The results show that the bottom area of the steel rail is rolled severely during rolling process , and thus resulted in the local plastic deformation , hardening and concentration of inclusions in the bottom area , leading to the premature fracture of the steel rail 分析认为：钢轨在轧制过程中轨道底部区域收到严重碾压，产生了局部塑性变形和硬化，局部区域夹杂物集中，导致钢轨断裂。
The effect of rolling coefficients was analyzed , and the optimal coefficients were gotten , therefore the continual coiled green strips in a certain thickness could be produced which have a good mechanical property 分析了粉末轧制过程中的各个参数的影响，利用设计得到供料漏斗和卷带装置，通过实验得到了一组能够将复合粉末制备成为具有良好机械性能的粉末带材的轧制参数，并连续生产得到一定厚度的粉末带卷。
Based on shanghai bao steel co . practical project , which is establishing modek simulating of dynamic roll procedure and control optimizing for cold continuing roll mill , the paper finished the speed system of it and research on speed control system from theory 本课题结合上海宝山钢铁公司“冷连轧机轧制过程动态仿真及控制优化”项目，完成冷带轧机速度控制系统的建模、仿真实际课题，并对速度控制进行理论研究。
In this thesis , according to changeable quantity , nonlinear and time - varying of the copperplate rolling process , the simple fuzzy controller was first designed based on the analysis of the fuzzy control theory , which is the basis of other high - level controllers 本文针对铜板轧制过程具有多变量、非线性、时变性的特点,在分析了模糊控制基本理论的基础上,首先设计了铜板轧制简单模糊控制器,这也是进一步设计其它高性能模糊控制器的基础。
The configuration of conventional backup and work rolls for revamped 1700 tandem cold rolling mill at wisco was proved unreasonable by systematical test as the cause of work roll edges contact during thin strip rolling and unsatisfactory flatness of product 摘要通过现场跟踪测试和生产实践发现武钢1700冷连轧机组“酸轧联机”改造工程中存在常规凸度辊形配置方案不合理，由此引起了薄规格轧制的工作辊“压肩”现象和轧制过程欠稳定导致成品板形质量欠佳等问题。
Hydraulic servo system used in coiler is mainly to realize the step - by - step control . by using the servo system , vibration and striking are largely decreased , the accidents are reduced , and the level of automation is largely improved , as well as the quality of production 电液伺服系统在现代的热轧卷取机中的应用主要是实现带头的自动步进回避，这样就有效地消除冲击，同时也使卷取过程中各种事故大为减少，大大提高了轧制过程的自动化水平，产品产量和质量。
And relying on this , our laboratory proposes a new cladding method . by means of large dynamic explicit fem code ansys / ls - dyna , the numerical simulation was carried out in bimetal forming process . during the simulation of the forming process , the large deformation of the strip should be considered , as well as geometrical and material nonlinear , the contact between the roller and the strip , the contact between two metal sheets and the load . as for these problems , we can use node to surface contact and relative parameters , biso model is introduced , the load is applied as array 本文采用ansys / ls - dyna计算程序为分析工具，对锯齿形双金属复合板成型过程进行计算机数值模拟，在对轧制过程模拟时，针对轧件变形的几何非线性和材料非线性特点、轧辊与轧件间的接触、轧件间的接触以及模型的加载等问题，给出了在ansys / ls - dyna中相应的解决方法：应用nodetosurface接触方式，设定相应参数，选用双线性等向硬化模型，载荷作为array施加在刚体质心。
With prestressed rolling mill of the middle steelworks of taiyuan iron and steel limited group company as the researched object , this article analyze the existent questions and research the initial stress of prestressed rolling mill and computer control system , analyze the design thought of prestressed rolling mill and clarify the relationship between the dimensional precision of rolled material and the rigidity of base of rolling mill and the main method to increase the rigidity of base of rolling mill , analyze how to confirm the rigidity , sectional area of handle and post , and pretightening force , put forward the viewpoint that the key to assure great rigidity is to assure that the remnant initial stress is always positive during rolling , and develop intelligent control system with plc as the core on the basis of the former research to assure that the remnant initial stress is always positive during rolling 本文以太钢集团公司中型型钢厂预应力轧机为对象，分析了该厂预应力轧机所存在的问题，对预应力轧机的预应力以及微机控制进行了系统研究；分析了预应力轧机的设计思路，阐明了轧材尺寸精度与轧机机座刚度的关系及提高轧机机座刚度的主要途径；分析了预应力轧机设计过程中预应力轧机的刚度、预紧拉杆和机架立柱断面积及预紧力的确定；提出了预应力轧机保证高刚度的关键就是“确保轧制过程中，残余预应力始终大于零”的观点；在前述研究的基础上开发了以可编程逻辑控制器为核心的智能监控系统，以确保“轧制过程中，残余预应力始终大于零”这个要求。
Firstly , the distortion of rolled piece and the designing method in the beforehand slit pass and slit pass has been analyzed . secondly , based on the research production of predecessor and research of the author , card system selected some corresponding experience formulas such as roll force , roll moment , roll temperature and roll consume , and established spread model in the beforehand slit pass and slit pass and the distribution model of elongation coefficient . subsequently , card system applied the dynamic programming method with minimum roll consume and optimized its pass system 本文以圆钢双线切分为基本实体模型，着重分析了预切分孔型和切分孔型在轧制过程中的变形特点及相应的孔型设计方法；基于前人的研究成果及作者的探索，选择了相应的轧制力、轧制力矩、温度及能耗模型，建立了预切分和切分的宽展及延伸系数的分配模型；应用动态规划法以能耗最小为目标函数对孔型系统进行了优化设计；利用visualbasic6 . 0和microsoftaccess数据库的连接，建立了数据查询系统，以visualbasic6 . 0和autocad之间的接口在vb环境下完成了断面孔型图的绘制。
For the aim of creating and improving the mathematic models in the rolling process , advance the academic level , and also for the ultimate quality and the shape control of the rod , this paper via the course of simulation of the rolling process , fetch out the distribution of the various variable during the rolling process , and do the general analyses to the result 对轧制过程进行模拟与仿真,求解轧制过程中的各种变量分布,并对得到的结果进行综合研究,建立及不断改进轧制过程的数学模型,提高理论解析精度,提高线材的形状控制水平和产品的最终质量。本论文针对武钢? ?高速线材厂活套控制系统进行研究。
