摘要
定宽机不同模块(倒角模块、孔型模块)与不同类型板坯(倒角坯、直角坯)配合使用的情况下,板坯的位移场、等效应力应变场会有所不同,导致热轧带钢边部缺陷发生率及带钢缺陷距边部距离存在差异而使边部切损不同,进而影响企业经济效益。采用DEFORM平台建立了定宽机减宽过程的有限元模型,并进行了仿真计算,分析了不同工况下板坯的侧压力,位移场以及等效应力应变场,从而对定宽机两种模块与板坯类型的匹配程度进行了研究。结果表明:与直角坯相比,倒角坯在过定宽轧制时其最大侧压力更小,“狗骨”厚度更小,应力分布更均匀,与倒角模块匹配效果更好;与孔型模块相比,倒角模块侧压下的板坯最大侧压力更小,“狗骨”厚度更小,应力分布更均匀,与板坯的匹配效果更好。同时,生产实践亦表明:倒角模块与倒角坯的组合可以降低带钢边部缺陷发生率,改善带钢边部质量,减少切损,从而提高企业经济效益。
Under the condition of using different modules(chamfer module,groove module)of the width reduction machine in combination with different types of slabs(chamfered slab,right-angle slab),the displacement fields and equivalent stress-strain fields of the slabs are different.This leads to differences in the occurrence rate of edge defects and their distance from the edge of the hot-rolled strip,resulting in varied edge trimming losses and consequently affecting enterprise economic benefits.A finite element model for the width reduction process of the width reduction machine was established using the DEFORM platform,and simulation calculations were performed to analyze the side pressure,displacement field,and equivalent stress-strain field of the slabs under different working conditions.This study thus investigates the matching degree between the two modules of the width reduction machine and the slab types.The results show that,compared with the right-angle slab,the chamfered slab exhibits smaller maximum side pressure,thinner"dog-bone"thickness,and more uniform stress distribution during width reduction,indicating a better match with the chamfer module.Additionally,compared with the groove module,the slab under the side pressure of the chamfer module demonstrates smaller maximum side pressure,thinner"dog-bone"thickness,and more uniform stress distribution,achieving a better matching effect with the slab.Meanwhile,production practice confirms that the combination of the chamfer module and the chamfered slab reduces the occurrence rate of edge defects in strip and improves its edge quality,thereby enhancing enterprise economic benefits.
作者
霍光帆
陆启明
周娜
武巧玲
焦晋沙
陈兵
HUO Guangfan;LU Qiming;ZHOU Na;WU Qiaoling;JIAO Jinsha;CHEN Bing(Beijing Shougang Co.,Ltd.,Qianan 064400,China;School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《轧钢》
北大核心
2025年第6期170-179,共10页
Steel Rolling
关键词
定宽机
孔型模块
倒角模块
直角坯
倒角坯
变形均匀性
匹配性
边部缺陷
width reduction machine
groove module
chamfer module
right-angle slab
chamfered slab
deformation uniformity
matching property
edge defects
