CIMS环境下PDM与ERP信息集成的分析与研究

论述了PDM和ERP信息集成的必要性，分析了PDM和ERP集成的信息内容，探讨了CAD／CAPP／CAM、PDM和ERP之间的集成关系，结合国内外CIMS信息集成研究的最新成果和制造业的现状，依据CIM原理，构造了基于集成数据模型的PDM和ERP系统集成框架，给出了构造集成框架的关键步骤并分析了其实现方法。为企业PDM和ERP的集成提供了可借鉴的模式。     

PDM与CAD/CAPP/ERP集成应用浅析

PDM与CAD/CAPP/ERP的集成应用是推进企业整体信息化的重要途径。详细介绍了PDM与CAD/CAPP/ERP之间的功能和关系,探讨了集成应用实施总体规划,从集成内容内核心、集成方式等方面分析了PDM与CAD/CAPP/ERP的集成以及在企业应用中的实现,为制造企业实施PDM与CAD/CAPP/ERP的集成提供了有益的借鉴。     

基于并行工程的企业集成化信息系统

基于并行工程的设计理念,针对某公司的企业信息化需求,定制开发了集产品数据管理(PDM)与企业资源规划(ERP)于一体的企业集成化信息系统.系统面向成套电器企业,支持该类企业电器控制柜产品的开发设计和生产管理.详细介绍了该系统的体系结构、功能特点以及实现的关键技术.实际应用表明:该系统实现了企业产品设计信息与生产管理信息在企业内部之间的集成与共享,较好地解决了电器控制柜产品开发生产过程中管理与技术的集成,提高了企业产品设计与生产能力.     

基于数字化工厂的制造业信息化集成平台

分析了现代制造企业信息化平台的问题,研究了数字化工厂DFS功能特点,及其在CAX / PDM /ERP信息系统平台中的必要性,提出了完整的制造企业信息化集成平台,探索了基于数据库的数字化工厂系统与PDM系统间的集成技术.     

基于PLM的制造企业应用系统集成的研究

异构系统间的信息的交换与共享在制造业信息系统集成中有着重要的作用,PLM系统是制造企业信息化工程的重要集成平台。通过分析CAX、PLM与ERP系统集成的必要性及集成时的要点,针对各自系统的特点,提出了一种基于PLM的CAX、PLM与ERP的集成方法,采用Web Service作为集成的技术支撑平台,利用XML文件作为中间转化格式,来实现系统的信息资源的交换与共享,以达到资源的合理化利用。     

面向模具制造业的PDM技术应用

PDM是一门管理所有与产品相关的信息和所有与产品相关的过程的技术,它是一门集数据库的数据管理能力、网络通讯能力与过程控制能力于一体的工程数据管理综合技术。本文结合作者对深圳模具企业(只针对塑胶模具企业)调研过程中了解的模具制造业生产模式的特点及对信息化的需求,探讨面向模具制造的PDM技术应用,包括总体目标、数据模型,以及产品配置、CAD/CAM/CAE技术集成、并行工程等PDM系统实施中关键技术等。     

基于AutoCAD协同设计技术的产品数据管理系统

对基于AutoCAD协同设计技术的产品数据管理(PDM)系统进行了研究。阐述了AutoCAD的协同设计技术,分析了网络化协同设计模式,进而提出了利用AutoCAD协同设计技术的产品数据管理系统的体系结构;在此基础上,从系统的集成、设计过程管理、设计资源库的建立等方面入手,研究了系统实现的关键技术。研究的结果为集成企业现有的设计资源、构建支持协同设计的PDM系统提供了一种切实可行的方法。     

迦南科技集团有限公司启动PDM／CAPP及ERP项目，Extech／用友携手助推

2008年9月10日，迦南科技集团有限公司（以下简称迦南科技）召开了PDM、ERP项目实施启动大会，标志着该企业的PDM／CAPP及ERP项目的实施工作正式拉开帷幕。中国制造业信息化的领军企业Extcch与国内最大的管理软件提供商用友公司将联手为迦南科技实施PDM／CAPP以及ERP项目。     

PDM与ERP系统集成在辅机制造中的应用

通过对汽车发动机辅机制造行业的分析,研究该行业PDM特点,总结PDM与ERP系统的集成框架,选取直接对数据库访问的集成方法,根据关系型数据库特点设计了PDM与ERP系统集成的数据库,开发了相应的模块.依据现代管理理念,对企业PDM与ERP系统数据库进行集成,增加了数据传输读取速度,提高了工作效率,使企业具有一定的竞争力能力.     

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.     

Thermodynamics Study on the Decomposition of Chromite with KOH

Institute of Process Engineering, Chinese Academy of Sciences, China, has proposed a method for oxidative leaching of chromite with potassium hydroxide. Understanding the mechanism of chromite decomposition, especially in the potassium hydroxide fusion, is important for the optimization of the operating parameters of the oxidative leaching process. A traditional thermodynamic method is proposed and the thermal decomposition and the reaction decomposition during the oxidative leaching of chromite with KOH and oxygen is discussed, which suggests that chromite is mainly destroyed by reactions with KOH and oxygen. Meanwhile, equilibrium of the main reactions of the above process was calculated at different temperatures and oxygen partial pressures. The stable zones of productions, namely, K2CrO4 and Fe2O3, increase with the decrease of temperature, which indicates that higher temperature is not beneficial to thermodynamic reactions. In addition, a comparison of the general alkali methods is carried out, and it is concluded that the KOH leaching process is thermodynamically superior to the conventional chromate production process.     

Influence of Heat Treatment on Damping Behaviour of the Magnesium Wrought Alloy AZ61

The effect of isochronal heat treatments for 1h on variation of damping, hardness and microstructural change of the magnesium wrought alloy AZ61 was investigated. Damping and hardness behaviour could be attributed to the evolution of precipitation process. The influence of precipitation on damping behaviour was explained in the framework of the dislocation string model of Granato and Lücke.     

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.     

Using Finite Element and Contour Method to Evaluate Residual Stress in Thick Ti-6Al-4V Alloy Welded by Electron Beam Welding

This work was to reveal the residual stress profile in electron beam welded Ti-6Al-4V alloy plates(50 mm thick) by using finite element and contour measurement methods.A three-dimensional finite element model of 50-mmthick titanium component was proposed,in which a column–cone combined heat source model was used to simulate the temperature field and a thermo-elastic–plastic model to analyze residual stress in a weld joint based on ABAQUS software.Considering the uncertainty of welding simulation,the computation was calibrated by experimental data of contour measurement method.Both test and simulated results show that residual stresses on the surface and inside the weld zone are significantly different and present a narrow and large gradient feature in the weld joint.The peak tensile stress exceeds the yield strength of base materials inside weld,which are distinctly different from residual stress of the thin Ti-6Al-4V alloy plates presented in references before.     

Microstructures and Tensile Properties of Ultrafine-Grained Ni–(1–3.5) wt% SiC_(NP) Composites Prepared by a Powder Metallurgy Route

Silicon carbide nanoparticle-reinforced nickel-based composites(Ni–Si CNP),with a Si CNPcontent ranged from1 to 3.5 wt%,were prepared using mechanical alloying and spark plasma sintering.In addition,unreinforced pure nickel samples were also prepared for comparative purposes.To characterize the microstructural properties of both the unreinforced pure nickel and the Ni–Si CNPcomposites transmission electron microscopy(TEM) was used,while their mechanical behavior was investigated using the Vickers pyramid method for hardness measurements and a universal tensile testing machine for tensile tests.TEM results showed an array of dislocation lines decorated in the sintered pure nickel sample,whereas,for the Ni–Si CNPcomposites,the presence of nano-dispersed Si CNPand twinning crystals was observed.These homogeneously distributed Si CNPwere found located either within the matrix,between twins or on grain boundaries.For the Ni–Si CNPcomposites,coerced coarsening of the Si CNPassembly occurred with increasing Si CNPcontent.Furthermore,the grain sizes of the Ni–Si CNPcomposites were much finer than that of the unreinforced pure nickel,which was considered to be due to the composite ball milling process.In all cases,the Ni–Si CNPcomposites showed higher strengths and hardness values than the unreinforced pure nickel,likely due to a combination of dispersion strengthening(Orowan effects) and particle strengthening(Hall–Petch effects).For the Ni–Si CNPcomposites,the strength increased initially and then decreased as a function of Si CNPcontent,whereas their elongation percentages decreased linearly.Compared to all materials tested,the Ni–Si CNPcomposite containing 1.5% Si C was found more superior considering both their strength and plastic properties.     

Directional Growth of Tin Crystals Controlled by Combined Solute Concentration Gradient Field and Static Magnetic Field

A new method was introduced to achieve directional growth of Sn crystals. Microstructures in liquid(Pb)/liquid(Sn) diffusion couples were investigated under various static magnetic fields. Results show that the β-Sn crystals mainly reveal an irregular dendritic morphology without or with a relatively low static magnetic field(B0.3 T). When the magnetic field is increased to 0.5 T, the β-Sn dendrites close to the final stage of growth begin to show some directional character. With a further increase in the magnetic field to a higher level(0.8–5 T), the β-Sn dendrites have an enhanced directional growth character, but the dendrites show a certain deflection. As the magnetic field is increased to 12 T, the directional growth of the β-Sn dendrites in the center of the couple is severely destroyed. The mechanism of the directional growth of the β-Sn crystals and the deflection of the β-Sn crystals with the application of static magnetic field was tentatively discussed.     

电化学噪声数据处理方法概述

综述了常见的电化学噪声数据处理方法,介绍了直流趋势剔除、统计分析、快速傅立叶变换(FFT)法计算功率谱密度(PSD)以及小波变换处理电化学噪声信号的基本过程,并阐释了各种数学处理及所得参数的物理意义。