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针对双乙类粉料传输过程中存在的劳动强度大、生产效率低、自动化程度低等缺陷,在分析双乙类粉料生产工艺流程的基础上,设计了基于PLC的双乙类粉料自动传输控制系统。系统以PLC作为主控制器,以触摸屏作为人机交互界面,PLC通过接收传感器检测信号,运行相应的指令程序驱动气缸动作,实现自动卸料,并通过RS-485与变频器组件相连,实现粉料传输速度的调节。该系统已投入工厂使用。试验结果表明:该系统性能稳定,自动化程度高,提高了生产效率。 相似文献
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针对电容器熔胶机存在加热不均匀、加热精度低、胶易炭化等问题,设计了基于PLC和增量式PID的电容器熔胶机温度控制系统,主要由FX2N系列PLC、温控模块FX2N-2LC、温控电路、人机界面、加热器、热电偶等组成;详细阐述了系统的硬件组成、软件流程及PID控制算法的实现。对温控系统进行了仿真及实验分析,仿真结果显示温控精度高,具有良好的自适应性和鲁棒性;实验测得系统能在15min内自动达到设定的目标温度值,且测量误差保持在(±1)℃以内。仿真及实验结果表明:该系统人机交互良好、性能稳定、温控精度高,有效实现了熔胶机温度的自动控制,具有良好的实际应用价值。 相似文献
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Effect of adding methods of metallic phase on microstructure and thermal shock resistance of Ni/(90NiFe2O4-10NiO) cermets 总被引:1,自引:0,他引:1
Ball mixing and electroless plating were respectively used as the adding methods of metallic phase to prepare Ni/(90NiFe2O4-10NiO) cermets for the inert anode in aluminum electrolysis. The microstructure and thermal shock resistance of cermet samples were studied. The results show that, for the samples prepared by ball mixing method, aggregation of metallic phase is found in either the green blocks or sintered samples and the extent of aggregation increases with the increase of metal content. For 6.5Ni/(90NiFe2O4-10NiO) cermets prepared with electroless plating method, the homogeneous and fine metallic particles are found in either the green compacts or sintered samples, but the relative density and thermal shock residual strength decrease by 3% and 28%-58% respectively, compared with samples prepared with ball mixing method. 相似文献
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The density of cermet inert anodes in aluminum electrolysis is of great importance. Ni-NiFe2O4 cermets were studied with respect to their densification affected by ball milling time, particle size of raw powders, contents of metallic phase, sintering atmosphere and temperature. The results show that, prolonging ball milling time will increase the density with the optimum value of 150 min; cermets containing 0 - 15 % Ni(mass fraction) have high relative density ranging from 94 % to 96%, but with Ni content increasing, the density slightly decreases; weak reductive atmosphere is favorable to densification; the relative density increases from 80.38% to 96.85% with the sintering temperature increasing from 1 100℃ to 1 300℃ while it decreases at 1 400℃, which may be due to crystal grain coarsening. So the sintering temperature of Ni-NiFe2O4 cerrnets in current work should be controlled at 1 300℃, where the relative density is 96.85 %. 相似文献
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借助ECAP技术对TiNi合金和Ti-Mo基记忆合金在673~773K进行挤压处理,挤压路径为Bc,以获得超细晶组织,从而增强母相的强度,改进材料的性能。研究热力学稳定相及亚稳相对这两种合金的力学性能和马氏体转变的影响。结果表明,对于富钛TiNi合金,热力学稳定相Ti2Ni对马氏体转变及超弹性没有影响,而稳定相α相则可造成Ti-Mo-Nb-V-Al塑性降低。亚稳Ti3Ni4相对富镍TiNi合金的R相变、马氏体转变及超弹性有很大影响。并对第二相对TiNi合金和Ti-Mo基合金力学性能、马氏体转变的影响进行分析。 相似文献
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钢帘线在捻制的过程中会产生残余扭转,导致钢帘线在捻制完成后沿捻制相反的方向出现不同程度的回转,严重影响钢帘线的使用性能。为了减小钢丝捻制过程中出现的残余扭转,设计了钢帘线残余扭转在线监测及自动消除控制系统。利用西门子S7-200系列PLC(programmable logic controller,可编程逻辑控制器)对控制系统的软件和硬件进行合理配置,并详细阐述了系统的硬件和软件设计。采用台达DOP系列的触摸屏,实现钢帘线残余扭转在线实时监测的功能。该设备整机性能稳定,实现了残余扭转的控制与消除,满足生产线高柔性化、高效率、高质量的自动化生产要求。 相似文献