粗轧R6压下自动标定

介绍了热轧板厂粗轧Ｒ６压下自动标定的步骤、调试过程、故障诊断以及在调试过程中对发现问题的进一步改造，使得Ｒ６压下自动标定功能正常投入。通过对Ｒ６压下进行自动标定，能较准确计算并设定Ｒ６辊缝，为精轧数学模型提供比较精确的粗轧出口厚度。     

粗轧R6压下自动标定

介绍了热轧板厂粗轧R6压下自动标定的步骤、调试过程、故障诊断以及在调试过程中对发现问题的进一步改造,使得R6压下自动标定功能正常投入。通过对R6压下进行自动标定,能较准确计算并设定R6辊缝,为精轧数学模型提供比较精确的粗轧出口厚度。     

本钢粗轧机压下系统改造

介绍利用CP80－A800中的剩余内存对粗轧压下系统进行改造的思路及办法。     

本钢粗轧机压下系统改造

介绍利用ＣＰ８０－Ａ８００中的剩余内存地粗轧压下系统进行改造的思路及办法。     

周期轧管机的自动压下控制

本文介绍了由压下电动机、变频器、PLC和绝对值编码器构成的周期轧管机的压下自动控制系统。作者简介了压下工艺和设备；着重描述了该压下控制系统的硬件配置和应用程序设计。生产实践表明，该控制系统实现了对周期轧管机压下装置高效、准确的控制。     

VB(Visual Basic)在中厚板压下规程中的应用

压下规程是中板厂计划、组织、实施生产的依据,因此,如何制定和优化压下规程是厂家们一直关心的问题.文章利用可视化编程语言VB来制定压下规程,具有人工分配压下规程和自动分配压下规程两个功能,利用VB具有的良好人机交互性,使得该压下规程在实际应用中既考虑原则性又具有灵活性.     

VB（Visual Basic）在中厚板压下规程中的应用

压下规程是中板厂计划、组织、实施生产的依据，因此，如可制定和优化压下规程是厂家们一直关心的问题。文章利用可视化编程语言VB来制定压下规程，具有人工分配压下规程和自动分配压下规程两个功能，利用VB具有的良好人机交互性，使得该压下规程在实际应用中既考虑原则性又具有灵活性。     

冷轧过程控制压下分配计算模型研究

合理地分配各个机架的压下负荷是冷轧过程控制中重要的组成部分,也是其它设定值的基础。在压下分配原理的基础上分析了压下分配的数学模型,根据现场实际生产对压下分配计算方法进行了设计,并应用到了现场。实际生产中表明,应用新的压下计算方法使产品的质量得到很大提高。     

周期式轧管机的轧辊压下自动控制

施耐德ATV71变频器具有参数设置简便、功能完善等特点。使用施耐德ATV71变频器、西门子S7-300PLC的SM338绝对值位置输入模块和图尔克绝对值编码器一起构成轧辊压下半闭环控制系统,实现了对周期轧管机轧辊压下丝杆进给量高效、准确的控制。     

重钢4100mm宽厚板精轧机压下控制系统

本文介绍了应用在中厚板轧机压下装置上的电气及液压自动控制系统。其中电动压下可实现自动位置控制（APC）,采用两台西门子6SE70整流回馈装置的逆变器组成主从控制系统,主装置采用速度控制方式,从装置则接受主系统发出的转矩设定指令而工作在转矩调节方式;液压压下使用自动辊缝控制（AGC）系统,实现厚度、位置及压力的自动控制,其主控制器为西门子的TDC。     

唐山不锈钢1580mm热轧助卷辊AJC控制功能

自动踏步控制(Auto Jump Control,AJC)功能是热轧卷取控制最为重要功能之一,对于成品钢卷的产品质量具有非常重要的影响。结合设计和编程思路,以及工程实践,深入介绍了AJC功能的位置和压力控制原理以及相应辊缝、夹紧力的转换计算方法,并对AJC功能实施效果的2个关键因素-助卷辊跳跃量设定和AJC踏步时序控制进行了说明。此功能在唐山不锈钢1580 mm热轧卷取机上得到了很好的应用,控制效果明显。     

1700mm热轧板形控制优化

针对1 700 mm热轧生产线投产以来存在的问题,通过数学模型和工艺参数的分析研究,结合大量生产实际,通过对工作辊轴向移动可获得辊缝正负凸度的变化,从而降低目标凸度;通过增大PC角提高平直度;修正比例因子值,从而提高了AGC控制精度;合理分配精轧机负荷,保证精轧出口的平直度。经过这4方面的综合优化,改善了板形控制功能,使1 700 mm轧机热轧带钢的浪高基本控制在10 mm以下,板形得到有效优化。     

热连轧机厚度设定与控制系统分析

本文介绍１７００ｍｍ热连轧机一种厚度、轧制压力的预设定方法和厚度控制系统。通过对该系统分析，证明系统与动态设定型一致，同时具有自己的特点．这对设计和改造热连轧机控制具有实际意义．     

Development of hybrid evolutionary algorithms for production scheduling of hot strip mill

A hot strip mill (HSM) produces hot rolled products from steel slabs, and is one of the most important production lines in a steel plant. The aim of HSM scheduling is to construct a rolling sequence that optimizes a set of given criteria under constraints. Due to the complexity in modeling the production process and optimizing the rolling sequence, the HSM scheduling is a challenging task for hot rolling production schedulers. This paper first introduces the HSM production process and requirements, and then reviews previous research on the modeling and optimization of the HSM scheduling problem. According to the practical requirements of hot rolling production, a mathematical model is formulated to describe two important scheduling sub-tasks: (1) selecting a subset of manufacturing orders and (2) generating an optimal rolling sequence from the selected manufacturing orders. Further, hybrid evolutionary algorithms with integration of genetic algorithm (GA) and extremal optimization (EO) are proposed to solve the HSM scheduling problem. Computational results on industrial data show that the proposed HSM scheduling solution can be applied in practice to provide satisfactory performance.     

板带轧制规程最优化方法

本工作完善、开发了一种规程优化的新方法--等式目标函数规程最优化方法.计算了 五机架1700冷连轧机组的产量最高、设备充分利用以及板形良好的最优规程.证实了本方法 的突出优点是计算方法简单、运算速度快、适应性强;可以作为过程计算机在线规程优化计算 的数学模型.     

Shear localization sensitivity analysis for Johnson–Cook constitutive parameters on serrated chips in high speed machining of Ti6Al4V

This research aims to investigate the influence of material constitutive parameters on the serrated chip formation during high speed machining (HSM) of Ti6Al4V alloys with finite element simulations and cutting experiments. The Johnson–Cook (JC) constitutive model and JC fracture model with an energy-based ductile failure criterion are adopted to simulate the HSM process. Five JC constitutive model parameters such as initial yield stress, hardening modulus, strain hardening coefficient, strain rate dependency coefficient, and thermal softening coefficient are included in this research. Shear localization sensitivity is novelly proposed to describe variations of serrated chips under different JC constitutive model parameters. Shear localization sensitivity is subdivided into chip serration sensitivity and chip bending sensitivity. The research finds that the influences of initial yield stress and thermal softening coefficient parameters on the chip serration and bending are much more prominent than those of the rest three JC constitutive model parameters. With initial yield stress or hardening modulus in JC constitutive model increasing, the chip serration sensitivity increases and the chip bending sensitivity decreases. However, the influences of the rest three parameters on chip serration sensitivity are opposite. High speed orthogonal cutting experiments of Ti6Al4V are carried out to validate the simulation results under different cutting speeds ranging from 50 m/min to 3000 m/min and fixed uncut chip thickness with 0.1 mm. The results show that the serrated degree of chips increases with the cutting speed increasing until the chips become completely fragmented. The cutting speed break point of chip morphology from serrated to fragmented ones for Ti6Al4V is about 2500 m/min. The average cutting force decreases with the cutting speed increasing, which is a prominent advantage for HSM. This paper can help to get deeper insights into the serrated chip formation mechanism in HSM.     

复杂多曲面高速铣3轴精加工刀轨优化算法

针对高速铣削的特点和现实要求,提出了适合高速铣削面向复杂曲面的3轴精加工可变行距的螺旋线与Zigzag混合刀轨优化算法．该算法生成的刀轨光顺简洁,满足了高速加工的要求．算法中采用的行间NURBS过渡边优化法和跨区域刀轨优化法,具有合理性和实用性．加工结果表明,加工表面无过切．经测试,算法稳定可靠．     

A new solid model HSM and its application to interference detection between moving objects

In order to realize collision-free coordination of multiple robots, it is crucial to model the robots in a computer adequately and to detect existence or nonexistence of an interference between them on the basis of data structure of the robot models. Motivated by this observation, this article proposes a new solid model named “Hierarchical Sphere Model” (HSM) for modeling moving objects (robots) and presents a feasible algorithm for checking an interference between them on the basis of HSM. HSM arranges region informations in a hierarchical tree structure whose nodes correspond to spherical regions. On the basis of hierarchy of HSM, the algorithm checks only intersections between HSMs' nodes which are close to each other, and hence it works efficiently even if the objects have complicated shape. Furthermore, because a node of HSM represents a spherical region, intersection between, two nodes can be easily found just by calculating the distance between two spheres corresponding to them no matter how the objects move. Finally, the efficiency of the algorithm is demonstrated by several experiments.     

The Impact of High Speed Machining on Computing and Automation

Machine tool technologies, especially Computer Numerical Control (CNC) High Speed Machining (HSM) have emerged as effective mechanisms for Rapid Tooling and Manufacturing applications. These new technologies are attractive for competitive manufacturing because of their technical advantages, i.e. a significant reduction in lead-time, high product accuracy, and good surface finish. However, HSM not only stimulates advancements in cutting tools and materials, it also demands increasingly sophisticated CAD/CAM software, and powerful CNC controllers that require more support technologies. This paper explores the computational requirement and impact of HSM on CNC controller, wear detection, look ahead programming, simulation, and tool management.     

基于特征融合的手形匹配算法

手形识别是生物特征识别的重要组成部分,手形匹配是手形识别的关键。目前常用的方法有特征矢量法（CVM）和点匹配方法（PPM）两种,这两种方法在对手形进行匹配时各有优点,也有局限性。提出一种多特征融合的手形识别算法,使得两者能够有效的结合起来,提高了手形匹配的准确性和鲁棒性。