基于有限元仿真的中厚板辊式矫直板形分析  

Analysis of medium and heavy plate shape in roll straightening based on finite element simulation

作　　者：王国庆 李家栋[1] 韩冰 李勇[1] WANG Guoqing;LI Jiadong;HAN Bing;LI Yong(State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819

出　　处：《轧钢》2024年第5期188-194,共7页Steel Rolling

基　　金：国家自然科学基金面上项目(52274380)。

摘　　要：作为精整工序的关键环节,矫直工艺在中厚板板形质量控制方面起着不可忽视的作用。合理的矫直工序一般通过压下量与弯辊量的设定来实现对板材的矫正作用。经过现场考察得知,矫直生产中板材主要存在一维的弯曲缺陷和二维的浪形缺陷。借助ANSYS/APDL模块用命令流建立了三维动态矫直过程有限元模型,模拟研究了不同矫直方法对矫直板材平直度和板形的影响。研究结果表明:当板材存在一维弯曲缺陷时,矫直机入、出口压下量起到关键作用,通过调整压下量能使矫后板材的残余应力最小,明显地改善板材的平直度,达到预期矫直效果;当板材存在二维浪形缺陷时,由于板材不同部位纵向延伸不均匀,为达到矫直目的则需要压下量和弯辊量共同作用,均匀变形延伸。此外,在仿真分析的基础上,利用某公司宽厚板厂生产现场的矫直设备进行了相关试验,试验数据表明,仿真结论和试验结果相吻合,为不同板形缺陷板材的矫直方法提供了依据,对实际生产有一定的指导意义。As a key part of the finishing process,the straightening process plays a non-negligible role in the quality control of medium and heavy plate shapes.The reasonable straightening process generally realizes the correction effect of the plate by setting the amount of reduction and the amount of bending roll.After on-site investigation,it was found that there were mainly one-dimensional bending defects and two-dimensional wave defects in straightening production.With the help of the ANSYS/APDL module,a three-dimensional finite element model of the dynamic straightening process was established with command flow,and the effects of different straightening methods on the flatness and shape of the straightened plate were simulated and studied.The results show that when the plate has a one-dimensional bending defect,the inlet and outlet reduction amount play a key role,and the residual stress of the straightened plate can be minimized by adjusting the reduction amount,which can significantly improve the flatness of the plate and achieve the expected straightening effect.When the plate has two-dimensional wave defects,due to the uneven longitudinal extension of different parts of the plate,in order to achieve the purpose of straightening,it is necessary to act together with the reduction amount and the amount of bending roll to evenly deform and extend.In addition,on the basis of simulation analysis,the relevant tests were carried out by using the straightening equipment at the production site of a company's wide and heavy plate factory,and the test data showed that the simulation conclusions were consistent with the test results,which provided a basis for the straightening methods of plates with different plate shape defects,and had certain guiding significance for actual production.

关 键 词：中厚板 辊式矫直 有限元仿真 板形缺陷 不平度 

分 类 号：TG335[金属学及工艺—金属压力加工] TB115[理学—数学]