消除穿孔毛管尾端铁耳子方法的探讨  

Approach to Preventing Tail-end Fins of Pierced Shell

作　　者：邸军[1] 李道刚[1] 

机构地区：[1]鞍钢股份有限公司无缝钢管厂,辽宁鞍山114000

出　　处：《钢管》2010年第5期55-56,共2页Steel Pipe

摘　　要：管坯穿孔时由于内外层金属变形不均匀,致使毛管尾端产生铁耳子,并在连轧工序易带入钢管内部,划伤芯棒表面和钢管内表面,铁耳子掉在机架间又会卡轧辊。通过优化设计穿孔工具(导板和顶头)以及调整轧制参数后,基本消除了铁耳子,改善了钢管质量,提高了芯棒、轧辊的使用寿命。Tail-end fins are normally produced with the pierced shell due to the fact that deformations of the outer layer metal and that of the inner layer are not consistent to each other.Such fins would very possibly get into the pipe to scratch the mandrel surface and the internal surface of the pipe during the MPM rolling process.Moreover,if the fins fall down between the mill stands,the rolls would be jammed.But now,such troublesome fins have been almost prevented by means of optimizing the piercing tools（the guide shoes and the plug）,and adjusting the rolling parameters,resulting in improvement on pipe quality,and enhancement of services spans of both the mandrel and the roll.

关 键 词：穿孔机 导板 顶头 设计 调整参数 铁耳子 消除 

分 类 号：TG335[金属学及工艺—金属压力加工]