铜带螺旋铣刀的设计与使用

在铜带加工的铣面过程中,要求铣面后的铜板带厚度均匀、表面光滑,无毛刺、刀痕和划伤,而铣面产品的好坏在很大程度上取决于铣刀的质量.与普通的金属切削加工铣刀相比,由于铜带铣刀是安装在铣面机生产线上,一次性地连续切削大宽度的铜带(铜带宽度一般300～1300mm),因此铣刀的结构、参数、材料的选择和使用过程中的维护都有其特殊性,本文着重介绍铜带螺旋铣刀在设计和使用中应注意的一些问题.     

带的强迫共振与主参数共振实验研究

不考虑轴向运动,采用两端简支的模型以阶次跟踪方法实验研究铜带的强迫共振和主参数共振。从谱阵图中易发现强迫共振频率等于横向激励频率,主参数共振频率为铜带张力波动频率的1/2,并且两种共振振幅峰值频率均大于铜带的固有频率,这与理论分析相符,为后续研究工作提供了实验依据。     

精密铜带圆盘纵剪机

通过对精密铜带圆盘剪切机的工作原理和工艺过程进行研究，对引进的美国剪切机进行了技术改造，设计制作了新的装置，实现了软态铜带的剪切。     

高清净性铜带材冷轧润滑剂研究

通过对铜带材冷轧加工的摩擦学特性及润滑模型分析,开发了具有良好润滑性及Ebner光亮退火清洁性的润滑剂组合物,完全满足了铜带材四辊可逆冷轧机组的工艺润滑要求。     

H62接插件铜带的连续挤压短流程生产工艺

针对传统H62接插件铜带生产过程中工序诸多、成品率低、能耗高等问题,提出了连续挤压短流程生产工艺,并生产满足用户要求的产品,通过后继试验掌握了连续挤压生产H62接插件铜带过程中主轴转速、冷却速度、强化量等参数的配合规律,为推广应用该工艺奠定基础.     

四辊铜带轧机轧制过程计算机控制系统的研究

通过分析四辊铜带轧机轧制过程计算机控制系统的现状和设备组成,提出四辊铜带轧机轧制过程计算机两级控制系统,即L1级基础自动化级和L2级过程控制级,对轧制过程计算机两级控制的主要功能、硬件配置和软件编程进行设计,总结了轧制过程计算机控制系统的特点,为今后工程设计提供了参考。     

六辊铜带冷轧机组开卷机

介绍了800mm精密六辊CVC铜带冷轧机组开卷机的工艺流程、主要性能参数及设备结构特点等。     

增加再结晶退火前道次加工率对H68铜带冲制制耳的影响

铜带冲制制耳的产生对生产有许多不利影响,为解决此问题或使制耳率降低,文中通过对H68铜带的轧制工艺的改进使制耳现象得到了有效的控制.实验结果表明：使再结晶退火前道次加工率29.41%（0.85→0.6）增加至47.06%（0.85→0.45）,可以使制耳率从4.80%降低至1.12%.     

铝合金薄板冲小孔工艺及模具结构探讨

本文对机械闹钟夹板以铝合金薄板代替铜带之后的一次冲多个小孔的工艺及模具结构进行了分析、探讨。     

轧制变压器铜带边部处理技术

探讨了变压器铜带的技术性能及其边部修整要求。并详细描述了进行边部修整的方法和用于边部修整的设备。     

Control Scheme Using Forward Slip for a Multi-stand Hot Strip Rolling Mill

Forward slip is an important parameter often used in rolling-speed control models for tandem hot strip rolling mills. In a hot strip mill, on-line measurement of strip speed is inherently very difficult. Therefore, for the set-up of the finishing mill, a forward slip model is used to calculate the strip speed from roll circumferential velocity at each mill stand. Due to its complexity, most previous researches have used semi-empirical methods in determining values for the forward slip. Although these investigations may be useful in process design and control, they do not have a theoretical basis. In the present study, a better forward slip model has been developed, which provides for a better set-up and more precise control of the mill. Factors such as neutral point, friction coefficient, width spread, shape of deformation zone in the roll bite are incorporated into the model. Implementation of the new forward slip model for the control of a 7-stand hot strip tandem rolling mill shows significant improvement in roll speed set-up accuracy.     

Role of synthetic esters in the overall performance of cold rolling oil for steel

Cold rolling mill productivity and product quality depend on the lubricant chemistry and composition, as well as on such physical factors as operation and maintenance. This paper discusses new requirements for rolling mill oils. Ester-based rolling oil formulations have been developed and their performance is evaluated, notably in respect of lubricity, strip cleanliness, and emulsion stability. Changes in these properties during operation and storage are also considered. It is found that the properties are greatly influenced by chemical constitution and the fat-to-ester ratio.     

热轧宽带钢自由规程轧制中机型的配置

为了提高自由规程轧制中热连轧机的板形调节能力,提出了热轧宽带钢的机型配置方案。新机型的特点在于轧机的上游机架采用线性变凸度工作辊技术,下游机架使用锥形工作辊技术,全机组采用变接触轧制技术和强力弯辊。生产实绩表明,新机型配置方案使得宽带钢热连轧机板形控制性能大幅提高,能够适应自由规程轧制的需求。     

热轧带钢拍打装置设计及应用

热轧带钢中,常有钢卷卷取塔型的现象发生,严重影响生产效益。详细介绍分析了热轧带钢拍打装置的设计思路及各项参数。该装置能够有效的解决塔型现象,已在武钢热轧总厂中得到成功应用并申请专利。     

高速冷连轧机组的振动与对策研究

针对我国某钢厂高速冷连轧机组冷连轧机组轧制T5极薄带材时,第5机架轧制速度超过650 m/min出现轧机振动的问题,从生产现场该机组轧机振动的实测分析入手,确定了该轧机的振动源和振动频率,并采用有限元动态分析计算,验证了轧机振动实测分析结果和振动形态。根据实测分析和有限元计算所确定的振动轧机辊缝润滑油膜变化而引起轧机振动的结论,通过优化该轧机的轧制润滑工艺,有效抑制了该机组轧制T5极薄带材时出现轧机振动的现象,使该机组的轧制速度从650 m/min左右提高到900 m/min以上,消除了该机组轧制T5极薄带材的瓶颈问题。     

Study on the improved accuracy of strip profile using numerical formula model in continuous cold rolling with 6-high mill

The quality requirements for thickness accuracy in cold rolling continue to become more stringent. In cold rolling mill, it is very important that the rolling force calculation considers rolling conditions. The rolled strip thickness was predicted using calculated rolling force. However, the prediction of strip thickness in cold rolling is very difficult; in particular, for 6-high mill with shifted intermediate roll (IMR), the accuracy of thickness is not good. In this study, to improve the accuracy of rolled strip thickness, the roll gap flattening can be given based on Hertz contact theory, with contact between rolls and the smooth cylindrical rolls for the rolling elastic deformation. Also, the distribution of the roll gap flattening may be calculated using the contact force of unit transverse length. The strip profile at the continuous cold rolling is calculated by using the numerical analysis model considering the initial strip profile before cold rolling. Hence, we propose that the numerical model can predict the rolled strip profile more quickly and accurately and be applicable to the field. The results of the proposed numerical model were verified by FE-simulation and cold rolling experiments of 6-high mill with five stands.     

Coupled dynamic modeling of rolls model and metal model for four high mill based on strip crown control

The crown is a key quality index of strip and plate,the rolling mill system is a complex nonlinear system,the strip qualities are directly affected by the dynamic characteristics of the rolling mil.At present,the studies about the dynamic modeling of the rolling mill system mainly focus on the dynamic simulation for the strip thickness control system,the dynamic characteristics of the strip along the width direction and that of the rolls along axial direction are not considered.In order to study the dynamic changes of strip crown in the rolling process,the dynamic simulation model based on strip crown control is established.The work roll and backup roll are considered as elastic continuous bodies and the work roll and backup roll are joined by a Winkler elastic layer.The rolls are considered as double freely supported beams.The change rate of roll gap is taken into consideration in the metal deformation,based on the principle of dynamic conservation of material flow,the two dimensional dynamic model of metal is established.The model of metal deformation provides exciting force for the rolls dynamic model,and the rolls dynamic model and metal deformation model couple together.Then,based on the two models,the dynamic model of rolling mill system based on strip crown control is established.The Newmark-β method is used to solve the problem,and the dynamic changes of these parameters are obtained as follows:(1) The bending of work roll and backup roll changes with time;(2) The strip crown changes with time;(3) The distribution of rolling force changes with time.Take some cold tandem rolling mill as subject investigated,simulation results and the comparisons with experimental results show that the dynamic model built is rational and correct.The proposed research provides effective theory for optimization of device and technological parameters and development of new technology,plays an important role to improve the strip control precision and strip shape quality.     

热轧辊缝调整机构的布置形式比较

从热连轧机、中厚板可逆轧机以及宽厚板可逆轧机3种轧机类型出发,介绍热轧四辊轧机中参与辊缝调整的设备组成、布置形式及比较3种配置方式的优点和不足。     

20辊轧机轧件截面形状与边部减薄预报软件开发

利用接触元双坐标法（CEM）建立了双AS—U—Roll系统森吉米尔轧机轧制过程中轧件及辊系变形行为的CEM函数矩阵,并开发了SM4SM软件。该软件能够很好地预报各种轧制条件下轧件截面形状、轧件边部减薄、轧制力、轧辊挠曲等功能。文中应用SM4SM,分析了第一中间辊锥角、锥度长度和窜辊长度对轧件截面形状和轧件边部减薄控制的影响。研究结果对冷轧过程控制轧件板形和边部减薄具有重要的参考价值。