共查询到20条相似文献,搜索用时 796 毫秒
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回转窑是金属镁厂采用最多的白云石煅烧设备,但是普遍存在能耗过高的问题。本文对影响回转窑能耗的因素进行了分析阐述,提出了实现回转窑节能降耗的一些途径,并介绍了回转窑煅烧白云石应注意的问题,以期对金属镁厂实现回转窑节能降耗有所帮助。 相似文献
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燃料在回转窑中燃烧时并不是全部析出热都用于加热燃烧产品:热燃烧过程中的部分热在燃烧带范围内以辐射的方式传给与其毗邻的带,由于燃烧产物的再循环而进入点火带。因此,燃烧带的气流的实际温度低于理论温度。窑的其它各带也自相邻的低温带以辐射方式散热。 相似文献
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阐述了回转窑自动控制来统优化设计方案与应用方法.回转窑实现自动控制后,其生产效益得到显著提高,煅后焦各项指标得到了改善. 相似文献
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Monitoring and control of the micro wire-EDM process 总被引:1,自引:1,他引:1
Mu-Tian Yan Hsing-Tsung Chien 《International Journal of Machine Tools and Manufacture》2007,47(1):148-157
A new pulse discriminating and control system has been developed for process monitoring and control in micro wire-EDM. The pulse discriminating and control system identifies four major gap states classified as open circuit, normal spark, arc discharge and short circuit based on the characteristics of gap voltage waveform. The effect of pulse interval, machining feedrate and workpiece thickness on the variations of the proportion of normal spark, arc discharge and short circuit in the total sparks (defined as normal ratio, arc ratio and short ratio, respectively) were investigated. It is found that a long pulse interval results in an increase of the short ratio under a constant feedrate machining condition. A high machining feedrate or an increase of workpiece height results in an increase of the short ratio. To achieve the stability of the machining operation, a control strategy is proposed by regulating the pulse interval of each spark in real-time according to the identified gap states. Experimental results indicate that the developed pulse discriminating and control system can significantly reduce the arc discharge and short sparking frequency as well as achieve stable machining under the condition where the instability of machining operation is prone to occur. 相似文献
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直流传动控制模块在焊管机组拖动中,具有提高效率和准确度以及降低差错率等作用,介绍了使用该控制模块的有关问题。 相似文献
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Process Monitoring in Grinding 总被引:5,自引:0,他引:5
The grinding process is characterised by a high number of cutting edges undergoing non-uniform wear, this also typifies a highly non-stationary process. Pure process modelling in order to understand the grinding mechanisms and to predict the work result is difficult. In view of this, several approaches by academia and by industry were made to address this issue. One such approach is the development and implementation of process monitoring in grinding. The work presented in this paper summarises the various elements and approaches in process monitoring during grinding. The paper deals with the relevant quantities that describe the grinding process itself and the ensuing work result. Furthermore the different sensing techniques are introduced to measure the relevant quantities. Finally an overview is presented as to the strategies and techniques involved in the interpretation of the measured data and the subsequent control action initiated in order to close the process control loop. 相似文献
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对基于运动控制卡的电火花成形机床数控系统进行了研究,简单介绍了该数控系统的硬件组成和放电间隙状态监测的实现方法,以Windows操作系统为数控系统的软件开发平台,运用LabWindows/CVI开发了基于运动控制卡的电火花成形机床数控系统,具有较强的可操作性和实用性. 相似文献
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弹药行业的产品生产加工过程中涉及焊接、热处理、表面处理等特殊工艺过程。产品设计过程中选用的材料和加工处理后追求高强度、高硬度特性而造成焊接性差,焊接生产引起了普遍关注。但是,长期以来焊接质量也停留在完全依靠其后的检验把关,只能从表面的检测结果来判断产品的好坏,不能做到产品全部检测,产品质量缺陷很容易在后续的工序和产品使用中暴露出来。因此在借鉴相关行业的焊接生产质量控制措施,按人、机、料、法等方面的要求进行过程控制,最大限度地满足了产品性能要求。 相似文献