2005年度编辑推荐产品

哈挺(中国)有限公司哈挺QUEST8/51车削中心哈挺Kel-VivaCNC万能外圆磨床BridgeportVMC760XP3哈挺桥堡立式加工中心BridgeportHSC500VMC哈挺桥堡高速加工中心瑞士威力铭-马科黛尔公司W-518MT五轴棒料加工中心带铣/车功能W-528S五轴镗铣加工中心小巨人机床有限公司Q T N系列数控车床V C N立式加工中心北京机电院高技术股份有限公司五轴联动立式加工中心系列龙门式五面加工中心系列斯来福临中国MFP50强力磨削中心哈斯自动数控机械(上海)有限公司哈斯立式加工中心(VMC)产品系列西班牙尼古拉斯·克雷亚公司PANTERA五坐标桥式…     

2007年度编辑推荐产品

排名不分先后瑞士威力铭一马科黛尔公司W一51绍五轴加工中心W一508MT仲料加工中心哈挺(中国)有限公司SR CNC机床XR7印机床北京机电院高技术股份有限公司XKH系列五轴联动叶片加工中心ANCA公司RX7帆床瑞士宝美技术(B U MOTEC)有限公司上海技术展示中心S一Jg ILINEAR新一代高精密型铣车复合中心宁江机床集团股份有限公司TH(M沁380精密卧式加工中心北京阿奇夏米尔技术服务有限责任公司C人20浸水式高精度数控线切创放电加工机SA 31准控精密电火花成形机床苏州中特机电科技有限公司八轴数控电火花高速小孔加工专机苏州三光科技有…     

七轴超精密铣-车复合加工中心RM3-7 Axes

RM3-7 Axes七轴高速超精密铣-车复合加工中心,是SPINNER-REALMECA最新推出的高端产品,适用于航空、航天、医疗器械、生物医学,微精机械、电子通信、汽配制造、光学零件等高技术领域的精细复杂加工.     

铣车复合加工技术在薄壁机匣加工中的应用

通过铣车复合加工技术在航空薄壁机匣加工中的应用,更进一步认识到铣车复合加工中心设备功能的重要性,掌握了在线测量自动找正、铣车复合自动换刀加工、铣车复合虚拟仿真加工等加工技术,形成了整体环形薄壁机匣铣车复合加工典型工艺路线。采用铣车复合加工技术进行工艺改进,充分地发挥机床的功能,缩短了工艺路线,采用在线测量、车铣复合、虚拟仿真等加工技术,保证了加工过程的可靠性,能够大幅提高加工效率、降低加工成本,保证加工质量。     

超精密加工中心与其三维空间误差校准

切削的高精度与机床误差的准确的校准息息相关。在2007年的EMO国际机床展上瑞士威力铭-马科黛尔公司向公众展示了对超精密坐标镗(JIG BORING)进行空间误差校准的一种新方法。机器的校准与其高精度息息相关。以射击为例,校准机床可以简单地概括为类似于对射击靶子的中心的校准。重复精度取决于机器的几何精度的质量。威力铭-马科黛尔公司拥有的设计和制造加工中心的技术诀窍和经验是     

车铣复合加工技术--高速、高效、高质、高柔性

奥地利林茨机床公司(WFL)将多种航空零件组合成一个演示工件,来显现该公司车铣复合加工中心实现高速加工的理念     

基于VERICUT的车铣复合加工中心虚拟仿真研究

针对多轴联动车铣复合加工中心运动关系复杂、加工准备时间长、干涉碰撞易发生的特点,本课题在研究机床结构特征的基础上,构建了基于VERICUT的车铣复合加工中心虚拟加工环境,重点研究了虚拟机床的建模方法,包括几何模型,运动模型和控制系统模型的定制,特别是专用数控指令的定制方法,实现了零件数控加工前的仿真校验。     

代表最新加工技术的DMG机床——DMG CIMES2012展品预览

第11届中国国际机床工具展览会(CIMES)期间,DMG将为观众呈现10余款代表最新加工技术的机床,包括四轴车铣复合加工中心、五轴万能加工中心、铣车复合加工中心、高效钻铣加工中心、卧式加工中心以及全新设计的ECOLINE万能车床、万能铣床和立式铣削加工中心(展位号:W1馆,B001)。     

第十一届中国国际模具技术和设备展览会

瑞士宝美技术(BUMOTEC)有限公司展位号:B029S-192FT是一台五轴联动铣加工中心,可与双主轴车床在性能上紧密、完美融合成非常先进的七轴五联动铣车复合中心,为高精密、高品质、高复杂性小型零件加工提供了最佳方案,一次装夹可完成工件多侧面的五轴铣、车复合加工。整体铸铁床身,     

复合加工技术在航空复杂零件加工中的应用

复合加工技术在航空发动机制造领域广泛应用,解决了复杂结构零件、难加工材料加工难题,如:采用振动钻孔、振动攻丝解决了细长孔加工难题,采用振动光饰解决叶片表面抛光难题;采用镗铣、车铣复合多功能加工中心实现了多工序集中复合加工,减少了工序周转和辅助加工时间,减少了人为干预,提高了自动化加工水平,为加工过程全程序化控制奠定了基础,保证了零件加工质量的稳定性和可靠性。     

ICP-AES法测定纯铜中的Bi,Sb,As,Fe,Ni,Pb,Sn,Zn,Ag的方法

研究了ICP-AES法测定纯铜中的Bi,Sb,As,Fe,Ni,Pb,Sn,Zn和Ag等9个元素的分析方法.进行了基体元素铜对9个分析元素的光谱干扰研究,选择了合适的分析谱线,同时测定了分析方法的检出限.     

Triton, Pluto, Centaurs, and Trans-Neptunian Bodies

The diverse populations of icy bodies of the outer Solar System (OSS) give critical information on the composition and structure of the solar nebula and the early phases of planet formation. The two principal repositories of icy bodies are the Kuiper belt or disk, and the Oort Cloud, both of which are the source regions of the comets. Nearly 1000 individual Kuiper belt objects have been discovered; their dynamical distribution is a clue to the early outward migration and gravitational scattering power of Neptune. Pluto is perhaps the largest Kuiper belt object. Pluto is distinguished by its large satellite, a variable atmosphere, and a surface composed of several ices and probable organic solid materials that give it color. Triton is probably a former member of the Kuiper belt population, suggested by its retrograde orbit as a satellite of Neptune. Like Pluto, Triton has a variable atmosphere, compositionally diverse icy surface, and an organic atmospheric haze. Centaur objects appear to come from the Kuiper belt and occupy temporary orbits in the planetary zone; the compositional similarity of one well studied Centaur (5145 Pholus) to comets is notable. New discoveries continue apace, as observational surveys reveal new objects and refined observing techniques yield more physical information about specific bodies.     

加快维修周转时间

大到整个飞机机身,小到某个飞机附件,周转时间都是十分重要的。在成本、质量和速度的三角关系中,后者正在占据越来越重要的地位。现在航空业出现一种新趋势,即航空公司在寻找维修公司时更注重维修周转时间的长短,以前,却是更为注重维修价格的高低。随着飞机营运费用的升高,周转     

维修数据传输:更快速、更廉价、更好

一直以来,航空公司大多采用ACARS通信系统(飞机通信寻址和报告系统)进行空中通信服务.但与陆地通信系统相比,该系统的传输速度慢而且成本高,成为目前影响飞行数据传输速度的重要因素之一.一些MRO软件供应商已开始开发机载无线通信系统,试图改善以往缓慢、昂贵和复杂的空中无线服务,使飞行中生成的重要维修数据以更低的成本、更快的速度和更高效率实现传输.     

A survey of the outer planets Jupiter,Saturn, Uranus,Neptune, Pluto,and their satellites

A survey of current knowledge about Jupiter, Saturn, Uranus, Neptune, Pluto, and their satellites is presented. The best available numerical values are given for physical parameters, including orbital and body properties, atmospheric composition and structure, and photometric parameters. The more acceptable current theories of these bodies are outlined with thorough referencing offering access to the details. The survey attempts to cover the literature through May 1, 1972. Prepared Under Contract No. NAS7-100 National Aeronautics and Space Administration.     

Ion engine grids: Function,main parameters,issues, configurations,geometries, materials and fabrication methods

Ion optics are crucial components of ion thrusters and the study of the different ion extraction solutions used since the beginning of the electric propulsion era is essential to understand the evolution of ion engines. This work describes ion engine grids' main functions, parameters and issues related to thermal expansion and sputter erosion, and then introduces a review of ion optics used for significant launched and tested ion thrusters since 1970. Configurations, geometries, materials and fabrication methods are analyzed to understand when typical ion thrusters use two or three grids, what are the thicknesses and aperture sizes of the screen, accelerator and decelerator grids, why molybdenum and carbon-based materials such as pyrolytic graphite and carbon–carbon are the best available options for ion optics and what is the manufacturing method for each material.     

CIR Morphology, Turbulence, Discontinuities, and Energetic Particles

Corotating interaction regions (CIRs) in the middle heliosphere have distinct morphological features and associated patterns of turbulence and energetic particles. This report summarizes current understanding of those features and patterns, discusses how they can vary from case to case and with distance from the Sun and possible causes of those variations, presents an analytical model of the morphological features found in earlier qualitative models and numerical simulations, and identifies aspects of the features and patterns that have yet to be resolved. This revised version was published online in August 2006 with corrections to the Cover Date.     

Collapse,equilibrium, and fragmentation of rotating,adiabatic clouds

Numerical calculations of the collapse of adiabatic clouds from uniform density and rotation initial conditions show that when restricted to axisymmetry, the clouds form either near-equilibrium spheroids or rings. Rings form in the collapse of low thermal energy clouds and have = T/ ¦W¦ 0.43. When the axisymmetric constraint is removed and an initial m=2 density variation is introduced, clouds either collapse to form near-equilibrium ellipsoids or else fragment into binary systems through a bar phase. Ellipsoids form in the collapse of high thermal energy clouds and have 3 0.27. The results are consistent with the critical values of for instabilities in Maclaurin spheroids, and suggest that protostellar clouds may undergo a dynamic fragmentation in the nonisothermal collapse regime.National Academy of Sciences — National Research Council Resident Research Associate.