四辊可逆式轧机采用偏心轧制的实践

分析了马钢中板厂四辊可逆式中板轧机辊系的受力情况 ,并结合生产实际计算出偏移量 ,此外进行了在有偏移量及无偏移量情况下力能参数的对比分析。结果表明 :当偏心距e=10mm时 ,轧辊轴承座受到的水平分力与其偏移方向始终保持相同 ,水平分力增大且方向固定不变 ,使辊系处于稳定状态。     

四辊可逆式轧机采用偏心轧制的实践

分析了马钢中板厂四辊可逆式中板轧机辊系的受力情况,并结合生产实际计算出偏移量,此外进行了在有偏移量及无偏移量情况下力能参数的对比分析。结果表明：当偏心距ｅ＝１０ｍｍ时,轧辊轴承座受到的水平分力与其偏移方向始终保持相同,水平分力增大且方向固定不变,使辊系处于稳定状态。     

万向接轴叉头强度分析

本文对某初轧机万向接轴中的轧辊端叉头进行了应力分析。描述了轧辊端叉头在轧机正常工作时的应力分布规律，对叉头的断裂原因进行了分析。     

万向接轴叉头强度分析

本文对某初轧机万向接轴中的轧辊端叉头进行了应力分析。描述了轧辊端叉头在轧机正常工作时的应力分布规律。对叉头的断裂原因进行了分析。     

轧机两侧刚度差异对热轧宽厚板两侧厚度偏差的影响

针对轧机两侧刚度差异引起的宽厚板两侧厚度偏差,采用力平衡和力矩平衡原理,分析轧辊承受载荷的分布情况,研究宽厚板两侧厚度偏差与轧辊长度、板宽、轧制力和轧机两侧刚度差异之间的规律.得到在不同轧辊长度、板宽和轧制力的条件下,轧机两侧刚度差异对宽厚板两侧厚度偏差的影响,同时分析了轧机两侧刚度差异不变的条件下,板宽对宽厚板两侧厚度偏差的影响.     

一种高精度板带轧机的设想

轧辊和轧机的弹性变形是影响板带轧制时工作辊缝和平直度及厚度精度的关键因素;轧辊两端设置压下螺丝是产生轧辊弹性弯曲的根源。本文在理论分析的基础上提出了将压下螺丝从轧辊两端移至辊身中部的高刚度。高精度板带轧机的设想,并对其主要特点进行了探讨。     

中板轧机AGC系统头尾补偿功能分析

AGC系统在中板轧机应用使钢板纵向厚差得到显著提高,钢板的出口厚度与很多因素有关,如:来料的厚度、温度、压下响应速度和轧机刚度等。由于钢板头尾形状的不规则和边缘的性质,导致钢板边部温度的不确定性,使得头尾厚度偏差较大。本文结合现场应用情况,对某2500中板轧机AGC进行消化和分析,对影响钢板头尾厚度的因素进行研究,制定改进方案,取得良好的效果。     

1720冷轧机设备特点的分析

1720冷轧机采用三菱-日立公司的六辊冷轧机技术和关键设备.该轧机采用轧辊窜动、正负弯辊以及轧辊的多段冷却进行板型的控制,采用CARROUSEL(双卷筒)式卷取机.本文介绍该轧机的设备概况,对设备结构进行分析.     

一种高精度板带轧机的设想

轧辊和轧机的弹性变形是影响板带轧制时工作辊缝和平直度及厚度精度的关键因素;轧辊两端设置压下螺丝是产生思辊弹性弯曲的根源,本文在理论分析的基础上提出了将压下螺丝从轧辊两端移至辊身中部的高刚度,高精度板带轧机的设想,并对其主要特点进行了探讨,。     

意大利连轧机轧国产化的研制辊

通过对意大利连轧机轧制原理及其轧辊工作状况的分析,在大量试验基础上,成功地对轧辊进行了国产化研制．严格选定材料,并根据不同序号的轧辊分别采用了不同的工艺方法,经过反复实践,轧辊无论是在耐磨性、表面质量、孔型精度、使用寿命等方面,都超过了进口轧辊,为工厂引进设备的消化吸收,创造了良好的经济效益．     

Simulation of type selection for 6-high cold tandem mill based on shape control ability

A theoretical method for selecting strip rolling mill type that considered shape control ability was established using the figure alteration range that was worked by the alteration track of vector expressing strip＇s cross section （crown） to express the shape control ability of rolling mill. With the mathematical models and simulation software that were developed by the authors＇ own models, four types of mills were aimed, including HCM （6-high middle rolls shift type HC （high crown） -mill）, HCMW （6-high middle rolls and work rolls shift type HC-mill）, UCM （6-high middle rolls shift type HC-mill with middle roll bender） and UCMW （6-high middle rolls and work rolls shift type HC-mill with middle roll bender）, and the shape and crown control ability of every mill type was analyzed and compared. An appropriate arrangement mode of tandem mill was brought forward. The results show that UCMW mill is a perfect choice for controlling shape and crown, and the area of control characteristics curve of UCMW （or UCM） is twice than that of HCM, but UCM mill is also a good choice for its simple frame. In other word, the shape and crown controlling ability of UCMW mill is better than that of UCM mill, but the frame of UCM mill is simpler than that of UCMW mill. As for the final type of mill, should be synthetically decided by thinking over fund and equipment technology.     

PC轧机辊系的三维建模与有限元分析

采用三维有限元法(ANSYS)建立PC轧机辊系的模型,并分析了PC轧机在不同工况下辊系弹性变形与工作辊/支撑辊的接触压力.计算结果表明,影响PC轧机轧件截面形状的主要因素是对辊交叉所产生的等效辊凸度.文中采用的建模与分析方法与其它方法相比,计算结果更为精确、可靠.     

UC轧机中间辊非对称弯辊改善辊间压力分布

为了改善UC轧机辊间压力不均匀分布问题,采用中间辊非对称弯辊系统替代原有对称弯辊系统.应用影响函数法计算辊系变形,同时考虑辊缝中金属横向流动对带钢出口张力横向分布的影响,通过迭代方法计算出中间辊两端施加不同弯辊力后的辊间压力分布、出口厚度横向分布与出口张力横向分布.理论分析和实际应用结果表明,中间辊非对称弯辊可以改善辊间压力分布不均,降低轧辊磨损和减少轧辊辊面剥落,且不会影响成品带钢的厚度和板形.     

四辊轧机接触压力计算的有限元方法及最小磨辊量的确定

采用有限元方法研究在任意工况下四辊轧机工作辊／支承辊间接触压力沿横向分布的计算原理,并对冷轧工作辊最小磨辊量进行定量分析．与其它方法相比本方法具有应用方便、精度高的特点,可适用于不同的轧制工况．     

热轧带钢轧机工作辊热应力的有限元分析

热轧带钢轧机工作辊在工作过程中承受交变热应力,掌握变化的热应力的大小和规律非常重要.热应力的大小目前无法使用实验的方法得到,而采用数值模拟求解是一种行之有效的方法.采用ANSYS 8.0软件对热轧带钢轧机工作辊的温度场和热应力进行了有限元分析,通过计算分析得出工作辊温度场的分布规律,这对于工作辊寿命分析、设计及现场使用都有参考价值.     

Forced transverse vibration of rolls for four-high rolling mill

In order to investigate the forced transverse vibration of rolls under distributed draught pressure and moment of bending roll force, the forced transverse vibration model of rolls for four-high rolling mill was established. The work roll and backup roll were considered as elastic continuous bodies that were joined by a Winkler elastic layer. According to Euler-Bernoulli beam theory, the forced transverse vibration of rolls was analyzed based on modal superposition method. The forced vibration equations were established when the draught pressure and moment of bending roll force were imposed on the rolls respectively. Numerical modeling was made on 2 030 mm cold tandem rolling mill of Baoshan Iron and Steel Company. Simulation results show that when the work roll is only subjected to different forms of draught pressures, the vibration curves of work roll and backup roll are quadratic curves with amplitudes of 0.3 mm and 45 μm, respectively. When only the moments of bending roll force are imposed on the work roll and backup roll, the vibration curves of work roll and backup roll are quadratic curves, and the amplitudes are 5.0 and 1.6 μm, respectively. The influence of moment of bending roll force on the vibration of work roll is related with the bending roll force.     

二辊轧机轧辊轴向调整装置的结构探讨

二辊轧机是中小型轧钢生产中一种主要的轧制设备，其轧辊装配及轴向调整装置直接影响轧辊孔型定位及轴向刚度，是保证产品质量的重要组成部分。本文对此进行了分析探讨。     

板凸度预报的一种应用

介绍了武汉钢铁(集团)有限公司中板厂应用的一套板凸度优化预报程序,该程序运行在ALPHA-4000上.在充分考虑轧辊初始凸度、磨损、热膨胀及受力变形等诸多因素的情况下,通过改变工作辊的初始辊形和以优化板凸度为目标的压下分配,实现了板凸度的控制,并在优化预报的基础上,进一步实现了轧制规程的优化.     

Improvement on strip flatness of cold temper mills by modifying roll contour shape

A study on roll gap profile (strip profile) control was accomplished in a 1700 mm single-stand temper mill. Some critical problems such as the deviation of work roll contour caused by grinding and wear, the effectiveness of work roll bending were discussed. Using a finite element model, the effects of roll contours (ground and wear) on strip profile were investigated. The roll bending effect on strip thickness was also analyzed. It is pointed out that there are some special features of flatness control in the temper mill: during temper rolling, roll deformation is slight due to small rolling load, and the loaded roll gap profile mainly depends on work roll contour, while the backup roll has a little effect on gap crown; the effect of bending force on gauge can not be ignored due to the coupling between flatness control and gauge control. A new roll contour arrangement adaptable to the mill was presented and has been put into practical production. The application of the new set of rolls showed some good results: larger crown control range of work roll bender, higher rolling stability, better strip profile and flatness quality.     

滚动轴承滚动体板单元模拟的边界元法

在三维弹性接触边界元法基础上,采用不同形状板单元描述中间滚动体,并置于内环上,从而将多物体接触问题简化成两物体接触问题。对于板单元的弹性变形,用Hertz接触公式,将其变形以等效间隙代入总体矩阵方程中,从而获得轧机滚动轴承负荷特性的三维分布。本方法具有计算模型直观,简单和较高的计算精度,因而成为设计和分析轧机滚动轴承负荷特性的有效数值方法。