机械手在注塑生产中的应用

介绍了在注塑机中采用的机械手的组成结构及各部分的设计要点，分析了注塑用机械手的发展趋势。     

PLC在气动机械手控制系统中的应用

从机械手结构、动作过程、气压驱动设计、PLC控制系统设计等几个方面介绍一种气动机械手的设计过程。该机械手能在回转半径范围空间内实现对一定重量的物体的抓举,性能稳定、具有很强的扩展性,能满足科技创新设计的需要。     

具有L2增益的陶瓷取坯机械手鲁棒跟踪控制

本文对具有不确定和干扰的二自由度电动陶瓷取坯机械手系统动态模型 ,采用李雅普诺夫函数递推设计方法设计了鲁棒跟踪控制器。所设计的控制器不仅保证跟踪误差系统的稳定性而且使得由力矩干扰到跟踪误差评价信号的L2 增益小于给定的值。同时本文也给出了不用解HJI不等式设计陶瓷取坯机械手H∞ 控制器方法 ,仿真结果表明所设计的控制器具有良好的跟踪性能和较强的鲁棒性     

适用于玻璃器皿压制生产线的钳杯机械手设计与研究

介绍了一种新型钳杯机械手的设计和研究过程,该机械手结构合理,特别适用于玻璃器皿的钳取。     

一种新型钳杯机械手的研究

作者研究和设计了一种新型钳杯机械手。该设计考虑到玻璃制品移动前的定位，该机械手适用于大型玻璃制品。     

捣固焦炉窨井式炉盖开闭机械手的开发

介绍了捣固焦炉水封式炉盖和窨井式炉盖的特点,从机械结构、液压系统、电控系统三个方面,详细介绍了窨井式炉盖开闭机械手的开发及设计要点,分析了机械手的运动功能、控制要求、安全保护等关键问题,提出了一套完整的解决方案。通过采用窨井式炉盖开闭机械手,可以全自动完成窨井式炉盖的开闭工作,减轻工人的劳动强度,并大大减少烟尘排放。     

高性能的创新型机械手

S5-15小型机械手 S5-15机械手是Sepro公司先进的笛卡儿横梁机械手S5产品线中的最小型号，它在Fakuma2011展会中首次亮相。S5-15机械手为实现锁模力30～180t的注塑机自动化而设计，它是Sepro公司针对复杂的自动化应用所开发的第五代高性能机械手中的终极型号。     

环形电镀生产线机械手过渡的实现

根据环形电镀生产线的特点,介绍了机械手的应用;并详细介绍了二自由度平移机械手和二自由度摆动机械手的结构模型和运动过程,为环形电镀生产线的设计提供了新的方法.     

摇臂式电镀取料机械手的结构设计

根据环形电镀线的特点,介绍了摇臂式电镀取料机械手的基本运动和基本结构,并详细说明了其直线运动、旋转运动和抓手的设计,为摇臂式电镀取料机械手的设计提供借鉴。     

纽威机械手码垛机在硫磺包装线上的应用

目前某厂硫磺包装线采用纽威的机械手码垛机,生产效率远高于以前采用的纽威的低位码垛机,本文详细阐述了机械手码垛机与低位码垛机的主要组成构件和工作过程,并结合在硫磺包装线上的实际使用情况,对二者进行比较,总结出机械手码垛机的优越性.最后总结出机械手码垛机在实际应用中出现的常见故障及处理方法.     

EFFECT OF MOLTEN ALUMINUM ON VARIOUS REFRACTORY BRICK*

To study the effect of molten aluminum on refractory brick with a view toward explaining some of the brick failures in aluminum melting furnaces, the following test was conducted. Brick of different compositions and from various manufacturers were placed on end in the bottom of an electrically heated ladle to which molten aluminum was added. After holding the molten aluminum in contact with the brick for thirty-five days, it was poured out and the ladle was allowed to cool slowly to room temperature. A study of the brick revealed that some failed by penetration of the aluminum into the brick accompanied by a reaction between the aluminum and the brick. This penetration was less with the denser brick than with the more porous ones. Of the brick tested, there was the least reaction between aluminum and the chrome brick and most between aluminum and silica brick. Many other factors, however, must be considered when deciding which brick is the most economical to use in aluminum melting.     

A STUDY OF HEATING AND COOLING RATES OF CHECKER BRICK*

A test simulating the heat absorption and emission of checker brick was developed. The results of such tests on fire brick of two sizes, made by three different processes and procured from four fireclay districts, are given and correlated with the bulk specific gravity and porosity of the brick.     

SPLITTING OF SOFT-MUD BRICK*

A study was made of the cause and methods of preventing the splitting of Hudson River soft-mud brick. The splitting occurred in the kiln and paralleled the 8- by 4-in face of the brick and was found to be associated with black coring. Tests made on various portions of the brick showed that the black portions were more vitreous and had lower thermal expansions than the outer, more oxidized portions. On cooling, the stresses resulting from the difference in thermal expansion were such as to tend to split the brick Modification of brick mixes and method of setting are recommended to overcome black coring.     

成型方式对石英砂烧结砖性能的影响研究

利用低品位石英砂制备高性能石英砂烧结砖,通过对原料和砖体物相分析、砖体的显微结构分析以及砖体的物理性能分析,研究了成型方式对砖体性能的影响。结果表明:等静压成型的压力比手压成型的大得多,使得坯体内部气孔数量少且孔径小,有利烧结。等静压成型所制备的砖体抗压强度(34.8MPa)比可塑(手压)成型的砖体抗压强度(19.5MPa)高得多,但与烧结砖的国家标准相比,两种成型方式的烧结砖各种性能都达到标准。     

AN X-RAY STUDY OF THE TOUGHNESS OF PAVING BRICK*

X-ray diffraction photographs of paving brick were compared with those of pure materials. The most important result obtained in this work is the discovery of a line in the X-ray diffraction pattern of paving brick which is characteristic of high-grade shale paving brick. This line, produced by an undetermined crystal, is more intense in the tougher than in the weaker brick. The line falls at 2.03 ± 0.01 Ångström units. A further result of this investigation is the proof that cristobalite, mullite, sillimanite, alumina, and cyanite are not present in the paving brick studied. This also shows that mullite is not produced in ceramic materials at the relatively low temperature at which paving brick are fired.     

INVESTIGATION OF THE EFFECT OF LOW-FIRED GROGS ON PROPERTIES OF SOFT-MUD BRICK*

Soft-mud brick were made from various mixtures of Hudson River clay and grog prepared by calcining the clay at 500°, 700°, and 900°C., and rate of drying tests were carried out. The brick were fired to cones 012, 08, and 04, and a special fast fire to cone 08 was also run. The various properties were compared with those of regular mix brick and all-clay brick. Brick made of a mixture of clay with 35% of 900°C. grog had particularly satisfactory properties such as to afford definite advantages as regards faster drying and accelerated firing.     

COMPARISON OF REPEATED REHEAT TESTS OF VARIOUS GRADES OF FIREBRICK WITH SERVICE RESULTS

Representative brands of Navy-approved class A brick (60% alumina), class B brick (superduty), and special firebrick (in a price group above the 60% alumina brick) were installed in a naval boiler operating continuously at the Naval Boiler and Turbine Laboratory. The permanent volume change of the various brands, subjected to repeated reheat tests at 2912°F., is compared with their service life.     

THE BEHAVIOR OF FIRE BRICK IN MALLEABLE-IRON FURNACE BUNGS1

Purpose. —An investigation was conducted to study the requirements of fire clay and bodies used for fire brick in malleable-iron furnace bungs. Tests were made on complete bungs holding forty sample brick in malleable-iron furnace bungs with twenty different fire brick. Laboratory tests were also made in conjunction with them. Results. —The spalling tests bear the closest relation to the service test; those brick losing less than 10% withstand more than fifteen heats. There is also a relation between the porosities and densities of fire brick, which lie between 15 and 28% and 1.5 and 2.6%, respectively, for the best brick. There is no close relation between the load test and softening-points of fire brick and their lifetime in malleable furnace bungs, so these tests are no criterions in judging the serviceability of brick, provided the brick are sufficiently refractory to support the arch at furnace temperatures. Methods for Improving Fire Brick. —The resistance of a brick to spalling may be governed by: (1) the selection of the proper clays, (2) the size of grain and the proportioning of the non-plastic ingredients, (3) the fineness of grain of the bond clay, (4) the manner of molding, and (5) the temperature of firing.     

煅烧回转窑窑口掉砖探讨

从煅烧回转窑运行过程中热胀冷缩引起砖缝的变化,以及钢筒体对砖产生的应力等方面,分析窑口掉砖的原因。提出了改进窑口砖制作及安装质量的几点建议     

煤焦浆气化炉用耐火材料的选择

采用回转抗渣法进行氧化锆砖、高纯刚玉砖、铬刚玉砖、86高铬砖和90高铬砖等不同材质耐火材料抗石油焦渣侵蚀能力的对比试验,并采用扫描电镜和X衍射等分析方法对侵蚀试验砖的显微结构进行了观察与分析,研究了不同材质耐火材料抗石油焦渣侵蚀能力的差异.结果显示:90高铬砖抗石油焦渣侵蚀能力最好,试验前后厚度几乎无变化;氧化锆砖最差,侵蚀厚度达14 mm;不同材质耐火材料抗侵蚀性能优劣的顺序为:90铬砖>85铬砖>铬刚玉砖>刚玉砖>氧化锆砖.