张力减径机双圆弧孔型设计与实践  

Design and Actual Use of Double Circular Arc Pass of Stretch-reducing Mill

作　　者：王文强 成海涛[2] 肖永忠 王锐[3] 李静敏 WANG Wenqiang;CHENG Haitao;XIAO Yongzhong;WANG Rui;LI Jingmin(Linzhou Fengbao Pipe Co.,Ltd.,Linzhou 456592,China;Steel-rolling Branch,The Chinese Society for Metals,Beijing 100711,China;MCC CISDI Engineering Technology Co.,Ltd.,Chongqing 400013,China)

机构地区：[1]林州凤宝管业有限公司,河南林州456592 [2]中国金属学会轧钢分会,北京100711 [3]中冶赛迪工程技术股份有限公司,重庆400013

出　　处：《钢管》2021年第5期38-42,共5页Steel Pipe

摘　　要：介绍了传统孔型设计的原理和计算方法,分析了中厚壁钢管在张力减径过程中“内六方”产生的机理和控制方法;结合φ89 mm三辊连轧生产线的情况,提出了双圆弧孔型设计方案;用有限元模拟一段圆弧孔型和二段圆弧孔型轧制相同规格钢管时的情况。分析认为:双圆弧设计方案解决了内传动三辊张力减径机多边形孔型的加工问题;有限元分析结果和实践都证实了双圆弧孔型具有抑制“内六方”和控制外表面质量的优势,是三辊张力减径机孔型设计的一种新尝试。Described here in the article are the principle and calculation method for designing the conventional pass;and also analyzed are the mechanism of and the control measures for the"inner hexagonal"bore of the medium-heavy wall steel tube as developed during the stretch-reducing process.Based on the production status of the Φ89 mm 3-roll mandrel mill production line,a design solution of the double circular arc pass is proposed.The finite element(FE)method is used to simulate the rolling process with the first section circular arc pass and the second one to produce steel pipes with the same size.It is regarded via relevant analysis that thanks to the said double circular arc design solution,the difficult as met in processing the pentagonal pass of the internally-driven stretch-reducing mill is solved.And both the FE analysis and relevant actual use result lead to such a conclusion that the above mentioned double circular arc pass is advantageous in restraining occurrence of the said defective“inner hexagonal”bore,and controlling the outer surface quality,being an innovative pass design of the 3-roll stretch-reducing mill.

关 键 词：无缝钢管 张力减径机 双圆弧 内六方 孔型设计 

分 类 号：TG333.8[金属学及工艺—金属压力加工]