硅外延设备中PLC驱动软件的设计与实现

外延工艺位于集成电路产业链的前端，为后续工艺提供完美单晶外延层衬底，是整个产业链的基础。进行硅片外延工艺的装备，即硅外延装备，其控制系统采用PLC+上位机的分布式控制模式。因此，用于PLC与上位机之间通信的驱动软件对于整个控制系统的实现有着十分重要的意义。采用现代软件开发中的面向对象和组件化思想，以清晰的模块组织管理方式，设计了一个基于FINS协议的，可扩展、低耦合、可重用的某型硅外延装备控制系统PLC驱动软件。     

CPLD在3-DOF并联机器人运动控制中的应用

分析三自由度平移并联机器人的运动模型,在此基础上设计该并联机器人的运动控制系统,控制系统采用PC机为上位机、DSP运动控制器为下位机的双CPU硬件结构的分级控制方式,上位机负责整个系统管理、轨迹生成等,下位机则实现对各个关节的插补运算和伺服控制,控制系统以交流伺服电机来驱动并联机器人,采用基于CPLD的脉冲发生电路来控制伺服电机,从而控制整个并联机器人的运动,并运用相应的软件进行仿真.     

VB6.0实现上位机与OMRON PLC通讯

基于OMRON C200HE PLC组建的接触器自动生产线控制系统,由上位机与各功能单元PLC链接通讯,采集生产现场数据并显示,使其从设备级的控制发展到工厂级的控制。每台PLC必须与上位机连接,上位机监控PLC数据区状态,控制通信进程。本文详细介绍了PLC的具体配置及1∶N通讯软件的编程方法,以及采用VB 6.0控件,实现了上位机与各PLC分机多机通讯的关键程序。     

基于PC和PLC的绕线机数控系统研究

本文介绍了一种基于PC-PLC双机控制的数控绕线系统。一方面，上位机采用面向对象的编程技术，提供了友好的人机界面，实现了绕线工艺的可编程化；另一方面，下位机采用PLC驱动执行器和接收控制信号，提高了系统可靠性。实践证明，上述控制系统应用于绕线机具有操作简单，运行可靠，工艺参数修改方便，自动化程度高等优点。     

基于 PLC与组态技术的变转速液压系统设计

在液压综合实验台的改造设计中采用三菱FX1N系列PLC进行控制,用PC作为上位机实时监控整个控制系统,用PLC作为下位机在现场控制仪器设备,构建一个简单、直观的液压换向回路,实现了机电液一体化的完美结合.     

基于WINCC的柔性制造系统的监控系统的设计

文章以PC作为上位机,以西门子公司的S7-300的PLC作为下位机,构建了柔性制造系统的控制系统,以WINCC作为上位机的组态软件,在上位机PC和下位机PLC之间通过现场总线PROFIBUS_DP进行通信,通过VB开发了显示整个柔性制造系统运行过程的ActiveX控件,从而建立了柔性制造系统的监控系统。系统的实际运行表明系统设计合理,工作稳定可靠,软件操作简单,便于升级。     

一种数控布带缠绕机系统研制

针对预浸布带缠绕成型工艺的要求,在传统卧式数控车床基础上设计了一种新型数控布带缠绕机。根据缠绕工艺要求,研究数控布带缠绕机的机械结构;基于华中8型数控系统设计了驱动控制系统;结合三菱PLC、触摸屏等开发了车间现场交互控制系统;构建了上位机采集监测系统,采用FTP协议实现了上位机与数控系统间G代码文件的上传下载;利用Modbus协议实现了PLC状态数据的实时采集。通过运行测试,验证了该系统加工效率高、扩展性能好,具有较高工程应用价值。     

一种熔铸型炸药冒口自动去除装置的设计

描述了一套自动去除冒口装置的机构原理、功能实现及控制系统硬件和软件的设计方法。采用PLC和工控机两级控制结构,控制系统结构简洁、运行可靠并且调试方便。采用工业控制领域中广为应用的PROFIBUS现场总线构建分布式控制系统,实现对去冒口装置的远程控制。基于西门子公司的Win CC系统开发了上位机人机操作界面,为整个自动化控制系统提供了一款便于操作、性能可靠的智能软件。该装置实现了去冒口装置的自动控制,节省了大量的人力,提高了整个去冒口过程的安全性和自动化水平。     

氧化沟活性污泥法污水处理控制系统设计

针对目前我国污水处理系统发展过程中所提出的"高效低耗"要求,根据氧化沟活性污泥法污水处理工艺的特点,提出应用InTouch组态软件作为上位机监控软件设计污水处理控制系统的方法.阐述控制系统的整体结构和硬件配置方案,介绍应用InTouch创建上位机界面、实现监控功能以及与下位机PLC之间通信的方法.调试结果表明,该控制系统能够满足工艺要求.     

基于PLC的矿用圆环链闪光对焊机控制系统

以矿用圆环链大容量闪光对焊机为研究对象,在简要介绍焊机机构和焊接工艺的基础上,设计了对焊机的控制系统硬件结构和软件程序。控制系统以西门子S7-200PLC为控制核心,搭建了控制系统硬件模块并对各模块完成了选型。重点讨论了控制软件的设计流程,利用软件编程实现了焊接工艺的预热、闪光、重复闪光、顶锻等过程,上位机采用了工业触摸屏,对触摸屏系统软件界面进行了详细设计。同时系统中加入了上位机控制,提高了整个系统的可靠性和可操作性。经过工业现场验证表明,环链闪光对焊机运行稳定、故障率低,满足了市场的需要。     

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.     

新型的治疗阿尔茨海默氏症药物(1-二甲基磷酰基-2,2,2-三氯)-乙基-1-醇烟酸醋对体外神经细胞的作用

目的: 观察本实验室合成的一种治疗阿尔茨海默氏症(AD)的药物(1-二甲基磷酰基-2, 2, 2 -三氯)-乙基^-1-醇烟酸醋(NMF),对体外培养的皮层神经细胞活性的影响以及对海人藻酸(KA)所致的神经损伤的保护作用。方法: 采用体外培养皮层神经元的方法,解剖分离 15 d胚胎小鼠皮层神经细胞, 接种于 96孔板,48 h 后加药并培养 72 h,以 MIT 法 观察 NMF 对小鼠皮层神经细胞活性的影响;同时将接种于 24 孔板的细胞预先给予 NMF,d 3 时加或不加KA处理后,以台盼蓝染色鉴别并计数死、活细胞,可得出细胞的存活率。结果: NMF 明显促进胎鼠皮层神经元活性,其中 NMF1、0. 1、10nmol·L^-1促进神经元活性增殖率分别高达 34.7%、37.4%、36. 7%, NMF 明显促进正常胎鼠皮层神经元存活卒,与对照组比较,10nmol·L^-1 NMF 对皮层神经元的存活率分别提高 39.3%、73.5%。 NMF能显著 对抗 KA 所致的神经元损伤,与 KA 损伤组相比, NMF0.1、10、10nmol·L^-1对损伤皮层神经元的保护率分别为 77.30%、80.10%、84.15%。结论: NMF 明 显促进胎鼠皮层神经元的洁性、提高正常皮层神经元,的存活卒,并能有效地保护KA所致的神经元损伤,提示 NMF 是一种很有潜力的治疗 AD 的药物。     

Theoretical Analysis for the Motion and Temperature of Melt Droplets in Spray Degassing Process

The motion of melt droplets in spray degassing process was analyzed theoretically. The height of the treatment tank in spray degassing process could be determined by the results of theoretical calculation of motion of melt droplets. To know whether the melt droplets would solidify during spraying process, the balance temperature of melt droplets was also theoretically analyzed. Then proof experiments for theoretical results about temperature of melt droplets were carried. In comparison, the experimental results were nearly similar to the calculation results.     

Growth Kinetics of Single Inclusion Particle in Molten Melts

On the basis of the single-particle framework, a new theory on inclusion growth in metallurgical melts is developed to study the kinetics of inclusion growth on account of reaction and collision. The studies show that the early growth of inclusion depends on reaction growth and Brawnian motion collision, and where the former is decisive, the late growth depends on turbulence collision and Stokes＇ collision, and where the former is dominant; collision growth is very quick during the smelting process, lessened in the refining process, but nearly negligible in the continuous casting process.     

An Easy Way to Quantify the Adhesion Energy of Nanostructured Cu/X(X=Cr,Ta,Mo,Nb,Zr) Multilayer Films Adherent to Polyimide Substrates

An approach based on film buckling under simple uniaxial tensile testing was utilized in this paper to quantitatively estimate the interfacial energy of the nanostructured multilayer films(NMFs) adherent to flexible substrates. The interfacial energies of polyimide-supported NMFs are determined to be *5.0 J/m2 for Cu/Cr, *4.1 J/m2 for Cu/Ta,*2.8 J/m2 for Cu/Mo, *1.1 J/m2 for Cu/Nb, and *1.2 J/m2 for Cu/Zr NMFs. Furthermore, a linear relationship between the adhesion energy and the interfacial shear strength is clearly demonstrated for the Cu-based NMFs, which is highly indicative of the applicability and reliability of the modified models.     

High-Speed Friction Stir Welding of SiC_p/Al–Mg–Si–Cu Composite

A 17 vol% SiCp/Al–Mg–Si–Cu composite plate with a thickness of 3 mm was successfully friction stir welded(FSWed) at a very high welding speed of 2000 mm/min for the first time. Microstructural observation indicated that the coarsening of the precipitates was greatly inhibited in the heat-affected zone of the FSW joint at high welding speed, due to the significantly reduced peak temperature and duration at high temperature. Therefore, prominent enhancement of the hardness was achieved at the lowest hardness zone of the FSW joint at this high welding speed, which was similar to that of the nugget zone. Furthermore, the ultimate tensile strength of the joint was as high as 369 MPa, which was much higher than that obtained at low welding speed of 100 mm/min(298 MPa). This study provides an effective method to weld aluminum matrix composite with superior quality and high welding efficiency.     

Three-Dimensional Growth of Coherent Ferrite in Austenite: A Molecular Dynamics Study

Coherent second phase often exhibits anisotropic morphology with specifi c orientations with respect to both the second and the matrix phases. As a key feature of microstructure, the morphology of the coherent particles is essential for understanding the second-phase strengthening eff ect in various industrial alloys. This letter reports anisotropic growth of coherent ferrite from austenite matrix in pure iron based on molecular dynamics simulation. We found that the ferrite grain tends to grow into an elongated plate-like shape, independent of its initial confi guration. The fi nal shape of the ferrite is closely related to the misfi t between the two phases, with the longest direction and the broad facet of the plate being, respectively, consistent with the best matching direction and the best matching plane calculated via the Burgers vector content(BVC) method. The strain energy calculation in the framework of Eshelby's inclusion theory verifi es that the simulated orientation of the coherent ferrite is energetically favorable. It is anticipated that the BVC method will be applicable in analysis of anisotropic growth and morphology of coherent second phase in other phase transformation systems.     

A STUDY OF TEMPERATURE-DEPENDENT VALENCE BOND STRUCTURE OF TITANIUM

On the basis of energy and shape method for the determination of the valence bond (VB) structures of crystal, the valence bond structure of titanium is redetermined at room temperature and calculated in the whole temperature range of 0-1943K. The outer shell electronic distribution of Ti is e_c~(2.9907) · (s_c~(0.4980) d_c~(2.4927)) ef1.0093 in crystal. The temperature dependences of the VB structures of hcp and bcc phases are the same. The VB structures of hcp and bcc phases monotonically increase or decrease with the increase in temperature, but show discontinuous changes at the phase-transformation temperature 1155K.     

Structural Optimization of Electromagnetic Swirling Flow in Nozzle of Slab Continuous Casting

During the slab continuous casting process, the flow field of molten steel in the mold plays a decisive role in the quality of the slab. In this paper, electromagnetic swirling flow in nozzle technology is proposed to control the flow field in mold.This technology can drive molten steel to rotate inside the submerged entry nozzle by electromagnetic force, thereby controlling the flow field. This research shows that it can reduce the impact of molten steel on the bottom of nozzle and partly reduce the negative pressure at the upper part of nozzle outlet which is even eliminated by optimizing the structure and angle of nozzle. The area of heat flux of the mold wall becomes larger, and the crest value of heat flux gets lower than that without swirling in nozzle and any nozzle optimization. The meniscus fluctuates smoothly, and the flow velocity at the top surface is within a reasonable range. The temperature field distribution in the mold is uniform which was beneficial to the growth of equiaxed crystal and decreased element segregation.