摆辗机力能参数研究

介绍了摆动辗压工艺原理及基本特征。通过对摆辗力的实测实验找出摆辗力的分布规律。并根据此实验分析摆动辗压变形的两个阶段及摆辗力的分布特征，为今后摆辗机的理沦研究和结构设计提供依据。     

钽合金零件的摆辗成形工艺

钽合金具有高密度、耐高温、强度高和良好的加工性能、断裂韧性、耐蚀性等优点,是航空、航天、化工、核工业、高温技术等领域不可缺少的重要材料,具有很好的应用前景.研究了摆辗成形钽合金零件的方法,讨论了摆角、摆辗时间等参数对摆辗成形的影响,分析了摆辗成形时出现壁厚尺寸偏差和折叠缺陷的原因,同时也提出了相应的解决措施.     

摆辗变形参数的测量原理及摩擦系数的测定

摆动辗压过程中,工件作用在模具上力参数的大小,随着工艺参数,如工件的初始高径比,每转进给量、润滑状态的不同而异.为深入研究摆辗变形的规律,就须对该力参数的变化进行测量.本文主要叙述了其测量原理,并设计了实验装置,对摆辗过程中的工件与模具间的摩擦系数进行了初步测量,结果表明,对圆柱形铅试件摆辗变形,采用机油润滑时摩擦系数约为0.084;采用硅油石墨润滑时.摩擦系数约为0.031;无润滑剂时,摩擦系数约为0.355～0.397.     

摆辗机成形工件最佳半径的理论分析

摆动辗压成形是一种新的压力加工工艺，采用该工艺十分省力。通过理论分析，得出摆辗机所适宜加工成形零件的半径范围，对摆辗机的设计和应用起到一定的指导作用。     

摆动辗压机在摆动辗压过程中摆头上任一点的速度分析

详细分析了在有限转装置和无限转装置两种情况下，摆动辗压过程中摆头上任一点的速度情况，并给出了理论公式和分布曲线图，为进一步研究摆辗变形的速度场问题提供了必要的理论基础。     

汽车后桥半轴辗压设备问世

第一重型机器厂为第二汽车制造厂研制的“东风”汽车后桥半轴辗压设备负荷试车成功。 这台设备由200t卧式摆辗机和200t卧式镦锻机及液压系统组成。其应用范围广,可加工汽车半轴、拖拉机零件、齿轮毛坯、长杆件镦粗及带有法兰盘的工件等。这台设备具有体积小、重量轻、效     

大型立辊轧机辗边行为模拟

本文应用刚－粘塑性有限元法成功地模拟了Ａｌ５０５６和铅两种材料的辗边过程，着重分析了工艺参数对辗边力能参数的影响，得出一些重要结论。计算结果与试验结果吻合较好。     

Assel轧机轧制薄壁管壁厚螺旋性不均研究

针对Assel轧管机轧制薄壁管时出现内螺纹缺陷问题,采用三维有限元分析软件Simufact,对X20Cr13钢管典型规格160mm×6.5mm Assel斜轧过程进行数值模拟。研究了不同芯棒运动方式、送进角及轧辊辗轧带线型对斜轧后荒管内螺纹深度的影响。结果表明:全浮动芯棒轧后荒管所产生的内螺纹深度最小,固定芯棒次之,拉力芯棒最差;随着送进角逐渐增大,轧后荒管的内螺纹深度逐渐加深;双曲线型辗轧带更有利于控制轧后荒管的内螺纹深度,双曲线辗轧带条件下,轧件在轧制过程中所产生的扭转变形量要较直线型辗轧带小大约35%。     

锥辊辗轧理论研究的进展

锥辊辗轧理论的研究开拓了带材轧制和随后深加工的新领域。它利用楔形轧制和异步轧制的若干特点，以构成一个新的轧制过程，提供了高效，低耗和柔性加工钢带和螺旋叶片的可能性和现实性。本文对钢带锥辊异步冷辗轧，螺旋叶片锥辊冷辗轧等程的理论研究作一较详细的阐述。以推进这方面的研究。     

芯棒辗轧机在CPE机组中的应用及布置

对芯棒辗轧机在CPE机组中的使用状况与结构形式进行了介绍,针对芯棒辗轧机的两种布置方式展开分析,在线布置在芯棒循环区域内可灵活生产,须与顶管节奏匹配,整机重量与功率较大,设备投资较多,但可直接利用余热进行辗轧;离线布置在芯棒循环区域外则可简化辅助设备,生产管理简单,芯棒辗轧时需再加热。建议新建机组因地制宜,综合考虑芯棒辗轧机的布置。     

粉冶结构零件摆动杆的压模设计

详细介绍了粉末冶金摆动杆的压制模具结构。     

Swinging: a review of the literature

No review of the topic of swinging has been done in the last 20 years. This review is intended to update the literature. Studies estimating the incidence of swinging, the demographic and personality characteristics of swingers, along with how swingers are perceived by nonswingers are reviewed. Numerous theories explaining this behavior have been presented with a social psychological model being the primary focus here. Major reasons for getting involved in swinging, initiation into the lifestyle, effects on marriage, and dropping out of swinging are also covered. Finally, the literature dealing with some of the major problems with swinging, focusing on AIDS, are also discussed, along with the current state of swinging and suggestions for future research.     

万向接轴速度波动的分析

重型机械中，尤其冶金设备领域，万向接轴在传动系统中的应用非常广泛。但生产中常常出现万向接轴输出轴端转速波动现象，结果是破坏了设备的同步条件，引起了打滑、附加载荷和由打滑诱发的自激振动与噪声，不仅恶化了工作条件，甚至导致设备事故。本文分析了万向接轴输出轴端速度波动的原因和计算方法，并提出防止这种现象的措施。     

链箅机布料系统的均匀布料

 根据链箅机-回转窑球团采用成品生球带式输送机+摆动皮带+宽皮带+辊式布料器+溜料板组成的布料系统,介绍其布料原理。实际生产中,链箅机布料存在布料不均、影响箅板使用寿命等问题,分析摆动皮带、宽皮带、辊式布料器、溜料板引起布料不均的原因。对均匀布料进行研究,实现布料设备紧凑组合、降低工程投资。阐述摆动皮带的工作原理,得出摆动皮带的摆动结构自身不对称是造成链箅机箅床左右料层不均的根本原因。针对摆动皮带自身结构引起的布料不对称问题展开算法研究,设计合理的摆动皮带运行轨迹。正确选择溜料板的合理角度和分离点,实现均匀布料。     

攀钢四号高炉出铁场摆动流槽设计介绍

针对攀钢四号高炉出铁场增加摆动流槽设计需满足带高温铁水运行、左右摆动出铁等工艺要求对摆动流槽进行设计,采用曲柄-摇杆机构驱动的方式,满足了摆动流槽的工艺要求。     

安钢炉卷精整线设备选型分析

介绍安钢炉卷生产线精整工艺设备布置,通过比较摆式飞剪和滚切式横剪的结构特点,说明安钢炉卷生产线选用摆式飞剪的原因及产生的社会效益和经济效益.     

Spatial Vibration and Its Numerical Analytical Method of Four-high Rolling Mills

The rolls in contemporary four-high mills cannot be maintained parallel during the rolling process. There- fore, four-high rolling mill vibrations take place in six degree of freedom （DOF） leading to spatial behaviors invol- ving vertical, horizontal, axial, torsional, cross and swinging vibration modes resulting in complex relative motions between the rolls. Two numerical methods, modified Riccati-transfer matrix method （Riccati-TMM） and finite ele- ment method （FEM）, are presented to analyze a spatial vibration characteristic of two four-high rolling mills with different stability. The natural frequency and mode shape of four-high rolling mills are obtained, and the clearance has a great effect on natural frequency and mode shape. In addition, field testing experiment is also conducted to measure natural frequency by power spectrum analysis of rolling mill vibration. Experimental results basically agree with those calculated by Riccati-TMM and FEM, which means that the Riccati-TMM and the FEM can be used for analysis of spatial vibration of four-high rolling mill. Meanwhile, the spatial vibration shows more compound vibra- tion behaviors and the negative effect of horizontal, vertical, cross and swinging vibration modes are effectively con- trolled after redesign of rolling mill. These advantages have a great significance for the rolling mill to be operated with a much higher rolling speed and improved yield of products.     

钢包回转台称重系统改造

采用在升降液压缸底部安装传感器的间接称量法对济钢第一炼铁厂连铸机大包回转台的称重系统进行改造 ,同时对系统实行可靠的冷却防护和信号传输。改造后的称重系统提高了耐高温、抗冲击、防钢水飞溅能力 ,而且现场适应性好 ,性能稳定 ,维护方便     

Localization of knee joint cartilage pathology by multichannel vibroarthrography

This paper proposes non-invasive techniques to localize sound or vibroarthrographic (VAG) signal sources in human knee joints. VAG signals from normal subjects, patients who subsequently underwent arthroscopy, and cadavers with arthroscopically-created lesions, obtained by stimulation with a finger tap over the mid-patella and swinging movement of the leg, were analyzed for time delays using cross-correlation functions for source localization. Correct results were obtained for 13 of the 14 subjects tested by finger stimulation, and for 11 of the 12 subjects whose VAG signals during swinging movement were analyzed. The techniques could be valuable in the diagnosis and treatment of knee pathology before and after joint surgery or drug therapy.     

用SOLIDWORKS对复摆颚式破碎机进行三维模型图设计

运用Solidworks2001软件建立了复摆颚式破碎机的三维实体模型，提出了三维模型建模的基本思路和方法。