壁厚精度明显改善。In view of serious uneven transverse wall thickness of thin-walled stainless steel tube rolled by automatic plug mill,the automatic tube rolling process of X10 CrNiTi18 stainless steel tubes with typical specification ofФ112 mm×4.5 mm was numerically simulated by using 3 D finite element analysis software Simufact.The influence of different roll pass structure parameters,different mandrel lubrication state,roll pass wear and eccentricity of pierced shell on transverse wall thickness accuracy of automatic rolling tube was analyzed.The results show that as the friction coefficient of the mandrel increases,the accuracy of transverse wall thickness of the rolled tube deteriorates obviously.The hollow tube rolled by eccentric pierced shell is still eccentric,and it shows that the elongation rolling has a limited ability to correct the eccentric wall thickness of the pierced shell.With repaired the worn pass,the unevenness of the transverse wall thickness of the rolled tube increases using the negative mandrel compensation rolling compared with the increase of mandrel diameter.The average transverse wall thickness of the rolled tube is closer to the target wall thickness by using three-section arc groove,and the transverse wall thickness unevenness decreases from 13.55%of the original groove to 9.94%,and the transverse wall thickness accuracy is obviously improved.

关 键 词：不锈钢管 自动轧管机 横向壁厚精度 金属流动 数值模拟 

分 类 号：TG335.7[金属学及工艺—金属压力加工]