基于MCGS组态软件的机械手控制系统设计

如何利用机械手更好地提高生产的自动化水平,减轻操作者劳动强度,实现安全生产具有重要意义。选用一种具有5个自由度,可水平、垂直移动、±90°自由旋转的机械手,提出了基于MCGS组态软件的机械手控制系统的设计方案,通过MCGS组态软件以动画形式显示机械手的动作过程,实现该机械手工作过程的实时控制和图像监控。同时采用PLC作为该系统的控制器,通过相应指令程序实现机械手的控制要求,提高该机械手控制系统操作的自动化水平。该研究为机械手的智能控制提供了设计基础。     

基于MCGS组态软件的机械手控制系统设计北大核心

如何利用机械手更好地提高生产的自动化水平,减轻操作者劳动强度,实现安全生产具有重要意义。选用一种具有5个自由度,可水平、垂直移动、±90°自由旋转的机械手,提出了基于MCGS组态软件的机械手控制系统的设计方案,通过MCGS组态软件以动画形式显示机械手的动作过程,实现该机械手工作过程的实时控制和图像监控。同时采用PLC作为该系统的控制器,通过相应指令程序实现机械手的控制要求,提高该机械手控制系统操作的自动化水平。该研究为机械手的智能控制提供了设计基础。     

基于MCGS的粉末成型机控制系统设计

介绍全中文工控组态软件MCGS的组成、结构与特性,并以“全自动粉末成型机的控制系统”开发为例,阐述MCGS的组态过程及实现的主要功能.工程实践表明:该系统操作简便、可靠性高,具有较好的推广应用价值.     

组态软件监控PLC实现机床的自动加工控制

文章介绍一种利用组态软件MCGS监控PLC实现机床自动加工控制的方法,重点介绍了实现该方法的PLC和组态软件之间的数据联系。介绍了组态软件数据库变量的设置和实现PLC自动加工的程序设计,以及组态软件MCGS运行的脚本程序。通过该方法,可以在控制室利用现场I/O接口传递信息,实现对加工机床的自动控制。在环境恶劣、危险和有害的工作现场,该方法有很大的优越性,对提高系统和人身安全具有重大意义。     

PLC伺服控制在太阳能电池组件搬运机械手中的应用

针对太阳能电池组件生产过程中存在的工人劳动强度大和生产效率低等问题,设计一种采用真空吸盘结构的太阳能电池组件搬运机械手,搭建由PLC(可编程控制器)、伺服电机及驱动器构成的控制系统,并提出一种基于PLC的位置伺服控制方法.系统PLC程序采用模块化思想进行设计,并利用组态软件对触摸屏进行组态,通过串行端口建立PLC与触摸屏之间的通讯,实现PLC与触摸屏对搬运机械手的联合控制.应用结果表明,搬运机械手及其控制系统具有较好的交互性与灵活性且机械手自动运行过程稳定可靠达到了预期的设计目的.     

分布式控制在水泥粉磨站自动控制系统中的应用

在水泥生产中，为充分发挥磨机的生产能力，提高产品产量和质量，改善劳动条件，保证生产系统高效可靠的运行和提高生产过程的自动化水平，迫切需要有较高性能的控制系统实现整个水泥生产的自动控制。为满乓以上要求，我们研制开发了分布式控制系统实现水泥生产过程的自动控制。它具有集中控制，集中监视和管理的功能，取代了以往的继电器联锁的控制方式和单元仪表检测，达到了较高的控制水平。本文介绍了此控制系统的硬件组成，功能。WINCC工控组态软件特点，程序编制以及在控制系统调试过程中的经验和体会。     

基于PLC和MCGS的实时生产数据采集系统

文章针对某炮弹装配兵工厂实时数据管理系统的应用需求,提出了基于工控组态软件MCGS与可编程控制器PLC的数据采集实现。PLC采用西门子S7-300系列,组态软件采用MCGS,通信方式采用工业以太网,数据存储采用ODBC方式,外部数据库采用SQL Server 2008数据库。文中详细介绍了组态软件MCGS与PLC之间的通信过程以及数据存储到外部SQL Server2008的具体实现,并且数据可以在生产管理系统中实时的显示。     

汽车车桥的柔性自动化焊接控制系统研究

提出了一种基于PLC网络的汽车车桥柔性自动化焊接控制生产线设计方案,根据汽车车桥生产工艺流程,重点介绍了汽车车桥焊接中典型单台设备的PLC选型及应用,组建的PLC三层网络控制系统以及MCGS组态的上位监控。该控制系统易于改进,集散控制性好,有利于汽车车桥的焊接生产走向柔性自动化控制,尤其在小型汽车车桥生产厂家体现了降低人工劳作与管理,保障生产品质,提高生产效率的优势。     

基于反向挤压机械化装备伺服控制技术的应用

针对反向挤压机械化装备,阐述了机械化装备系统的构成、工艺流程、伺服系统组成,伺服系统与PLC之间的通讯报文设置等。以活动垫片装卸机械手行走为例,运用伺服控制技术及可编程序控制器PLC对活动垫片装卸机械手进行准确定位位置控制,实现了活动垫片装卸机械手行走位置自适应调节,并详细分析了采用GRAPH编程语言实现活动垫片装卸机械手位置闭环控制程序。通过设计基于PLC的伺服控制系统,实现了利用机械手完成活动垫片反向挤压过程中的供锭、供垫、供模等自动控制过程,该伺服控制系统已成功应用于正反向双动铝挤压机的生产中,配合加热炉及铝挤压机后区生产线,极大地缩短了反向挤压过程中的非挤压时间,提高了自动化水平及生产效率。     

基于InTouch的组态设计

阐述了基于组态软件InTouch的自动监控系统的设计,并通过实践指出,该系统的实现减轻了员工的劳动强度,提高了工作效率及管理的自动化水平,确保了安全生产。     

Effects of Post-weld Heat Treatment on Microstructure,Mechanical Properties and the Role of Weld Reinforcement in 2219 Aluminum Alloy TIG-Welded Joints

In as-welded state, each region of 2219 aluminum alloy TIG-welded joint shows diff erent microstructure and microhardness due to the diff erent welding heat cycles and the resulting evolution of second phases. After the post-weld heat treatment, both the amount and the size of the eutectic structure or θ phases decreased. Correspondingly, both the Cu content in α-Al matrix and the microhardness increased to a similar level in each region of the joint, and the tensile strength of the entire joint was greatly improved. Post-weld heat treatment played the role of solid solution strengthening and aging strengthening. After the post-weld heat treatment, the weld performance became similar to other regions, but weld reinforcements lost their reinforcing eff ect on the weld and their existence was more of an adverse eff ect. The joint without weld reinforcements after the post-weld heat treatment had the optimal tensile properties, and the specimens randomly crack in the weld zone.     

The First Phase of the SRIF Industrialized Base in ＂West Area＂ Has Been Put into Operation

After nearly two years＇ tense construction, the first phase of industrialized base of Shenyang Research Institute of Foundry （SRIF）, located at the Tiexi Casting and Forging Industrial Park in the west of Tiexi District, has now been completed and formally put into operation.     

Effect of Rare Earth Doping on Impedance,Modulus and Conductivity Properties of Multiferroic Composites:0.5(BiLa_xFe_(1-x)O_3)–0.5(PbTiO_3)

The Lanthanum-doped bismuth ferrite–lead titanate compositions of 0.5(Bi LaxFe1-xO3)–0.5(Pb Ti O3)(x = 0.05,0.10,0.15,0.20)(BLxF1-x-PT) were prepared by mixed oxide method.Structural characterization was performed by X-ray diffraction and shows a tetragonal structure at room temperature.The lattice parameter c/a ratio decreases with increasing of La(x = 0.05–0.20) concentration of the composites.The effect of charge carrier/ion hopping mechanism,conductivity,relaxation process and impedance parameters was studied using an impedance analyzer in a wide frequency range(102–106Hz) at different temperatures.The nature of Nyquist plot confirms the presence of bulk effects only,and non-Debye type of relaxation processes occurs in the composites.The electrical modulus exhibits an important role of the hopping mechanism in the electrical transport process of the materials.The ac conductivity and dc conductivity of the materials were studied,and the activation energy found to be 0.81,0.77,0.76 and 0.74 e V for all compositions of x = 0.05–0.20 at different temperatures(200–300 °C).     

Quantitative Analysis of the Crystallographic Orientation Relationship Between the Martensite and Austenite in Quenching–Partitioning–Tempering Steels

The orientation relationships(ORs)between the martensite and the retained austenite in low-and medium-carbon steels after quenching–partitioning–tempering process were studied in this work.The ORs in the studied steels are identified by selected-area electron diffraction(SAED)as either K–S or N–W ORs.Meanwhile,the ORs were also studied based on numerical fitting of electron backscatter diffraction data method suggested by Miyamoto.The simulated K–S and N–W ORs in the low-index directions generally do not well coincide with the experimental pole figure,which may be attributed to both the orientation spread from the ideal variant orientations and high symmetry of the low-index directions.However,the simulated results coincide well with experimental pole figures in the high-index directions{123}_(bcc).A modified method with simplicity based on Miyamoto’s work was proposed.The results indicate that the ORs determined by modified method are similar to those determined by Miyamoto’method,that is,the OR is near K–S OR for the low-carbon Q–P–T steel,and with the increase of carbon content,the OR is closer to N–W OR in medium-carbon Q–P–T steel.     

The Mirror with Patterns of Auspicious Animals and Grapes——Exquisite cast mirror and the technology of surface tin-enrichment by rubbing-in and infiltration of tin-rich powder

<正>Bronze mirrors were used by the Chinese people before the introduction of the glass mirror.Only after it was replaced by the glass mirror did the bronze mirror gradually retreat from people's lives.Different styles of bronze mirrors were made in different historical periods,particularly in the Warring States Period,the Han and Tang Dynasties,which were the three peaks of the development of bronze mirror arts in ancient China.The casting techniques were exquisite.The surface of the bronze mirror was smooth and bright enough to reflect one's image,and there were scarcely any casting defects on the mirror surface.On the back of the bronze mirror,there were rich depictions of Arts and Humanities,and the ornamentations were also     

The 9th China International Diecasting Congress & Exhibition

The 9th China International Diecasting Congress ＆ Exhibition was held on July 22-24, 2014 at Shanghai New International Expc Centre. This exhibition was the most successful over the years, with over 6890 visitors and 155 exhibitors, and the exhibition area increased by 30% from 9,500 square meters in 2012 to 12340 square meters. Die casting enterprises from a total of 24 countries and regions, including China mainland, Chinese Taiwan and Hong Kong, South Korea, Japan, Germany, India, Thailand, Malaysia, the United States, Russia, Australia, Iran, Ukraine, Brazil, Colombia, Singapore, Austria, Canada, Croatia, France, Turkey, United Kingdom, Vietnam, attended the congress and exhibition.     

Introduction of the Fluid Control Engineering Institute of Kunming University of Science and Technology

正The Fluid Control Engineering Institute of Kunming University of Science and Technology was set up in 1996.The researches of institute concentrate on electro-hydraulic(pneumatic)servo/proportional control and hydromechatronics.The Institute is committed to research and development of electro-hydraulic control of high-end technical equipment in ferrous metallurgy refining produc-     

RARE METALS Volume Contents

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Antimony Induced Crystallization of Amorphous Silicon

Antimony induced crystallization of PVD (physics vapor deposition) amorphous silicon can be observed on sapphire substrates. Very large crystalline regions up to several tens of micrometers can be formed. The Si diffraction patterns of the area of crystallization can be observed with TEM (transmission electron microscopy). Only a few and much smaller crystals of the order of 1μm were formed when the antimony layer was deposited by MBE (molecular beam epitaxy) compared with a layer formed by thermal evaporation. The use of high vacuum is essential in order to observe any Sb induced crystallization at all. In addition it is necessary to take measures to limit the evaporation of the antimony.     

A CUMULATIVE FATIGUE DAMAGE RULE UNDER THE ALTERNATIVE OF CORROSION OR CYCLIC LOADING

Fatigue damage increases with the applied loading cycles in a cumulative manner and the material deteriorates with the corrosion time. A cumulative fatigue damage rule under the alternative of corrosion or cyclic loading was proposed. The specimens of aluminum alloy LY12-CZ soaked in corrosive liquid for different times were tested under the constant amplitude cyclic loading to obtain S-N curves. The test was carried out to verify the proposed cumulative fatigue damage rule under the different combinations among corrosion time, loading level, and the cycle numbers. It was shown that the predicted residual fatigue lives showed a good agreement with the experimental results and the proposed rule was simple and can be easily adopted.