基于PLC的物料分拣机械手自动化控制系统设计(含CAD图纸和说明书)
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附件2:外文原文 On the Development Trend of Numerical Control TechnologyAbstract: With the rapid development of the computer industry, this technology has also undergone a fundamental change is the application areas in recent years developed very rapidly in a comprehensive high-tech, the article at home and abroad, analyzes the development of numerical control technology trend. Keywords: CNC Technology Trends Smart CNC technology is a set of computer technology, automation and control technology, measurement technology, modern machinery manufacturing technology, microelectronics, information processing technology, an integrated multi-disciplinary cross-technology, application areas in recent years developed very rapidly in a comprehensive high-tech. It is to meet the high-precision, high speed, complex parts processing and there is automatic, digital, flexible, information-oriented, integrated, network-based foundation, the soul of modern machine tools and equipment and the core, has a wide range of application fields and broad application prospects. 1, numerical control technology and equipment development trends and countermeasures The equipment industrys technical level and degree of modernization of the entire national economy determines the level and degree of modernization, numerical control technology and equipment is the development of new high-tech industry and cutting-edge industries (such as information technology and its industry, biotechnology and its industry, aviation, aerospace, etc. defense industry industries) enabling technology and basic equipment. Marx once said, the difference between the various economic era, is not what is produced, but rather how to produce, what the production of labor. Manufacturing technology and equipment is the most basic of human means of production activities, while the numerical control technology is todays most advanced manufacturing technology and equipment, the core technology. Widely adopted by nations in the world manufacturing numerical control technology to improve manufacturing capacity and level, to improve the dynamic changing market adaptability and competitiveness. In addition, all industrial countries in the world and CNC numerical control technology and equipment will also be listed as a national strategic goods, not only to take significant steps to develop its own CNC technology and its industry, but also in the sophisticated numerical key technologies and equipment to China imposition of closures and restrictions. In short, the vigorous development of numerical control technology as the core of advanced manufacturing technology has become the worlds developed countries to accelerate economic development, enhance overall national strength and an important way to statehood. CNC technology is to use digital information on the mechanical movement and the work process control technology, CNC numerical control technology and equipment is represented by new technologies on traditional manufacturing industries and the penetration of the formation of new manufacturing electromechanical integrated product, so-called digital equipment , and its technology, covering many areas: (1) Mechanical manufacturing technology; (2) information processing, processing and transmission technology; (3) automatic control technology; (4) servo drive technology; (5) sensor technology; (6) software technology. Second, the development of numerical control system at home and abroad overviewWith the rapid development of computer technology, the traditional manufacturing industries began a fundamental change, the industrialized countries invested heavily in modern manufacturing technology research and development and put forward a new manufacturing model. In modern manufacturing systems, numerical control technology is the key technology, which combines micro-electronics, computer, information processing, automatic detection, automatic control and other high-tech in one, with high precision, high efficiency, flexibility and automation features to achieve flexible manufacturing automation, integrated, intelligent play a decisive role. At present, the numerical control technology is undergoing a fundamental transformation, from special-purpose closed-open-loop control mode to the general-purpose real-time dynamic open-loop control mode. In an integrated basis, numerical control system to realize ultra-thin, ultra-small; in based on intelligent, integrated computers, multimedia, fuzzy control, neural networks, multi-disciplinary technical, numerical control system to realize high-speed, high-precision, efficient control of during processing can automatically correct, regulation and compensation of various parameters to achieve an online intelligent fault diagnosis and treatment.For a long time, Chinas numerical control system for the traditional closed architecture, CNC machine tool only as a non-intelligent motion controller. Machining process variables based on experience in advance the form of a fixed parameter setting, the actual processing of pre-processing by hand or through a CAD / CAM and automated programming systems to prepare. CAD / CAM and CNC is no feedback between the control link, the entire manufacturing process, CNC is a closed-door open-loop enforcement agency. In a complex environment and the changeable conditions, the combination of processing tool, workpiece material, spindle speed, feed rate, tool path, cutting depth, step length, machining allowance, and other processing parameters can not be in the field environment, under the external disturbances and random factors, real-time dynamic adjustment of feedback control can not be more random links to amend CAD / CAM in the set amount, thus affecting the working efficiency and product CNC machining quality. Thus, the traditional CNC system, such a fixed process control mode and closed architecture, limited to the multi-variable intelligent control of CNC development, has not suited to the increasingly complex manufacturing process, therefore, to develop numerical control technology as the core of the advanced manufacturing technology has become our country to accelerate economic development, enhance overall national strength and an important way to statehood.Third, the development trend of numerical control technology The application of CNC technology to traditional manufacturing industry is not only a revolutionary change in the manufacturing industry to become a symbol of industrialization, and with the numerical control technology, continuous development and expansion of application fields, his peoples livelihood some of the important development of the industry plays a an increasingly important role. NC from the current world trend of technological development, mainly the following aspects: 1. High-precision, high-speed development trend Although more than 10 years ago, the trend appeared in high-precision high-speed, but the scientific and technological development is not enough, high-precision, high-speed is also changing the connotation of being towards the development of accuracy and speed limits. Efficiency, quality is the main body of advanced manufacturing technology. High-speed, high-finishing technology can greatly improve efficiency, improve product quality and grades, and shorten the production cycle and improve market competitiveness. To this end, Japan will study advanced technologies listed it as one of five major modern manufacturing technology, the International Institute of Production Engineering be identified as the 21st century, one of the central research directions. In the car industry, the production of an annual output of 300,000 beat is 40 seconds / vehicle, and most varieties of processing is a car equipped with one of the key issues that must be addressed; in aviation and aerospace industry, its processing parts are mostly thin-walled and thin bars, stiffness is poor, aluminum or aluminum alloy material, and only at high cutting speed and cutting force in the case of a small can of these ribs, the wall processing. Recently, large single piece aluminum alloy billets, hollowed out approach to create the wings, fuselage and other large parts to replace multiple components through a large number of rivets, screws and other connecting means assembly, so that components of the strength, stiffness and reliability. These are made of processing equipment, high speed, high precision and high flexibility requirements. 2.-Axis simultaneous machining, and rapid development of complex machine tools 5-axis machining of three-dimensional curved surface parts can be used the best tool for cutting geometry, not only finish high, but efficiency is greatly improved. Is generally believed that, 1 5-axis machine tools can equal the efficiency of 2 sets of 3-axis machine tools, particularly the use of cubic boron nitride and other superhard materials, high-speed milling cutter hardened steel components, 5-axis simultaneous machining comparable three-axis process giving a higher efficiency. But in the past due to 5-axis numerical control system, host complex structure and other reasons, its price than the 3-axis CNC machine tools are several times higher, plus the programming more difficult, limiting the development of five-axis machine tools. Present, due to the emergence of spindle, allowing to achieve 5-axis simultaneous machining of composite spindle head structure greatly simplified and its manufacturing difficulties and costs significantly reduced, narrowing the gap between the price of CNC system. Therefore, the promotion of the composite spindle head type five-axis machine tools and complex machining machine tools (including the 5-sided machining, machine tools) development. 3. Intelligent, open, network-based development of contemporary numerical control system the main trends CNC equipment in the 21st century will be a certain intelligent systems, intelligent content included in the numerical control system in all areas: the pursuit of processing efficiency and processing quality of the intelligence, such as the adaptive control process, process parameters automatically generation; To improve drive performance and the use of intelligent and convenient connections, such as feedforward control, the electrical parameters of the adaptive computing, automatic identification of negative auto-selection model, self-tuning, etc.; to simplify programming and streamline operational aspects of intelligence, such as smart Auto-oriented programming, intelligent man-machine interface, etc.; there are intelligent diagnosis, intelligent control aspects, to facilitate the system diagnosis and maintenance. To address the traditional closed and CNC numerical control system application software industrial production problems. At present, many countries conduct a study of open CNC system, CNC system and opening up has become a numerical control system of the future path. The so-called open-architecture CNC system is the development of numerical control system can be run in a unified platform for machine tool manufacturers and end users, by changing, adding or cutting the structure object (numerical control function), the formation of serialization, and can be easily users for special applications and technical know-how into the control system, quick realization of different varieties and different grades of open CNC system, to form a distinctive brand personality. Currently open CNC system architecture specification, communication specifications, configuration specifications, operating platform, CNC system function library and function of numerical control system software development tools is the core of current research. NC network equipment is well-known international machine tool fair the past two years a new bright spot. NC network equipment will greatly satisfy the production lines, manufacturing systems, manufacturing information integration needs of enterprises, but also to achieve new manufacturing paradigms such as agile manufacturing, virtual enterprises, global manufacturing base unit. Some well-known at home and abroad CNC machine tools and CNC manufacturing companies are launched in the last two years, the related new concepts and prototypes, reflecting the NC machine to the network in the direction of the trend. IV Conclusion As people focus on the numerical control technology, its development more and more rapidly. This paper briefly presented the current development trend, additional numerical techniques are steadily becoming integrated, parallel, there are still vast room for development. References:1 Wang Lixin. On the numerical control technology, the development trend of J. Chifeng College, 2007.2 DONG Chun. Numerical control system of the new trends in technology development J. Programmable controllers and factory automation, 2006.3 Ya-Li. Outlined the development of a new trend of NC J. Land and Resources of Higher Vocational Education Research, 2005.4 Fang. CNC technology development and means of J. Science and Technology Information, 2008. 本科生毕业论文(设计)开题报告表论文(设计)名称基于PLC的物料分拣机械手自动化控制系统设计论文(设计) 来源论文(设计)类型指导教师学生姓名学号班级一、 研究或设计的目的和意义:目的:本文主要针对生产线上的自动化设计了一个四自由度物料分拣机械手,实现生产的自动化。该机械手选用圆柱坐标型,能实现机械手的伸缩,升降,旋转,加紧和放松等动作;驱动系统采用气压驱动,实现了伸缩、升降、旋转、夹紧和放松等动作。控制系统采用PLC控制,机械手设手动和自动两种工作方式,可以通过转换开关进行工作方式转换。系统设有报警功能,当机械手出现故障时,能及时报警。同时采用了RGB颜色传感器检测物料的颜色,可以对不同颜色的物料进行分拣。意义:伴随着机电一体化在各个领域的应用,机械设备的自动控制成分显得越来越重要,由于工作的需要,人们经常受到高温、腐蚀及有毒气体等因素的危害,增加了工人的劳动强度,甚至于危机生命。因此机械手就在这样诞生了,机械手是机械手系统中传统的任务执行机构,是机器人的关键部件之一。其中的工业机械手是近代自动控制领域中出现的一项新技术,它的发展是由于其积极作用正日益为人们所认识:它能部分地代替人工操作;能按照生产工艺的要求,遵循一定的程序、时间和位置来完成工件的传送和装卸;广泛的应用机械手,可以逐步改善劳动条件,更强与可控的生产能力,加快产品更新换代,提高生产效率和保证产品质量,消除枯燥无味的工作,节约劳动力,提供更安全的工作环境,降低工人的劳动强度,减少劳动风险,提高机床,减少工艺过程中的工作量及降低停产时间和库存,显著地提高劳动生产率,提高企业竞争力,加快实现工业生产机械化和自动化的步伐。本设计拟开发的上料机械手可在空间抓放物体,动作灵活多样,可代替人工在高温和危险的作业区进行作业,可抓取重量较大的工件,采用PLC控制,和传统继电器控制相比较,具有稳定性高,接线简单,抗干扰能力强,维修方便等优点。可以简化控制线路,节省成本,进一步提高劳动生产率。2、 研究或设计的国内外现状和发展趋势: 1、国内外PLC发展现状和发展趋势:PLC自问世以来,经过40多年的发展,在美、德、日等工业发达国家已成为重要的产业之一。世界总销售额不断上升、生产厂家不断涌现、品种不断翻新。产量产值大幅度上升而价格则不断下降。目前,世界上有200多个厂家生产PLC,较有名的:美国:AB通用电气、莫迪康公司;日本:三菱、富士、欧姆龙、松下电工等;德国:西门子公司;法国:TE 施耐德公司;韩国:三星、LG公司等。我国的PLC产品的研制和生产经历了三个阶段:1、顺序控制器(19731979)2、以微处理器为主的工业控制器(19791985)3、以微处理器为主的可编程序控制器(1985以后)。在对外开放政策的推动下,国外PLC产品大量进入我国市场,一部分随成套设备进口。随着不断的学习与不断开拓的精神,现在,我国自主生产的PLC在国内的各行各业也有了极大的应用,技术含量也越来越高。PLC的发展趋势:(1)产品规模向大、小两个方向发展大:I/O点数达14336点、32位为微处理器、多CPU并行工作、大容量存储器、扫描速度高速化。小:由整体结构向小型模块化结构发展,增加了配置的灵活性,降低了成本。(2)PLC在闭环过程控制中应用日益广泛(3)不断加强通讯功能(4)新器件和模块不断推出高档的PLC除了主要采用CPU以提高处理速度外,还有带处理器的EPROM或RAM的智能I/O模块、高速计数模块、远程I/O模块等专用化模块。(5)编程工具丰富多样,功能不断提高,编程语言趋向标准化有各种简单或复杂的编程器及编程软件,采用梯形图、功能图、语句表等编程语言,亦有高档的PLC指令系统。(6)发展容错技术采用热备用或并行工作、多数表决的工作方式。(7)追求软硬件的标准化。2、国内外机械手的发展现状和发展趋势:目前,国际上的机械手公司主要分为日系和欧系。日系中主要有安川、oTC、松下、FANLUC、不二越、川崎等公司的产品。欧系中主要有德国的KUKA、CLOOS、瑞典的ABB、意大利的C0毗U及奥地利的工GM
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