飞剪计算机速度控制系统

斯罗曼飞剪机是实现带钢定尺剪切的重要设备,其运行速度与带钢的长度和厚度有关。本文介绍了它的速度模型软件实现方法和硬件构成原理。     

棒材倍尺飞剪T400控制方案优化

针对热轧棒材倍尺飞剪高速剪切时存在速度滞后并超调,影响产品质量,制约生产线运行速度的问题,对采用T400工艺板控制的热轧棒材倍尺飞剪,从原理上解析速度给定曲线对负载电流的影响,以参数化编程的方式实现控制方案优化。生产运行结果表明,采用优化控制方案,实现了倍尺飞剪高速精确剪切,达到了工艺要求的控制效果。     

滚筒式飞剪的PLC─APC控制系统

介绍了利用可编程序控制器进行位置自动控制（PLC—APC）系统的构成，给出了剪切的数学模型和控制框图，最后介绍了飞剪剪切参数计算。     

滚筒式飞剪的PLC—APC控制系统

介绍了利用可编程序控制器进行位置自动控制（ＰＬＣ－ＡＰＣ）系统的构成，给出了剪切的数学模型和控制框图，最后介绍了飞剪剪切参数估计。     

高线飞剪控制原理及故障处理

本文着重介绍了高线飞剪的工作过程和控制原理。飞剪的起动和制动电流、恒速剪切速度及工作周期是飞剪控制的关键参数,只有控制好上述参数,才能确保飞剪正常运行。此外,还简要地介绍了飞剪的常见故障及其处理方法。     

GE Rx7i PLC在热连轧带钢生产线飞剪控制系统中的应用

本文主要介绍GE Rx7i PLC在热连轧带钢生产线飞剪定尺剪切控制系统中的应用,分析飞剪剪切控制原理,推导飞剪剪切方程,对提高飞剪的作业率和带钢质量以及下一步升级优化剪切具有较高的参考价值与指导意义.     

在设计的同时进行仿真——Autodesk Inventor Professional在DANIELI冶金设备(北京)有限公司的应用

飞剪机的主要任务是将运行着的轧件按照工艺要求定尺剪断.随着轧机轧制速度和生产能力的不断提高,提高飞剪的速度和性能已成为人们致力研究的问题之一.飞剪机种类很多,根据其不同的剪切断面和速度快慢,被应用于不同的场合.目前较先进的机型为起停式曲柄飞剪,该飞剪一般处于静止状态,剪切时采用低惯量大扭矩直流电机,直接完成起动、剪切和制动等工艺过程.其实物模型如图1所示.     

起动式飞剪的微型机控制

用微机完成起动式飞剪对高速线材的剪切,可以提高剪切精度,降低废品率,具有很高的经济效益。本文讨论了飞剪微机控制系统的数学模型,提出自动校正砰-砰控制开关参数闭环位置系统的算法,并给出实现该系统的微机硬件和软件结构框图。     

遗传/粒子群混合算法在飞剪机结构优化中的应用

飞剪机结构参数设计需满足若干技术性能要求才能保证剪切质量。飞剪机结构参数优化设计问题要满足多个非线性约束要求,同时需优化多个目标函数,提出遗传算法/粒子群混合算法用于曲柄连杆式飞剪机结构参数优化设计,结合各自算法的优势,在算法运行初期利用遗传算法的全局搜索能力进行优化搜索,在算法运行后期利用粒子群较强的局部搜索能力进行搜索,综合考虑多个目标函数和约束条件,通过实例计算表明,该混合方法可以稳定、有效的获取到满意的优化设计结果。     

飞剪机结构参数优化设计

飞剪机是连续式轧钢机组中重要而复杂的辅助设备，其结构参数设计的好坏直接影响剪切质量。飞剪机结构参数优化设计问题属非线性的多目标优化问题，以模拟退火算法为代表的计算智能方法在求解此类优化问题中体现了一定了优势，本文利用改进的模拟退火算法（Improved Simulated Annealing，ISA）对曲柄连杆式飞剪机结构参数进行优化设计，将整个优化过程分成若干个阶段，根据各个子目标函数优化的状态，采用不同的退火系数和归一化系数，综合考虑多个目标函数和约束条件，通过实例计算表明，该方法可以稳定、有效的获取到满意的优化设计结果。     

铁芯片数控横剪生产线中的速度同步控制

横剪线是变压器铁芯硅钢片生产的专用设备,可将一定宽度的硅钢卷料按照操作者预先编制的程序剪切成各种形状硅钢片料.由于整条生产线上的送料轨道较长,为了保证剪切精度,使硅钢片在导轨中能够高速平稳的传送,就需要在送料导轨上安装一台拉料电机.本文主要介绍如何使拉料电机与送料电机实现速度的匹配.     

彩涂生产线入口自动测宽及测径分析

为了实现唐钢彩涂板带钢处理线入口钢卷的自动上卷,以保证处理线连续稳定生产的工艺要求,研究了入口段对来料钢卷的直径以及宽度进行准确的自动化测量的方法。通过系统自动对钢卷直径和宽度的测量,分析了生产线入口段的工艺流程以及自动化控制系统中相应测宽、测径的数学模型及运算方法;分析了在实际应用中对系统以及现场设备精度的要求。实际应用结果表明,采用该技术可提高生产力和产品质量。     

高线飞剪控制系统

介绍高线飞剪控制系统,该系统采用主轧线S7-400PLC,配置FM458功能模块对飞剪进行逻辑控制、精确剪切、精准定位,从而实现系统的安全可靠运行。     

单电机控制模式在宽厚板定尺剪系统中的研究与开发

在宽厚板生产线中,定尺剪通常设计配备两台主剪刃电机,随着各钢铁厂降低生产成本工作的推进,在满足生产工艺的要求下,单台主剪刃电机运行控制模式逐渐被开发和广泛应用。本论文以国内某钢铁厂宽厚板生产线为例,重点介绍了定尺剪主剪刃单电机控制模式的研究与开发工作。通过生产验证,该方法在能够满足工艺要求的情况下,节能效果明显,可以在其他生产线上广泛推广。     

Advanced adaptive feed control for CNC machining

In computer numerical control (CNC) machining, the tool feed rate is crucial for determining the machining time. It also affects the degree of tool wear and the final product quality. In a mass production line, the feed rate guides the production cycle. On the other hand, in single-time machining, such as for molds and dies, the tool wear and product quality are influenced by the length of machining time. Accordingly, optimizing the CNC program in terms of the feed rate is critical and should account for various factors, such as the cutting depth, width, spindle speed, and cutting oil. Determining the optimal tool feed rate, however, can be challenging given the various machine tools, machining paths, and cutting conditions involved. It is important to balance the machining load by equalizing the tool's load, reducing the machining time during no-load segments, and controlling the feed rate during high load segments. In this study, an advanced adaptive control method was designed that adjusts the tool feed rate in real time during rough machining. By predicting both the current and future machining load based on the tool position and time stamp, the proposed method combines reference load control curves and cutting characteristics, unlike existing passive adaptive control methods. Four different feed control methods were tested including conventional and proposed adaptive feed control. The results of the comparative analysis was presented with respect to the average machining load and tool wear, the machining time, and the average tool feed speed. When the proposed adaptive control method was used, the production time was reduced up to 12.8% in the test machining while the tool life was increased.     

基于飞剪实现轨迹规划的滴灌带打孔控制系统设计

本文以滴灌带生产线打孔单元为研究对象,阐述了基本工艺流程以及打孔工艺的控制难点。基于和利时MC运动控制器给出系统设计方案,对控制算法设计进行说明。控制系统采用优化的飞剪算法实现打孔轴运动轨迹的实时规划,达到自动纠偏的目的,保证系统稳定运行,避免频发的故障停机。经测试,该控制系统满足生产要求,运行稳定可靠,性能提升显著。     

基于OMRONPLC的特种车辆钢结构件／JUT控制系统设计

该文筒述了某特种车辆钢结构件的生产工艺和加工设备,重点介绍了控制系统的硬件设计和应用软件流程图。选用OMRON公司的小型PLCCPM2A作为中央处理单元,实现对钢结构件加工的定位、切割、称重、焊接、成品检测等关键功能的自动控制,得到了高效率、高精度的控制效果,降低了工人的劳动强度。     

A novel dynamic holding system for thin metal plate shearing machines

Metal shearing machines are heavy equipments usually linked to low added-value due to the small amount of technological devices incorporated. However, this situation can be changed through equipment designers' creativity. Analysing some specific operations, it can be observed that some tools, when coupled to the equipment, should substantially increase the cutting process productivity and the final product quality. Regarding the thin metal plates shear process, it can be found that in the cutting final stage, the cut material weight is suspended by a small material section still requiring to be cut. This leads to strip tip deformation, causing poor quality of the final product, which cannot stay fully plan. This work was developed around this problem, studying the best solution to develop a new tool able to avoid the lack of plate flatness after cut. A novel equipment was designed, able to be easily connected to the shearing machine, following the blade movement throughout cut operation. The system is fully-automated, being operated by a single cut instruction given by the machine operator. This system allows the manufacturing company to increase the added-value of each machine, offering advanced and desirable solutions to the customers, and contributing as well to the company business sustainability.