济钢中厚板厂3000T热矫直机辊缝调整系统研究

通过分析3000T热矫直机辊缝调整装置，系统研究了3000T热矫直机辊缝调整功能的实现，为矫直机的在线使用提供了重要的参考依据。     

中厚板十一辊热矫直机应用与研究

中厚板在生产的各个过程中会产生各种浪型缺陷,为了保证钢板的平直度,唐钢中厚板轧机加速冷却装置后设置了一台热矫直机,用于轧后及加速冷却后钢板的矫直。主要介绍了热矫直机的控制方式和控制特性,并对其中重要的控制功能进行了详述。通过对矫直机的控制,提高了钢板的平直度,满足了市场和用户对钢板的质量要求。     

六辊矫直机噪声治理

六辊矫直机噪声治理何文趱，司志强，王滨之，李建伟，许新灵（杭州钢铁集团公司杭州钢铁集团公司安环处杭州钢铁集团公司无缝钢管厂）钢管厂矫直机扣瓦是（冷拨）无缝管进行矫直加工的重要设备之一。矫直机将无缝钢管限制在扣瓦内，以防止未被矫直部分钢管由于受矫直辊作...     

浅谈H型钢低速大压力矫直机的研究与应用

莱钢大H型钢所用的矫直设备为辊式矫直机和压力矫直机,压力矫直机为辅助矫直设备。在生产过程中,主要是使用辊式矫直机进行矫直。就矫直机在H型钢轧线上的研究与应用。     

九辊中厚板热矫直机故障分析及解决方案

根据河北钢铁集团舞钢公司九辊中厚板热矫直机应用现状,重点分析了我厂热矫机经常出现的故障,最后经过对故障了分析,改进设备不完善方面,很好的解决了问题。     

现阶段我国中厚板轧机主要设备现状

本文分析了我国中厚板轧机主要设备：四辊轧机、热矫直机蒗切式双边剪、滚切式定尺剪设计制造技术、使用状况及改造建议。     

新型多辊矫直技术在高强平整机上的应用

文章分析了传统平整技术的不足,介绍了一种新型多辊矫直平整技术。重点对多辊矫直机的处理能力与控制策略进行了详细说明。新型多辊矫直平整技术应用于2250热轧高强平整机组,现场实绩表明对高强薄规格板形的改善效果十分明显。     

1200辊式矫直机主传动减速机箱体的设计与改进

辊式矫直机主减速机是矫直机的重要组成部分，其主要作用是把主电动机的高转速转变成矫直辊所需要的低转速，避免采用成本较高的电动机，同时还起到传动分流的作用。本文通过对主减速机的结构和制造工艺进行改进，对提高主减速机的寿命，具有非常重大的意义。     

浅谈中厚板矫直机原理及参数计算

近几年来,随着控轧控冷与直接淬火的采用,轧后板温降低、板形变坏、屈服强度增大,板厚范围加宽和用户对钢板加工自动化程度的提高,要求生产厂交货钢板的平直度也更加严格。本文介绍中厚板热矫直机的结构特点和功能。并对矫直原理做了详细具体的阐述,对其主要零部件做了校核,对矫直机的力能参数做了计算。     

矫直在H型钢生产线上的应用

随着钢铁行业的日益竞争,提高产品质量是企业竞争的首要任务,所以为了更好地消除在轧制、冷却、运输过程中产生的一些形状缺陷,如侧弯、上下弯、翼缘内并外张、瓢曲和扭转等缺陷。满足国家标准及用户的要求,大部分轧件需要进行矫直。根据矫直机的结构特点,矫直机可分为：压力矫直机、辊式矫直机、管棒材矫直机、张力矫直机、拉伸弯曲矫直机、五种型式。莱钢大H型钢生产线主要采用cRS辊式矫直和压力矫直进行补矫。     

Effect of heat input on cryogenic toughness of 316LN austenitic stainless steel NG-MAG welding joints with large thickness

In this paper, Narrow Gap Metal Active Gas (NG-MAG) arc welding system was introduced, aiming at efficiently jointing AISI 316LN thick plate used in International Thermonuclear Experimental Reactor (ITER) device. Effect of heat input on cryogenic impact toughness of the WM was investigated and suitable welding parameters were explored to optimize the cryogenic toughness of weld metal (WM) and avoid weld defects simultaneously. Impressively, the maximum low temperature toughness of the NG-MAG arc welded WM could reach more than 100 J, which could be comparable with that of the Tungsten Inert Gas (TIG) arc welded WM. More importantly, the NG-MAG arc welding showed much higher efficiency than the counterpart TIG. The less compositional segregation, and smaller dendrite size due to the lower level of heat input in NG-MAG arc welding were believed to play the critical role in enhancing the cryogenic toughness.     

Analysis of plates and shells using an edge-based smoothed finite element method

In this paper, an approach to the analysis of arbitrary thin to moderately thick plates and shells by the edge-based smoothed finite element method (ES-FEM) is presented. The formulation is based on the first order shear deformation theory, and Discrete Shear Gap (DSG) method is employed to mitigate the shear locking. Triangular meshes are used as they can be generated automatically for complicated geometries. The discretized system equations are obtained using the smoothed Galerkin weak form, and the numerical integration is applied based on the edge-based smoothing domains. The smoothing operation can provide a much needed softening effect to the FEM model to reduce the well-known “overly stiff” behavior caused by the fully compatible implementation of the displacement approach based on the Galerkin weakform, and hence improve significantly the solution accuracy. A number of benchmark problems have been studied and the results confirm that the present method can provide accurate results for both plate and shell using triangular mesh.     

自动控制技术在环缝洗涤系统中的应用

自动控制技术在环缝洗涤系统中的应用，简要介绍了高炉环缝煤气洗涤的工艺、控制原理。     

聚能效应在机场地下未爆弹排除中的应用

介绍了机场地下未爆弹隧进殉爆系统。通过研究地下未爆弹状态特征和性能结构参数,根据聚能效应设计了爆炸成型弹丸(EFP)战斗部,并论证了其殉爆机场地下未爆弹的可行性,实弹殉爆试验效果良好。     

聚能效应在机场地下未爆弹排除中的应用

介绍了机场地下未爆弹隧进殉爆系统。通过研究地下未爆弹状态特征和性能结构参数,根据聚能效应设计了爆炸成型弹丸(EFP)战斗部,并论证了其殉爆机场地下未爆弹的可行性,实弹殉爆试验效果良好。     

船舶推进轴系动态负荷测量方法研究

船舶推进轴系在运转中承受着复杂的负荷和应力,良好的承载状态对船舶长期安全航行具有重要意义。本文设计了一种基于应变片的无线遥测系统,可以实现不同对中状态下的轴系动态负荷测量。根据不同截面测得的应变数据结合建立的单支点负荷计算模型,可求得各轴承的实际负荷。在搭建的轴系缩比试验台上测得的负荷值与通过有限元模型仿真求得的负荷值相差不大,证明了该测试方法的可靠性。     

Modelling of foam degradation in lost foam casting process

In this investigation a new model was developed to calculate gas pressure at the melt/foam interface (Gap) resulting from foam degradation during mould filling in the lost foam casting (LFC) process. Different aspects of the process, such as foam degradation, gas elimination, transient mass, heat transfer, and permeability of the refractory coating were incorporated into this model. A computational fluid dynamic (CFD) code was developed based on the numerical technique of the SOLution Algorithm-Volume of Fluid (SOLA-VOF) utilizing model, for the simulation and prediction of the fluid flow in the LFC process. In order to verify the computational results of the simulation, a thin plate of grey iron was poured into a transparent foam mould. The mould filling process was recorded using a 16 mm high-speed camera. Images were analysed frame by frame, in order to measuring foam depolymerization rate and the gap volume during mould filling. Comparison between the experimental method and the simulation results, for the LFC filling sequence, has shown a good agreement.     

Electromagnetic Devices Applications of EBG for Systems Communications

This paper presents the study and applications of EBG (Electromagnetic Band Gap)/PBG (Photonic Band Gap) substrates, of planar microstrip structures, including quadrature directional couplers, rat-race (ring coupler) and impedance transformers. Through specific programs developed in FORTRAN PowerStation, the frequencies and couplings for each structure are obtained. Also are used the PACMO—Computer Aided Design in Microwave program developed by H.C.C. Fernandes. Results of the dimensions and coupling of these devices, varying the frequency band (cellular communication and Wimax systems) and permittivity of the substrate, are obtained, comparing the results of conventional materials with EBG/PBG materials in the s and p polarizations.     

Phase plate to extend the depth of field of incoherent hybrid imaging systems

A hybrid imaging system combines a modified optical imaging system and a digital postprocessing step. We describe a spatial-domain method for designing a pupil phase plate to extend the depth of field of an incoherent hybrid imaging system with a rectangular aperture. We use this method to obtain a pupil phase plate to extend the depth of field, which we refer to as a logarithmic phase plate. Introducing a logarithmic phase plate at the exit pupil of a simulated diffraction-limited system and digitally processing the detector's output extend the depth of field by an order of magnitude more than the Hopkins defocus criterion. We also examine the effect of using a charge-coupled device optical detector, instead of an ideal optical detector, on the extension of the depth of field. Finally, we compare the performance of the logarithmic phase plate with that of a cubic phase plate in extending the depth of field of a hybrid imaging system with a rectangular aperture.     

大景深光学成像系统关键技术的研究

在普通光学成像系统中引入相位模板和数字图像复原技术，可以增大系统的景深。本文设计了一种新的由多个等面积环形区域组成的纯相位模板，相邻的环形分区交替补偿高斯物面两侧离焦。同时，基于频域滤波理论和MTF离焦不变性质，给出了相应的不依赖于离焦程度的图像复原滤波器的表达式。系统的MTF曲线、MTF密度图和Spoke图结果表明系统具有大景深特性。通过适当调整模板参量，系统景深可以达到普通光学系统的4倍以上。系统可以应用到生物和医学的显微成像、机器视觉等多个领域。