资源目录
压缩包内文档预览：
编号：122571888
类型：共享资源
大小：897.52KB
格式：ZIP
上传时间：2021-04-20
上传人：221589****qq.com
认证信息
个人认证
李**（实名认证）
湖南
IP属地：湖南
40
积分
- 关 键 词：
-
定截距型轴类
形状
零件
上料仓
设计
- 资源描述：
-
定截距型轴类形状零件上料仓设计,定截距型轴类,形状,零件,上料仓,设计
- 内容简介：
-
密 级分类号编 号成 绩本科生毕业设计 (论文)外 文 翻 译原 文 标 题An Analysis of Dual shuttle AutomatedStorage/Retrieval systems译 文 标 题关于立体化仓库使用双货叉的探讨作者所在系别作者所在专业作者所在班级作 者 姓 名作 者 学 号指导教师姓名指导教师职称完 成 时 间 译文标题关于立体化仓库使用双货叉的探讨原文标题AnAnalysisofDualShuttleAutomated Storage/RetrievalSystems作 者BrettA.Peters译 名布雷特 A.彼得国 籍美国原文出处爱思唯尔期刊摘要：本文主要探讨的是可以提高生产效率的双货叉立体仓库系统。通过使用该系统，可以缩短堆垛机在一个双任务流程中的运行时间，从而大大提高了仓库的工作效率。双货叉仓库系统相当于一个四任务指令模（uadruplecommandmode简称QC）中的双指令任务书流程。一个很有建设性的思想被提出来，即通过堆垛机按某一顺序运行可以缩短在一个（QC）中的运行时间，蒙地卡罗对此进行了模拟对比实验，实验结果证明确实提高了堆垛机的搬运效率，这就说明了这种方案的可行性。关键词：自动化立体仓库 自动化立体仓库的控制 功能模拟和分析1. 绪论 自动化立体仓库被广泛地应用于仓储和制造设备当中。典型的单位货物装卸立体仓库由储藏架，堆垛机，自动运输小车，和入库/出库台组成。衡量一个立体仓库系统的优劣的主要标准是仓库系统的工作效率。立体仓库的工作效率与堆垛机运行一个工作流程所需的时间成反比，这个工作流程时间包括堆垛机装卸货物的时间，显然堆垛机装卸货物的时间在一定程度上取决于堆垛机和货架的具体结构和规格。 Han通过立体仓库返回站点的排列提高了立体仓库的工作能力，合理的排列返回站点堆垛机能减少不必要的行程，从而缩短了时间，提高了效率。这样他们就提出了一种最大限度提高效率理论，即如果堆垛机在双指令模块流程中可以缩短运行时间那么这将最大程度的提高立体仓库的工作效率。也就是说，如果堆垛机运行的是单命令路线，却能完成存货和返回的动作，则工作效率的提高也就实现了。 在论文中，我们分析了一种可供选择的堆垛机设计方法，这种设计出来的堆垛机与一般的堆垛机不同，在原来的基础增加了一个货叉，这种新颖设计的堆垛机拥有两个货叉，它在运作中可以缩短在货架到返回点之间的运行时间。这种设计方案符合Han所说的最大效率理论。双货叉堆垛机主要是针对如何提高堆垛机的工作能力这一问题所设计的一种新颖堆垛机。目前，立体仓库系统的研究是以单货叉堆垛机为主要对象。在本文关于双货叉堆垛机功能的分析也是建立有前人研究的基础上的。2. 可供选择的堆垛机设计 一个基本的单一装载立体仓库系统中，每一个货架巷道内都有一台可供操作的堆垛机，每台堆垛机有一根立柱被固定在天花板和地面之间，这根立柱可以在巷道内的水平位置移动。与立柱相连的是一个货叉机构，它可以载着货物沿着立柱上下移动，货叉也可以作相对于货格的水平取货和存货运动。 一个基本的单货叉堆垛机立体仓库系统能够完成一个单指令作业流程也能完成一个双指令作业流程。一个单指令作业流程由存货和取货组成，对于一个存货过程所需时间包括堆垛机在入库处装载货物，行驶到目标货格，卸下货物，然后回到仓库入口处这一连串动作总共所需的时间。同样可以分析取货过程所需时间。 一个双指令流程就是在同一个工作流程中完成存货和取货的操作。这个过程时间包括从入口处装货，运行到存货货格位置，把货放在货架上，空运行到取货货格位置，从货架上取下货物，回到仓库入口处，并卸下货物这一过程总共需要的时间。如果我们对堆垛机的双指令工作流程路线稍加分析就会发现，当在完成一个取货运作时，就暗示着可以进行下一个存货运作，而且，如果在同一地方可以进行存货和取货运作，那么运行时间将被缩短，这个运行时间相当于运行一个单指令流程所需的时间。就目前已存在的立体仓库设计，要实现这种操作是不可能的，因此，另外一种双货叉式的堆垛机就应运而生了。3. 堆垛机的运作 设想一台安装了两个货叉的堆垛机,这种新颖的堆垛机可以同时装载两件货物,为了两件货物分别能存库和出库,所以堆垛机的两个货叉机构能够相互独立运行,具体结构如图3所示,这种堆垛机的工作过程将在下文详细介绍。 堆垛机从仓库入口处将要被储存的货物装载到第一个货叉平台上，然后向货的位置移动.到达要取货的位置之后，第二个货叉台伸货格内取货，当取货的动作完成之后，堆垛机控制第一个货叉台卸货。堆垛机然后再回到入口处。这整个操作流程就像是一个单指令运作再加上一小段重新定位运行过程（即堆垛机第二个货叉平台装载和卸载过程），这样一来，其运作就像一台堆垛机完成先完成取货然后再存货的一个双任务命令。 因为这种堆垛机有两个货叉平台，所以两个货叉的定位控制将是系统的一个很重要的功能。堆垛机用两个货叉可以在某个货架的同一位置完成一个存、取双任务指令，先在空货驻台上取下要出库的货物，再移动第二货叉到指定位置把货物放在空货格内。然而，货叉平台结构的选择与本文的讨论内容无关。 为了实现上述操作，堆垛机的第二个货叉必须在第一个货叉完成取货动作之后才能进行定位操作。由于货叉的定位移动量是较小的，堆垛机采用的是低速爬行方式来实现货叉微小的定位移动量，在这个过程中所耗费的时间与堆垛机在装货卸货耗费的时间相比一般是微乎其微的。仓库设计的另外一个特点是第一排货格和最后一排货格的两端要留有位置余量，以便在堆垛机超程时给两个货叉平台留有运动余地。4. 工作效率的提高 为了估算正在设计的双货叉系统工作量的提高，我们引用Bozer和White提出的有关单任务和双任务指令所需时间理论和Hanetal.提出的最近有意义想法价值理论，这些理论家都作了种种设想，他们设想的共同部分就是我们要引用的内容，下面就是这些理论的内容。仓库的货架被考虑成为连续矩形框架，货物出/入处被设置在货格的左下角位置。货架的长度和宽度以及堆垛机水平和垂直运行的速度应该明确。堆垛机货叉台能同时在水平和垂直两个方向运动，在计算运行时间方面作如下处理，货叉在水平和垂直方向时进行匀速运动，加速和减速缓冲极限速度，爬行速度用来定位两个货叉台。假设与物流过程相关的装载货物和卸载货物所用的时间为常量，因此，可以把它简单的加到运行时间中去。堆垛机只能以单指令要求和双指令要求为基础，例如，不允许堆垛机在巷道内多次启停。（这个分假设后来应用于新设计的堆垛机完成四重作业流程。为了符合最短邻近的启发思想，取货数n可用来排列，且在货格内有m个开放的位置。5. 双货叉堆垛机系统新设计的堆垛机有两个货叉台,因此可以对其进行双货叉系统的操作:同时搬运两件货物并分别把它们放置在指定的位置,在不同位置取两件货物并回到出入口.上述工作流程能通过在四个不同的位置存、取操作来实现。因此，运行时间将由一个单指令任务时间再加上三个运行时间。为了更有效的完成上述四个操作，在完成一个双指令任务操作中就包含完成了在一个位置存、取操作。这种被称为四指令任务流程的模拟操作系统能减少运行时间，因而比此前的所提的模拟系统要更能提高效率。四重指令任务流程能在仓库的任意一位置完成存储操作，而取货程序是按照先到先服务的原则处理。即使如此，合理的按排取货的顺序也能显著的减少四种操作中的运行时间，Han曾经这样分析以提高单货台立体仓库系统的工作效率。本文的分析也是以他们的研究为基础的。6. 结论 本文对自动化立体仓库中的一种双货架堆垛机进行了较为详细的分析，应用这种仓储系统所带来的好处表现在以下两个方面：1四种操作运行中与单一货叉的堆垛机相比，双货叉堆垛机可以提高工作效率的范围是40%到45%。 2一个双任务操作中，双货叉的设计显著缩短了运行时间。双货叉系统使提高仓库的工作效率成为可能。这种设计主要的缺点是要增加堆垛机的额外成本。在决定是否适合于某一特定情况时，对其经济估算通常是必要的。尽管如此，基于立体仓库工作效率的考虑，双设计货叉台堆垛机系统还是大有前景的。双货架系统的概念也可延伸到其它物流系统中去。因此，在这项工作时有必要对其它仓库系统（比如基本的仓储系统）进行战略考虑，相比之下以便于发现它们在提高工作效率方面的不足这处，本文还提供了一种双货叉自动化立体仓库的分析框架并为其它与之相关的一些研究提供了基础。 AnAnalysisofDualShuttleAutomated Storage/RetrievalSystemsAbstract:Thispaperaddressesthethroughputimprovementpossiblewiththeuseofadualshuttleautomatedstorageandretrievalsystem.Withtheuseofsuchasystem,travelbetweentimeinadualcommandcycleisvirtuallyeliminatedresultinginalargethroughputimprovement.Thedualshuttlesystemisthenextendedtoperformanequivalentoftwodualcommandsinonecycleinaquadruplecommandmode(QC).AheuristicthatsequencesretrievalstominimizetraveltimeinQCmodeisdeveloped.MonteCarlosimulationresultsareprovidedforevaluatingtheheuristicsperformanceandshowthatitperformswell,achievinglargethroughputimprovementscomparedwiththatofthedualcommandcycleoperatingunderthenearestneighborretrieval sequencing heuristic.Keywords:Automated warehouse Automatic control of the three-dimensional werhouse Funcyional simuiation and analysis1. IntroductionAutomated warehouse is widely used in warehousing and manufacturing equipment. The unit cargo warehouse by typical storage shelves, stacking machine, automatic transport vehicle, and import and export platform. The main standard to measure a warehouse system is warehouse system efficiency. The work efficiency of warehouse and stacker the operation required a work flow time is inversely proportional to the flow time including stacker loading time, stacker loading time obviously depends on the stacker and shelf structure and specifications. Han through three-dimensional warehouse return site arrangement, improve the three-dimensional warehouse work ability, reasonable arrangement back Back to the site of stacking to reduce unnecessary travel function, so as to shorten the time and improve the efficiency. So they proposed to maximize the efficiency of theory, namely if the stacker in double instruction module process can shorten the running time it will maximize warehouse efficiency. That is to say, if the stacker is running a single command line, it can complete the inventory and return to action, improve the work efficiency is also achieved.In this paper, we analyze an alternative stacker stacker design method, and the general design of the stacking machine this is different, a fork are added, the novel design of stacker has two forks, it can shorten the operation time to return to the point between the on the shelf in the operation. The design conforms to the theoretical maximum efficiency Han said. Double fork stacker is mainly for a novel stacker stacker to improve the ability to work the problem of design. At present, research on warehouse system is to fork stacker as the main object. In this paper, a double fork stacker function The analysis is based on previous studies.2. Alternative stacker designA basic loading single warehouse system, each shelf tunnel have a stacker for stacking machine operation, each one upright post is fixed between the ceiling and the ground, this column can move the horizontal position in the tunnel. And the column is connected to a goods fork mechanism, it can be loaded with goods moving along the column, the fork can also be compared with the level of prices of goods and goods inventory movement. A basic single fork stacker warehouse system can complete a single instruction process can complete a double instruction process. A single instruction process by the goods, the time required for an inventory process including the stacker in storage at the loading of the goods, driving to the target prices of goods and unloading of cargo, and then returned to the warehouse at the entrance of the total time required for a series of actions. The same can analyze the time required to pick up.A dual instruction process is the completion of inventory and delivery operations in the same working process. This process includes the time from the entrance to the inventory of goods loading, operation location, put the goods on the shelves empty run to the prices of goods location pick up, take the goods from the shelves, back to the warehouse at the entrance and discharge this process requires a total time of goods.If we double the stacker work instruction process route some analysis will be found, when completed in a freight operation, suggests that the inventory can the next operation, and, if in the same place to goods operation, so the running time will be shortened, the running time of the equivalent of running a single instruction, the time required to process. The existing warehouse design, the operation is not possible, therefore, in addition to a double fork type stacking machine came into being.3. The operation of a stackerImagine a computer installed stacker two fork, this novel stacker can be loaded at the same time two pieces of goods, in order to two pieces of goods can respectively store and warehouse, so the two fork mechanism of stacker can run independently, the specific structure as shown in Figure 3, the working process of the stacker in the following details.The stacker loads the stored goods from the entrance of the warehouse to the first pallet platform and then supplies the goods.The location of the mobile. After arriving to pick up the position, the second fork Taiwan extension goods shelf pick up, when to pick up the finished stacking machine to control the first fork stacker. Taiwan unloading and then return to the entrance. The whole process is like a single instruction operation plus a short re positioning operation the process (i.e. second stacker fork platform for loading and unloading process, as a result, its operation) is like a stacking machine to complete the first complete a double task and then pick up the inventory orders.Because the stacker two fork platform, so the positioning control two fork will be a very important function of the system. The two fork can complete a deposit in the same location of a shelf stacker, taking double task instructions, to take in air cargo warehouse in Taiwan the goods, then move second fork to the specified location of the goods on the goods shelf. However, regardless of the content selection and the discussion of the fork platform structure.In order to achieve the above operation, second fork stacker must complete the pickup action only after the positioning operation in the first fork. The positioning fork movement amount is small, stacker is used to realize the positioning of crawling fork small amount of movement of the time of discharge time and stacking machine the cost in the process of loading in general is very little compared. Another characteristic of warehouse design is the two ends of the first and last row row goods lattice SKUs to leave the position to give allowance, two fork left room for movement in the platform stacker overrun.4. Improved work efficiencyIn order to work double fork system is designed to improve the estimation, we refer to the single task and dual task command Bozer and White proposed the time required for Han et al. theory and proposed recently meaningful ideas of value theory, these theorists have made assumptions, they want to set common part is that we will quote the content the following is the content of the theory, warehouse shelves were considered. A continuous rectangular frame, the goods / office is set in the prices of goods in the lower left corner position. Speed rack length and width and vertical and horizontal stacker operation should be clear. The fork stacker can be the same In the horizontal and vertical direction of the two movement, following treatment in the calculation of the running time, the fork of the uniform motion in the horizontal and vertical direction, acceleration and deceleration buffer limit speed, crawl speed used to locate the two fork. Assumption and logistics process related loading and unloading of goods in time therefore, it can be a constant, simple to operation time. The stacker only to single instruction requirements and dual instruction requirements for the foundation, for example, does not allow multiple stacking machine start and stop in the tunnel. (stacker this hypothesis was later applied to the new design of finishing four in line with the short process. Adjacent to the Enlightenment of thoughts, N can be used to pick up the number and arrangement of m open position in the cargo box.5. Double pallet stacker systemThe new design of the stacker two fork, so you can double fork on the operation of the system. At the same time handling two pieces of goods are placed in the specified position in a different location from two pieces of goods and return to the entrance. The work flow can pass in four different positions. To achieve the operation. Therefore, the running time will be from a single instruction task time plus three hours of operation. In order to complete the four operations, after the completion of a dual task operation contains instructions completed in a position, take the operation. This is called the simulation operating system the four task flow instructions can reduce the running time, so it is better than the The simulation system had asked more. It can improve the efficiency of four instruction can complete the task flow storage operation in the warehouse at any location, and pick up program is on a first come, first served principle. Even so, reasonable arrange pick up the order also can significantly reduce the running time of operation in four once, Han analysis to improve single cargo warehouse system working efficienc
- 温馨提示:
1: 本站所有资源如无特殊说明，都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
2: 本站的文档不包含任何第三方提供的附件图纸等，如果需要附件，请联系上传者。文件的所有权益归上传用户所有。
3.本站RAR压缩包中若带图纸，网页内容里面会有图纸预览，若没有图纸预览就没有图纸。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 人人文库网仅提供信息存储空间，仅对用户上传内容的表现方式做保护处理，对用户上传分享的文档内容本身不做任何修改或编辑，并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容，请与我们联系，我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
人人文库网所有资源均是用户自行上传分享，仅供网友学习交流，未经上传用户书面授权，请勿作他用。
川公网安备: 51019002004831号