共查询到20条相似文献,搜索用时 31 毫秒
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铸造镍基合金切削加工 总被引:2,自引:0,他引:2
铸造镍基高温合金K418是一种难加工材料,为解决某厂增压器蜗轮轴的切削难题,作者采用多种刀具材料,对K418材料作了大量的切削试验。结果表明,在本试验条件下硬质合金刀具YD15、YG8913切削效果最佳;陶瓷与CBN刀具的韧性不足,边界磨损十分严重. 相似文献
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本文从切削表面形成的机理出发,分析了精密切削过程中切削作用力的变化规律,建立了精密切削加工新的切削模型,得到了切削力与各主要参数的关系式及切削方程式,探明了精密切削加工机理。 相似文献
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钛合金因其性能的优越性,在航空、航天、石油、化工、汽车等工业生产领域得到了广泛应用,但在数控加工钛合金过程中,存在切削效率低下,刀具耐磨性差,切屑排屑困难等加工难题。为此,笔者通过反复研 相似文献
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对切削加工性能的影响 总被引:8,自引:0,他引:8
为分析过共晶铝硅合金组织对其切削加工性能的影响,对两种化学成分相同但是组织结构不同的过共晶铝硅合金进行了切削试验研究并探讨了其切削机理.试验结果表明:过共晶铝硅合金经变质处理后组织中初晶硅的大小、形状和分布状况对切削刀具寿命和合金的切削加工表面质量影响极大,具有细小、分散而形状圆钝化初晶硅的合金有比较好的切削性能.造成这种影响的主要原因在于细小的硅粒比较容易协同基体塑性变形和被刀具压入切屑和已加工表面,而粗大的硅块往往发生解理破碎、脱落和位移,直接与刀具发生强烈摩擦并使已加工表面存留许多缺陷. 相似文献
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通过对航空发动机涡轮盘的新型高温合金材料GH761的切削加工性能试验研究,建立了在一定条件下的切削力,切削温度的预报方程,并在实验的基础上对两种高温合金材料GH761与GH135进行对比,评定和探讨了GH761的切削加工性能及其改善措施,为现场的实际生产提供了一定的参考依据。 相似文献
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BAM1020颗粒物检测仪在空气自动监测中得到广泛运用,对其工作原理、校准以及使用过程中常出现的故障进行阐述。 相似文献
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李卫东邓仑高阳朱尉杨海鹏 《仪器仪表与分析监测》2014,(1):8-11
在研究了常用电缆模型和检测理论的基础上,针对目前市场上电缆检测设备的复杂、昂贵等不足,提出了一种基于SOPC的时频域联合分析(TFDR)的电缆故障检测方案,实现了基于SOPC技术的简易低成本电缆故障检测仪的设计,同时满足了检测的精度要求. 相似文献
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针对变速器轴承振动信号不平稳、特征难以提取等问题,以对振动信号的幅值和频率的变化不敏感的5种无量纲参数为特征参数,将这5种特征参数分为自我模式和非我模式,并基于人工免疫原理设计了一种自适应免疫检测器米克服传统变速器轴承故障诊断方法的局限,重新定义了自适应变异和抑制阈。在变速器轴承实验台上,首先对变速器轴承6种状态下的振动加速度信息进行了测量;然后计算了这些振动信息的无量纲指标;再用所得到的5种无量纲特征参数训练免疫检测器,使之成为成熟检测器;最后采用训练好的成熟检测器对变速器轴承的故障状态进行了诊断。试验结果表明:利用自适应免疫检测器进行变速器轴承故障诊断是可行的,而且该检测器具有较强的故障识别能力。 相似文献
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赛默飞世尔ARL9900X射线荧光光谱仪日常分析时,会出现TFe元素无成分,其它元素成分正常的现象.本文解析了X射线荧光光谱仪的工作原理,运用角度扫描和能量描迹的方法进行故障分析,确定SC探测器故障,并进行更换处理,再结合SC探测器工作原理及结构,对故障产生原因进行了探讨,总结使用维护经验. 相似文献
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Web-based remote monitoring and fault diagnosis system 总被引:2,自引:0,他引:2
Xing Wu Jin Chen Ruqiang Li Fucai Li 《The International Journal of Advanced Manufacturing Technology》2006,28(1-2):162-175
This paper proposes an approved Web-based multilayer distributed software architecture solution for remote monitoring and
fault diagnosis. To tightly integrate legacy monitor systems, a component framework model based on COM has been proposed,
which is very suitable for remote monitoring and fault diagnosis applications. This system has the potential for exchanging
a data acquisition system by using wrapper service components. A mixed thick Web client architecture is proposed to implement
real-time remote monitoring. A Web-based remote monitoring and fault diagnosis system is developed by using modeling technology,
Web application technology, component technology and VME extension for instrumentation (VXI) bus technology, which publishes
a fault diagnosis algorithm package, a basic monitoring package and an advanced analysis package on the Internet. This system
provides authorized users with an effective and instant way to access new monitoring and diagnosis component packages in time.
This paper gives researchers a paradigm to accomplish similar systems. The technique developed may be used for other fields,
such as power engineering, manufacture and transportation system. 相似文献
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Two vertical cosmic ray telescopes for atmospheric cosmic ray ionization event detection are compared. Counter A, designed for low power remote use, was deployed in the Welsh mountains; its event rate increased with altitude as expected from atmospheric cosmic ray absorption. Independently, Counter B's event rate was found to vary with incoming particle acceptance angle. Simultaneous co-located comparison of both telescopes exposed to atmospheric ionization showed a linear relationship between their event rates. 相似文献
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K. F. Martin P. Thorpe 《The International Journal of Advanced Manufacturing Technology》1990,5(1):66-85
A new methodology is described for the condition monitoring and fault diagnosis of machine tool coolant systems. The steady
state characteristics of the coolant system pump outlet pressure, pump motor temperature and tank level are used to define
health parameters from which the system health is deduced. On detection of a significant change in system health the pressure
transient on closure of the flow valve is captured to aid diagnosis of the fault.
A demonstration system for the coolant system of a Wadkin V4-6 machine tool is described. This is used to verify the usefulness
of the health system described above by simulation of a number of typical faults. 相似文献
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基于整个网络以及其中的某些关键网络单元的有效测试验证,已经成为电信领域研究的一个重要方面。本文主要从系统的开发、测试软硬件环境,系统的软件体系结构,监控网络结构,数据库设计等方面描述本文的监控系统的概要设计,对于今后网络故障监控系统设计发展具有一定帮助。 相似文献
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Fagang Zhao Jin Chen Guangming Dong Lei Guo 《The International Journal of Advanced Manufacturing Technology》2010,46(9-12):1191-1200
This paper describes the development of the service-oriented architecture (SOA)-based Remote Condition Monitoring and Fault Diagnosis System in the field of equipments remote monitoring and fault diagnosis. The architecture is based on Web Services, Smart Client, and Extensible Markup Language (XML) technologies etc. More specifically, the paper analyzes the structures and the requirements in equipments remote monitoring and fault diagnosis. Finally, the SOA-based Enterprise Monitoring and Fault Diagnosis System has been developed and realized with Visual Studio 2005, which has been applied to industrial field. It verifies the effectiveness and practicality of the system. 相似文献