全伺服人造草坪机控制系统的研发（英文）

提出了一种全伺服人造草坪机控制系统的总体设计方案,实现了机器安全平稳地工作。该人造草坪机采用伺服电机代替以往常使用的步进电机和异步电机。在该控制系统中,运动控制器LMC20通过CANopen总线与变频器ATV71,OTB模块,伺服电机,检测模块等其它设备实现通信。通过CoDeSys软件的开发,具有人性化操作界面的触摸屏可实现信号采集、工作状态显示、控制、保护等功能。该系统已在工厂中投入使用。     

基于DSP平台的排爆机械臂控制系统设计

针对具有危险的特种环境,设计一个可以代替人工作业的排爆机器人控制系统。该系统以DSP为中央处理核心,用6个伺服电机配合铝制合金搭建机械臂硬件结构,利用DSP增强型PWM模块驱动伺服电机,上位机采用PC机进行控制。实现了串口测试软件向SCI模块发送指令的功能,从而控制机械臂,仿生模仿人手的各类运动。实验结果表明:控制系统精度高,调节快,该机械臂有强的承重能力,能准确握紧危险品并放于隔离箱中。     

基于PLC与伺服液压的装胎机控制系统设计

设计了装胎机控制系统,该系统为电液闭环控制系统,以PLC为控制核心,结合变频器、伺服电机、位移传感器等,完成了轮胎的高效运送和精确定位,实现了自动组胎功能。     

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.     

卧式数控车床上下料三轴机械手的控制系统设计

针对上下料机械手运动频繁且可靠性要求高的特点,设计了基于三菱PLC的卧式数控车床上下料机械手的电气控制系统硬件和软件。硬件系统包括主控制器、触摸屏、伺服系统、电源系统等,软件系统包括运动控制模块、通讯模块、故障检测模块。为了实现机械手工作状态的在线监测,在实时采集机械手伺服电机编码器位置反馈信号的基础上,提出了基于统计过程监控理论的机械手早期故障检测方法。该卧式数控车床上下料三轴机械手的控制系统,具有机械手早期故障检测功能,可提高机械手的工作可靠性。     

旋转式飞剪机伺服电机功率计算探讨

在飞剪控制系统中,飞剪机伺服电机作为机械和电气的接口,将电能变换成机械能,在整个系统中起到重要的作用.伺服电机的功率计算和选择是飞剪机的技术核心之一,本文介绍了飞剪机伺服电机的功率计算方法.     

火箭箱底数字射线检测系统设计

运载火箭贮箱箱底/筒段焊缝数字射线检测目前主要通过传统基于人工的射线照相，存在检测效率低、主观经验依赖性强、质量稳定性差等问题。为了实现运载火箭贮箱箱底/筒段焊缝数字射线高效检测，满足常态化高强密度发射形势下其快速、批量研制需求，研发一种基于双机器人协同的运载火箭贮箱箱底/筒段焊缝数字射线检测控制系统。该控制系统主要完成双机器人的协同运动、远程控制启动、伺服电机驱动、自动定位，并在上位机实现数据通信等功能。实验结果表明：所开发的数字检测控制系统可兼容多种型号箱底与筒段检测，检测效率高、精度高。     

闸式剪板机控制系统开发

此套控制系统以汇川H2U系列PLC为基础,通过MODBUS通讯协议实现对后挡料伺服电机的定位控制,同时通过扩展模块采集剪切角度、刀口间隙的模拟量信号,辅以汇川InoTouch触摸屏实现机床控制和数据的实时显示.采用伺服电机驱动齿轮泵取代普通电机与定量泵配置,在降低能耗的同时,使得油温也得到了很好的控制,噪声大大降低.     

基于ANSYS Workbench的人造草坪织机连杆的有限元分析及优化设计

人造草坪机的连杆是使机构中的簇针、成圈钩、割刀完成各自往复运动的重要连接部件。利用了ANSYS Workbench有限元分析软件对人造草坪机连杆建立了有限元模型。根据其在实际中的受约束以及载荷情况,进行静力分析。考虑到机床运转时振动对连杆的影响,对其进行模态分析。根据静力学分析的结果对连杆进行拓扑优化设计,为连杆以及人造草坪机的其他部件的进一步优化提供了理论依据及实现方法。     

基于工控机的多工位电动螺栓拧紧机控制系统的研制

介绍了研制的多工位电动螺栓拧紧机，利用气动实现其多工位选择，动力采用交流伺服电机，经三级减速装置减速增矩后带动板手头，硬件采用左华工控机及各类接口板卡，软件用VB编写，控制系统采用闭环控制。该辅机减少了工人劳动强度，提高了生产效率，实现了螺栓扭矩和转角高精度控制以及拧紧机的智能化，网络化。     

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.     

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.     

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.     

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.