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《现代涂料与涂装》2014,(10)
<正>在汽车涂装线中,喷涂机器人的应用越来越广泛,本期针对喷涂机器人的应用进行重点报道。张力的"浅谈外表面喷涂机器人仿形编制"介绍了涂装车间轿车车身中涂、面漆外表面喷涂机器人新增车型准备阶段仿形编制的过程,分析了仿形编制过程中容易出现的一些问题及解决措施杨报军的"喷涂机器人设计时与其他设备之间的关联"以DURR喷涂机器人为例,简单介绍规划设计时机器人系统与其他设备之间的关联,同时对其工作界面分工,接口以及要求等进行说明任文玲的"新车型涂装机器人仿形开发过程及漆膜调试"从制定喷涂轨迹、离线仿形程序编制、现场示教、漆膜调试等方面,介绍了涂装机器人仿形程序开发过程。胥卫奇等的"透248 nm UV光纤涂料的研制"制备了一种UV固化纯丙烯酸酸,在248 nm下具有良好的透过性,可作为光纤一次被覆涂料,用于刻写光纤光栅。胥桂萍的"对苯二 相似文献
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对全钢载重子午线轮胎仿形缠绕过程进行预测控制研究,运用数学模型摆脱模拟闭环仿形缠绕,实现数字化控制轮胎仿形缠绕过程。试验结果表明,轮胎仿形缠绕效果较好,且不易受外界因素干扰,质量和精度大幅提高,极大地提高了生产效率。 相似文献
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从制定喷涂轨迹、离线仿形程序编制、现场示教、漆膜调试等方面,详细介绍了涂装机器人仿形程序开发过程。 相似文献
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1 异形纤维截面形状改变喷丝孔的截面形状 ,可以得到三角形、多角形、三叶形、多叶形、十字形、扁平形、Y形、H形、哑铃形等异形纤维。异形纤维具有特殊的光泽、蓬松性、抗起球性、回弹性、吸温性等特点 ,因此织物手感厚实 ,有温暖感 ,大量用于各种仿毛、仿丝、仿麻产品中。异形纤维按用途和截面形态的关系 ,主要有以下 4大系列。( 1 )三角形系列 三角形系列的异形纤维主要适应要求有闪光效应的仿丝绸织物、仿毛织物、灯芯绒、平绒等绒类织物、毛线、装饰织物等。 ( 2 )中空形系列 中空形系列异形纤维主要适应仿毛织物、保暖制品、工业… 相似文献
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Dinesh Singh J. K. Gehlawat Musti S. Rao 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1990,47(2):127-136
Oslefins and diolefins are important intermediates in the petrochemical industry and the future promises a further substantial increase in demand. While several catalysts have been formulated in the past for the abstraction of hydrogen from butenes and propylene, these catalysts are inefficient in the abstraction of first hydrogen from butane. Bismuth molybdates (β and γ-phases) containing iron oxide and supported on alumina are used as catalysts in the present investigation on the oxidative dehydrogenation of n-butane. Effects of catalyst content, temperature and oxygen: n-butane ratio on conversion and selectivity to butadiene and (C4H8 + C4H6) are studied in the following ranges of experimental conditions: β-bismuth molybdate/100 mol support I(K), 3–9; γ-bismuth molybdate/100 mol support I(K), 5-20; temperature, 400–500°C; O2: butane ratio, 0.6:1.7. 相似文献
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A viscometer used to measure the viscosity of 10 μl of a liquid, must be miniaturized down, and the liquid velocity gradient in the channel used to determine the viscosity coefficient. Two major factors that affect the liquid velocity are the mechanical forces exerted by the mechanical motors and electromagnetic forces. In this study, electrowetting on dielectric (EWOD) is adopted to drive liquids. Variously sized electrodes on a chip, and two shapes of channel are employed to measure the velocity gradient to determine the viscosity coefficient. The device is fabricated by microelectromechanical system (MEMS) technology. The dielectric layer used in EWOD has a high dielectric constant, BST (Ba0.7Sr0.3TiO3), to reduce the required applied voltage; its surface is coated with hydrophobic polymer, polytetrafluoro-ethylene (PTFE, Teflon® AF DuPont). Experimental results demonstrate that liquids can be pulled at 660 μm/s in linear channels by applying a voltage of 15 V. 相似文献
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考登钢作为一种高耐候结构钢,广泛应用于各个领域。在火力发电方面,考登钢主要应用在工作环境比较恶劣的烟气加热器和空气预热器中。考登钢表面涂搪的目的就是进一步提高其耐腐蚀性能,延长使用寿命。为了提高考登钢元件的使用寿命,对考登钢表面涂搪瓷的可行性、密着性能、瓷釉、工艺控制、质量保证等方面进行了研究。 相似文献
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研究了温度和pH值对漆酶酶活以及漆酶处理纤维压制纤维板性能的影响。结果表明,pH较低、温度较高时漆酶酶活较高,压制的纤维板强度性能较好。但温度太高(60~80℃),延长加热时间,漆酶稳定性变差,酶活明显降低,压制纤维板的强度下降。 相似文献
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In reexamining medium effects on photochemical reactions, we have emphasized those on unequilibrated excited species such as the Franck-Condon species. Despite recent advances in femtochemistry, such a discussion in molecular photochemistry is uncommon, and the problem remains challenging on account of the extremely short-lived excited species. However, in such cases, a small perturbation resulting from, for example, weak guest-host interactions could turn into a determining factor in dictating the course of a photochemical channel of deactivation. Examples of medium-directed diabatic processes have been examined with this idea in mind. A modified view on rhodopsin photoisomerization is presented along with the consideration that confinement does not necessarily lead to inhibition of reactions of the trapped substrate. 相似文献
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采用密度泛函理论(DFT)考察了丙烷在Pt(111)表面上脱氢生成丙烯的反应机理。通过在Pt(111)面上预吸附一定数量H原子模拟共吸附H对丙烷脱氢过程的影响。结果表明:H共吸附能降低丙烷及其脱氢产物的吸附能,促进丙烯脱附,有利于提高丙烯的选择性;H共吸附会导致丙烷脱氢能垒变大,降低催化剂的脱氢活性;共吸附的影响随着H覆盖率增加而增大。 相似文献