卷取机旋转头螺栓断裂原因分析及对策  

Cause analysis and countermeasures of coiler rotating head bolt fracture

作　　者：刘冰扬 于超超[1] 曾小明[1] 杨世勇[1] 李旭[1] LIU Bing-yang;YU Chao-chao;ZENG Xiao-ming;YANG Shi-yong;LI Xu(Shougang Jingtang United Iron and Steel United Co.,Ltd.,Tangshan 063200,China)

机构地区：[1]首钢京唐钢铁联合有限责任公司,河北唐山063200

出　　处：《重型机械》2021年第6期91-94,共4页Heavy Machinery

摘　　要：基于生产现场发生的卷筒旋转头联接螺栓断裂的故障,本文从部件结构装配、磨损宏观形貌、螺栓受力分析三个方面进行故障原因分析。旋转头频繁启停造成螺栓松动和微动损伤,卷筒与旋转头的相对运动使螺栓受到垂直于轴线的剪切力并在螺栓头杆连接处产生应力集中进而发生断裂。文章结合故障原因对旋转头结构进行了改进,通过提升旋转头与芯轴的联接强度及耐磨等性能,显著提高了卷筒运行的稳定性及使用寿命,保障了连退机组高速、稳定的生产节奏。Based on the fracture of the connecting bolt of the drum rotating head inproduction,this paper analyzes the fault causes from three aspects:component structure assembly,wear macro morphology and bolt stress analysis.The frequent start and stop of the rotating head causes bolt loosening and fretting damage.The relative movement between the drum and the rotating head makes the bolt subject to shear force perpendicular to the axis,and whichproduces stress concentration at the connection of the bolt head and rod to result in fracture.In this paper,the structure of the rotating head is improved in combination with the fault causes.By improving the connection strength and wear resistance between the rotating head and the mandrel,the stability and service life of the drum are significantly improved,and it is the guarantee of realizing high-speed and stable production rhythm of the continuous withdrawal unit.

关 键 词：卷取机 卷筒 旋转头 螺栓 

分 类 号：TG333.24[金属学及工艺—金属压力加工]