锥形穿孔机488 mm系列孔型优化研究  

Optimization of 488 mm Series Pass of Cone Type Piercer

作　　者：高建学 张永胜 王洪瑞 GAO Jianxue;ZHANG Yongsheng;WANG Hongrui(Tianjin Pipe Co.,Ltd.,Tianjin 300301,China)

机构地区：[1]天津钢管制造有限公司,天津300301

出　　处：《钢管》2024年第3期61-66,共6页Steel Pipe

摘　　要：为解决Φ460 mm PQF连轧管机组穿孔机488 mm系列孔型扩径率大、毛管内螺旋严重且尾部不规则等问题,用Φ450 mm管坯代替Φ400 mm管坯,通过优化改进穿孔辊,将轧辊入口锥角一段角度2.5°改为3°;根据理论以及生产经验,选取经验参数,对导板和顶头尺寸进行优化设计,并进行生产验证。实践表明:优化设计后的488 mm系列孔型,穿孔机轧制工具设计更合理,穿轧过程更稳定,毛管的尺寸精度和内外表面质量也显著提升,满足了PQF连轧管机组生产工艺的要求。In order to solve the problems as staying with the 488 mm series pass of the piercer of theФ460 mm PQF mandrel pipe mill,i.e.,high expansion rate,serious shell inner surface spiral defect,and irregular tail end,etc.,countermeasures are taken,including replacing theФ400 mm billet with theФ450 mm billet,changing the angle of the roll inlet cone first section from 2.5°into 3°via optimizing the piercing roll,and optimizing the dimensional design of the guide shoe and the plug via determining empirical parameters based on theoretic data and actual production experiences,and then performing production verification.Relevant practice shows that owing to optimized design of the 488 mm series pass,the design of the rolling tools of the piercer is more reasonable,the piercing process is more consistent,the dimensional accuracy and the outer and inner surface quality of the shell are significantly improved,having met the requirements for the PQF manufacturing process.

关 键 词：穿孔机 管坯 孔型 工具设计 毛管质量 

分 类 号：TG333[金属学及工艺—金属压力加工]