共查询到19条相似文献,搜索用时 125 毫秒
1.
吴伍彬 《工业仪表与自动化装置》2012,(5):89-91,97
详细介绍了炼钢厂板坯连铸二切定尺测距原理以及定尺系统的应用情况,同时对出现的故障进行了详尽的分析.该系统实现了板坯的准确切割,满足了中板厂各种长度规格的切割需求. 相似文献
2.
3.
本文介绍了基于计算机图像处理连铸板坯长度测量和切割控制系统的硬件构成和软件功能。讨论了摄像机参数标定方法和系统测量误差。 相似文献
4.
《计算机集成制造系统》2017,(11)
针对中厚板面向订单的生产是先设计母板及板坯后实施的生产组织模式,研究综合考虑母板、板坯允许的多种断面与长度规格及其转换关系的母板板坯集成优化设计问题,将其归结为一种同时对母板、板坯断面及长度规格不确定性进行决策的下料问题。以最小化无订单余材和热轧切边等加工过程材料损失为目标,将板坯的断面与长度设计柔性转化为模型的约束条件,建立非线性混合整数规划模型;设计结合禁忌搜索与列生成技术的混合优化求解算法:禁忌搜索编码采用一对多的映射方式降低搜索空间维数,以进行板坯断面的优化选择;解码时对母板、板坯长度和下料方法进行设计,子问题为考虑长度柔性和材料加工损耗的母板设计问题,通过设计改进的列生成方法求解;针对问题特征设计了适用的邻域结构、禁忌对象等算法要素。基于某钢铁企业生产数据进行案例计算,结果表明了所提模型及求解方法的可行性和有效性。 相似文献
5.
板坯火焰切割机是板坯连铸机后区的主要设备,利用PLC及变频器进行控制,现场使用表明,在高温连续生产的条件下,该装置能快速准确地完成各种规格的板坯的切割,提高了生产效率,同时该切割机还适用于切割温度从室温至900℃连铸坯、碳素钢和低合金钢等,应用范围较广。 相似文献
6.
连铸板坯切割生产过程中对铸坯长度的控制具有关键作用,自板坯连铸投产以来,经常出现因定尺测量不准而造成非定尺坯长,或测量辊不转而完全手动切坯,带来大宗非定尺废品,对铸坯定尺废品率影响较大,增加了生产成本,于是我们对其检测控制系统进行改进,并取得了明显成效。 相似文献
7.
8.
9.
连铸坯的长度在线检测和定长切割是连铸生产工艺流程中亟需解决的关键问题。目前,该工艺流程中大部分测量系统采用接触式测量,由于生产工况恶劣,随着设备不断运行,系统精度随之衰减。为解决该问题,文中提出了利用计算机视觉测量技术,建立非接触式连铸钢坯长度在线测量和定长切割控制系统,提高测量精度,减少设备维护时间,提高生产效率。 相似文献
10.
11.
为了解决板坯库出库计划的编制问题,提出了将板坯库出库计划分解为板坯出库优化决策和板坯最优倒垛决策组合优化问题,分别建立了板坯出库优化决策模型和板坯最优倒垛决策模型,利用两个模型分层协作完成出库计划的编制。为求解模型,构造了一种离散粒子群优化算法,采用适合模型的粒子取值方式和粒子速度变化方式。实际排产的结果表明,所建立的模型和算法切实可行。 相似文献
12.
为了进行矩形波导光束整形系统的设计研究,利用Zemax软件模拟了部分端面抽运板条激光器波导光束整形系统光束整形过程,该系统能够将抽运光束整形成满足激光器要求的线形抽运光束.理论分析表明:矩形平面波导在整形系统中起到了至关重要的作用,波导长度变化对光强分布的均匀化有影响,矩形平面波导存在临界长度. 相似文献
13.
针对冷轧薄板企业热处理工序的生产特点,研究了热处理工序的优化配料装炉问题,提出了在满足实际生产工艺等约束前提下的整炉配料和尾号混装配料方法。为解决混装配料问题的复杂性,给出了钢卷相似性参数的定义和相应的启发式求解方法。该配料方法在实际生产中得到了应用,并取得了良好效果。 相似文献
14.
15.
Incremental upset-forging of spur gear forms around the surfaces of short length axisymmetric billets of different length to diameter ratios is simulated using a free body equilibrium approach based on the slab method of analysis. The mechanics of the process are analysed employing both the mixed cylindrical and Cartesian coordinate systems as well as an entirely cylindrical coordinate system. The theoretical results of die loads estimated from the above approaches are compared with those observed experimentally and calculated previously by the authors using the upper-bound elemental technique. 相似文献
16.
In the design and troubleshooting of aero-engine pipeline, the vibration reduction of the pipeline system is often achieved by adjusting the hoop layout, provided that the shape of pipeline remains unchanged. However, in reality, the pipeline system with the best antivibration performance may be obtained only by adjusting the pipeline shape. In this paper, a typical spatial pipeline is taken as the research object, the length of straight-line segment is taken as the design variable, and an innovative optimization method of avoiding vibration of aero-engine pipeline is proposed. The relationship between straight-line segment length and parameters that determine the geometric characteristics of the pipeline, such as the position of key reference points, bending angle, and hoop position, are derived in detail. Based on this, the parametric finite element model of the pipeline system is established. Taking the maximum first-order natural frequency of pipeline as the optimization objective and introducing process constraints and vibration avoidance constraints, the optimization model of the pipeline system is established. The genetic algorithm and the golden section algorithm are selected to solve the optimization model, and the relevant solution procedure is described in detail. Finally, two kinds of pipelines with different total lengths are selected to carry out a case study. Based on the analysis of the influence of straight-line segment length on the vibration characteristics of the pipeline system, the optimization methods developed in this paper are demonstrated. Results show that the developed optimization method can obtain the optimal single value or interval of the straight-line segment length while avoiding the excitation frequency. In addition, the optimization efficiency of the golden section algorithm is remarkably higher than that of the genetic algorithm for length optimization of a single straight-line segment. 相似文献
17.
18.
对板坯连铸机中板坯(坯壳)的鼓肚变形问题,考虑了坯壳在高温下呈现黏弹性性态以及弹性变形与黏性变形的耦合特性,提出了连铸板坯鼓肚变形的四边固支黏弹性矩形板模型。根据Laplace变换和弹性-黏弹性相应原理,导出了黏弹性板柸在拉氏域内的四阶偏微分方程,再将其导入拉氏域内的哈密顿正则方程。对全状态矢量利用分离变量法、本征函数展开法、共轭辛正交归一化关系和Laplace逆变换,得到了四边固支黏弹性矩形坯壳在时域内的挠度解析解。以某板坯连铸机为例,分析了弹性变形、蠕变变形和松弛时间对鼓肚变形的影响,以及坯壳中点的单位长度弯矩随时间的变化情况。 相似文献
19.