二辊周期式冷轧管机孔型与轧制力电算程序设计

介绍了用电算方法进行二辊周期式冷轧管机孔型设计的基本原则，编制了孔型设计和轧制力电算程序，给出了电算实例。该电算程序具有运算速度快、结果准确等优点，适合于冷轧钢管和有色金属管材生产。     

中厚板轧机工况在线监测系统的探讨

分析了中厚板轧机工况在线监测系统的必要性和实用性，同时对中厚板轧机工况在线监测系统的功能，构成，硬件和软件配置及应用前景作了详细的阐述。     

大型轧钢机机架热处理工艺研究

介绍了安阳 2 80 0 mm和宝钢 1 42 0 m m轧钢机低碳钢机架的热处理生产过程 ,对其热处理工艺及所得结果进行了分析 ,从而得出更适合于大型轧钢机机架热处理的工艺     

商用车膜式空气弹簧及其特性分析

膜式空气弹簧已在商用车上得到了广泛应用。介绍了膜式空气弹簧的结构及空气弹簧的基本理论，分析了影响膜式空气弹簧特性的主要因素，表明膜式空气弹簧可满足理想的弹簧特性和商用车的特殊用途。     

基于应变的柴油机滚动轴承故障诊断方法研究

从简单的悬臂梁入手,建立了柴油机上滚动轴承的动力学模型,从理论上推导了梁上各点位移、速度、加速度和应变的响应解析表达式。通过仿真计算,发现上述四种参数对激振力都很敏感,而相对于其它三种响应而言,应变响应对其它激振源的加速度信号不敏感,得出了利用应变信号可以有效地避免柴油机上其它振动源的干扰的结论。并通过试验研究,验证了上述结论。     

基于ISO 14728-2标准滚动直线导轨副额定静载荷分析

介绍了ISO14728-2标准关于滚动直线导轨副的额定静载荷的计算方法，并在此基础上进行了分析讨论，提出了在额定静载荷计算过程中应该注意的问题。通过ISO14728标准与原有的相关理论研究成果进行分析比较，证明基于Herz弹性接触理论及Palmgren理论对滚动直线导轨副的额定静载荷的定义和计算方法是适用的。     

Web guide process in cold rolling mill :Modeling and PID controller

There are many intermediate web guides in cold rolling mills process such as CRM (cold rolling mill), CGL (continuous galvanizing line), EGL (electrical galvanizing line) and so on. The main functions of the web guides are to adjust the center line of the web (strip) to the center line of the steel process. So they are called CPC (center position control). Rapid process speed cause large deviation between the center position of the strip and the process line. Too much deviation is not desirable. So the difference between the center position of the strip and the process line should be compensated. In general, the center position control of the web is obtained by the hydraulic driver and electrical controller. In this paper, we propose modelling and several controller designs for web-guide systems. We model the web and guide by using geometrical relations of the guide ignored the mass and stiffness of the web. To control the systems, we propose PID controllers with their gains tuned by the Ziegler-Nichols method, the H∞ controller model-matching method, and the coefficient diagram method (CDM). CDM is modified for high order systems. The results are verified by computer simulations.     

滚动轴承数据库设计及其在故障诊断中的应用

针对国内外滚动轴承种类繁多、编号复杂以及轴承故障特征频率难以获得的现状,利用Power Builder强大的数据库功能,设计出一套数据完整、查询快捷方便,并与瑞典SKF公司的轴承故障特征频率参数相吻合的数据库系统,同时举例说明该系统可广泛应用于设备状态监测、故障诊断和预知维修领域。     

关于滚动轴承选型设计问题的研究

介绍了滚动轴承选型设计方法的发展，提出了根据滚动轴承系统可靠性与寿命要求和实际工况来完成组成系统各单元滚动轴承的选型设计的方法，使所选择的滚动轴承组成的系统在使用中满足系统的设计要求。     

The transition between fully flooded and starved regimes in EHL

Lubricant starvation of the contact can occur in high-speed oil or grease lubricated bearings resulting in reduced elastohydrodynamic (EHL) film thickness (Lubricat. Sci. 11 (1999) 227). To achieve optimum bearing performance and component life, it is obviously desirable to be able to predict when starvation will occur and the resulting level of surface protection. For both oils and greases, the transition between fully flooded and starved behaviour is determined by lubricant loss and replenishment of the track (ASME Trans. J. Tribol. 120 (1998) 126; Cann PME, Chevalier F, Lubrecht AA. Track depletion and replenishment in a grease lubricated point contact: a quantitative analysis. Proceedings of the 23rd Leeds–Lyon Symposium on Tribology. 1996. p. 405–14). The current paper develops a criterion for the fully flooded and starved transition of an oil-lubricated contact based on four primary factors controlling lubrication level; these are volume of oil, contact dimensions, oil viscosity and speed. Experiments have been carried out using an optical EHL device to investigate the effect of each of these parameters on starvation. The results show how the boundary between the fully flooded and the starved regime and the film thickness in the starved regime depend on these parameters. A single dimensionless parameter (SD), based on replenishment local to the contact, has been established between the operating parameters and the transition from the fully flooded to starved regime.In this paper, the starvation criterion has been developed for an oil-lubricated contact with a fixed volume of oil present. The next stage is to extend the analysis to grease and the prediction of lubrication failure in bearings.