钢管“内六方”成因分析及对策  

Causes for Internal Hexagonal Shape of Steel Tube and Countermeasures

作　　者：赵晓林[1] 边勇兴 

机构地区：[1]天津钢管有限责任公司,天津300301

出　　处：《钢管》2004年第3期35-38,共4页Steel Pipe

摘　　要：天津钢管有限责任公司引进德国曼内斯曼-德马克公司的Φ250mm三辊微张力减径机,该机采用14架集中差速传动。对于小直径的厚壁钢管,定径过程中容易出现“内六方”现象。分析了微张力减径机在生产过程中,因减径机速度设置不当使钢管产生“内六方”的原因,提出了合理设计孔型并优化减径机主电机、叠加电机转速的解决对策。经生产实践,成品管“内六方”度量值变小,效果良好。The Φ250 mm 3-roll, slight-stretch reducing mill of Tianjin Steel Tube Co. is imported from Mannesmann Demag, Germany. It employs a centralized differential drive system for all of its 14 roll stands, which means in case of rolling small-sized heavy-wall tubes, internal hexagonal shape is apt to occur during sizing. It is identified that improper speed setting of the mill is responsible for formation of the said internal hexagonal defect of the tube. Accordingly, corrective actions are proposed and implemented, including more effective groove design and optimizing the speeds of the main motor and the superimposed motor. As a result, the internal hexagonal defect of the final tube has been obviously reduced.

关 键 词：无缝钢管 内六方缺陷 成因 分析 对策 

分 类 号：TG333[金属学及工艺—金属压力加工]