FLOW FIELD ANALYSIS AND GRAPHIC CAD DURING 3─ROLL REDUCING OF THE HOLLOW TUBE

ＦＬＯＷＦＩＥＬＤＡＮＡＬＹＳＩＳＡＮＤＧＲＡＰＨＩＣＣＡＤＤＵＲＩＮＧ３─ＲＯＬＬＲＥＤＵＣＩＮＧＯＦＴＨＥＨＯＬＬＯＷＴＵＢＥＦＬＯＷＦＩＥＬＤＡＮＡＬＹＳＩＳＡＮＤＧＲＡＰＨＩＣＣＡＤＤＵＲＩＮＧ３─ＲＯＬＬＲＥＤＵＣＩＮＧＯＦＴＨＥＨＯＬＬＯ...     

新型陶瓷刀具LD－1的切削性能

对新型陶瓷刀具ＬＤ－１切削超高强度钢和淬硬钢时的切削性能作了试验研究，结果表明，ＬＤ－１刀具较其它Ａｌ２Ｏ３－ＴｉＣ系陶瓷刀具更适于断续切削加工，因而具有较大的推广应用价值。     

新型陶瓷刀具LD—1的切削性能

对新型陶瓷刀具ＬＤ－１切削超高强度钢和淬硬钢时的切削性能作了试验研究，结果表明，ＬＤ－１刀具较其它Ａｌ２Ｏ３－ＴｉＣ系陶瓷刀具更适于断续切削加工，因而具有较大的推广应用价值。     

ERROR PROCESSING METHOD OF CYCLOIDAL GEAR MEASUREMENT USING 3D COORDINATES MEASURING MACHINE

ＥＲＲＯＲＰＲＯＣＥＳＳＩＮＧＭＥＴＨＯＤＯＦＣＹＣＬＯＩＤＡＬＧＥＡＲＭＥＡＳＵＲＥＭＥＮＴＵＳＩＮＧ３ＤＣＯＯＲＤＩＮＡＴＥＳＭＥＡＳＵＲＩＮＧＭＡＣＨＩＮＥＺｈａｉＨａｉｙｕｎＬｉＺｈｅｎＣｈｅｎＬｉｎｃａｉＢｉＦｅｎｇｊｉｅＳｃｈｏｏｌｏｆＰ...     

3D RIGID－PLASTIC FINTEELEMENT ANALYSIS OF BACKWARD SPINNING OF CYLINDRICAL WORKPIECE

３ＤＲＩＧＩＤ－ＰＬＡＳＴＩＣＦＩＮＴＥＥＬＥＭＥＮＴＡＮＡＬＹＳＩＳＯＦＢＡＣＫＷＡＲＤＳＰＩＮＮＩＮＧＯＦＣＹＬＩＮＤＲＩＣＡＬＷＯＲＫＰＩＥＣＥ３ＤＲＩＧＩＤ－ＰＬＡＳＴＩＣＦＩＮＴＥＥＬＥＭＥＮＴＡＮＡＬＹＳＩＳＯＦＢＡＣＫＷＡＲＤＳＰＩＮＮ...     

微功耗LiCl露点传感器的研究

本文介绍一种以ＬｉＣｌ露点传感器的基本原理为基础，研制的一种功耗小于１５０ｍＷ，露点在－３０～＋４０℃范围内不出现氯化锂水合物转变，精度小于０．５℃的新型露点传感器。它的结构及预热方式和通常的ＬＩＣＩ—露点传感器完全不同，它是将ＬｉＣＩ溶液浸渍在带有加热膜的γ－Ａｌ２Ｏ３陶瓷膜载体上，利用ＬＩＣＩ·Ｈ２Ｏ盐的交流阻抗在湿度为１１％ＲＨ发生突变之特性，控制外电路，自动调节加热膜的加热功率，维持露池温度。由于载体上的ＬｉＣｌ盐未有加热电流通过，因此很好地克服了ＬｉＣｌ盐的极化现象。文章最后就如何克服ＬｉＣＩ水合物转变这一问题进去了探讨。     

COMPUTER SIMULATION OF 3-DIMENSIONAL DYNAMIC ASSEMBLY PROCESS OF MECHANICAL ROTATIONAL BODY

ＣＯＭＰＵＴＥＲＳＩＭＵＬＡＴＩＯＮＯＦ３ＤＩＭＥＮＳＩＯＮＡＬＤＹＮＡＭＩＣＡＳＳＥＭＢＬＹＰＲＯＣＥＳＳＯＦＭＥＣＨＡＮＩＣＡＬＲＯＴＡＴＩＯＮＡＬＢＯＤＹＹａｎｇＪｉｃｈａｎｇＬｉＪｉｎｂａｎＧｕＪｉｎａｎＺｈａｎｇＺｉｙｕＪｉａｎｇｓｕＵｎ...     

STUDY OF THE 3-DIMENSIONAL STRESSES OF COLD STRIP ROLLING UNDER CENTRE WAVE

ＳＴＵＤＹＯＦＴＨＥ３－ＤＩＭＥＮＳＩＯＮＡＬＳＴＲＥＳＳＥＳＯＦＣＯＬＤＳＴＲＩＰＲＯＬＬＩＮＧＵＮＤＥＲＣＥＮＴＲＥＷＡＶＥ￥ＬｉｕＨｏｎｇｍｉｎ；ＢｉａｎＹｕｈｏｎｇ；ＬｉａｎＪｉａｃｈｕａｎｇ（ＹａｎｓｈａｎＵｎｉｖｅｒｓｉｔｙ）Ａｂｓｔｒａ...     

TOGA COARE 试验期间的深水CO2观测

本文重点介绍１９９２年１０月至１９９３年３月在“ＴＯＧＡ ＣＯＡＲＥ”（热带西太平洋海气耦合试验）中在船上使用的带双平衡器的ＬＤＧＯ气相色谱系统,并给出了次表水和深水中总溶解浓度（ＴＣＯ２）和分压（ＰＣＯ２）的观测结果。     

MATHEMATICAL MODEL OF NC MACHINING NONCONVENTIONAL MILLING CUTTERS-FORMING METHOD OF RAKE FACES

ＭＡＴＨＥＭＡＴＩＣＡＬＭＯＤＥＬＯＦＮＣＭＡＣＨＩＮＩＮＧＮＯＮＣＯＮＶＥＮＴＩＯＮＡＬＭＩＬＬＩＮＧＣＵＴＴＥＲＳ－ＦＯＲＭＩＮＧＭＥＴＨＯＤＯＦＲＡＫＥＦＡＣＥＳＳｈｅｎＱｉａｎ，ＷａｎｇＭｉｎＮａｎｊｉｎｇＵｎｉｖｅｒｓｉｔｙｏｆＡｅｒｏｎａ...     

基于工业互联网的数控机床数据采集平台应用研究

设计并实现一种基于工业互联网的数控机床数据采集平台,实现远程感测、实时监测和功能动态扩展,并能为后续远程诊断提供安全可靠的数据。该数据平台基于工业互联网的,采用MTconnect协议标准,在物理层实现物理机床的和传感器的部署;在网络层开发适配器和代理服务器模块,实现数据平台的实时监测和动态拓展;在应用层开发了对采集数据的处理的数据可视化平台,并能支持不同的机器学习算法用于对所采集数据的分析。系统设计中对数据采集进行优化,在一个周期内发现数据有变化才将数据上传到数据平台,从而避免大量数据传输造成网络的延迟和冗余。最后通过实验,验证所开发的数据采集平台的有效性,满足数控机床对数据采集与分析的需求。     

对木工推台锯上的德国圆锯片切削功率的国产化试验研究

介绍了一种测试木工推台锯[1]上圆锯片的切削功率的研究方法。运用频率跟踪法,利用电量隔离传感器与工控机界面对在推台锯上的两种德国产新圆锯片进行了切削功率、功率因子、电流和电压值的测试与相关分析,以期为木工机械、人造板机械和刀具行业的国产化优化设计工作提供借鉴。     

Wear of the blade diamond tools in truing vitreous bond grinding wheels: Part II. Truing and grinding forces and wear mechanism

Truing and grinding forces and the wear mechanism of particle and rod diamond blade tools used to generate precise and intricate forms on rotating vitreous bond silicon carbide grinding wheels are presented. A Hall effect sensor was used to measure the change of grinding spindle power during truing and grinding. A signal processing procedure was developed to identify individual truing passes and to extract the average, peak-to-valley, and standard deviation of the variation of truing force for each pass. The truing force data and SEM micrographs of worn surfaces on blade tools reveal micro- and macro-fracturing of the diamond. The attritious and erosion wear of the diamond rod and particle, erosion of the metal bond, and pulling-out of the diamond particle are also identified. Grinding force data shows that, for the same truing parameters, a wheel trued by the rod diamond blade tool has higher grinding forces than one trued by a particle diamond blade tool.     

A stabilizer of micro- and small currents based on a field hall-effect sensor with autocompensation of the temperature effect

A stabilizer of micro- and small currents based on a field Hall-effect sensor is considered. The field-effect Hall sensor is an integration of a conventional Si Hall element and an Si thin-film doublegate field-effect transistor. It is shown that formation of feedbacks between Hall contacts, field gates, and power sources makes it possible to stabilize the sensor current with accuracy of not worse than 1% when the load resistance changes by an order and the temperature varies in the 25–65°C range.     

WSN在数控机床群与换刀机器人中的应用研究

为了实现换刀机器人与数控机床群的信息交换,研制了一个无线传感器网络.每台数控机床和换刀机器人都安装了一个传感器节点,数控机床传感器节点动态感知和采集数控机床的加工状态和换刀信息,并传输给换刀机器人的汇聚节点.换刀机器人一旦接收到换刀指令,立即执行数控机床的换刀任务,并将数控机床群感知采集的加工状态和换刀信息,通过GPRS传输到数控机床群远程控制中心,实现数控机床群远程实时监控.     

刀具工件双旋转运动机床加工过程的能量效率获取方法

对于刀具工件双旋转运动机床,由于切削力测量仪器难以安装,同时,切削力理论模型和经验公式难以反映加工过程切削力的瞬态变化,这使得刀具工件双旋转运动机床的能量效率至今难于获取。为此,提出一种运用载荷损耗系数计算获取刀具工件双旋转运动机床能量效率的方法,该方法首先建立了刀具工件双旋转运动机床的能量效率模型,然后基于刀具、工件系统的能耗组件参数分别建立了刀具轴和工件轴的载荷损耗系数计算模型,并由此推导出刀具工件双旋转运动机床的载荷损耗能量、有效能量及能量效率的计算分析模型。实际应用时,该方法只需要安装功率传感器测取加工过程中的输入功率和空载功率,便可计算获取能量效率。实验验证表明,该方法具有较好的能量效率获取精度。应用案例表明,所提方法应用方便,可为刀具工件双旋转运动机床的能效预测、监控与管理提供技术支撑,具有较好的应用前景。     

基于霍尔元件的润滑点无油检测系统

通过分析使用于钢坯剪断机的真空滴油式注油器的工作原理,分析了引起润滑点无油的主要原因在于注油器的损坏和油路管道的堵塞,并根据这两种情况,利用霍尔效应的原理,设计并制造了可检测摩擦运动副处是否有油的滑润点无油检测系统。该系统还具有声光报警功能、控制功能和一些其它的辅助功能。采用该系统可避免机床零件的损坏,保证机床安全可靠地运行。     

A novel magnetostrictive static force sensor based on the giant magnetostrictive material

In order to realize static force measuring and improve the sensitivity of magnetostrictive force sensor, a novel magnetostrictive static force sensor with giant magnetostrictive material rod is presented. A Hall sensor integrated in the sensor is used to measure magnetic flux density variation under force. A special structure surrounding Hall sensor is proposed to improve the sensitivity. The design method of the giant magnetostrictive force sensor is expounded firstly. The magnetic characteristics are analyzed by FEM. A model is developed based on the coupled linear magnetomechanical constitutive equations and the experimental result shows that the model is good at reflecting the force. The optimal bias magnetic field and sensitivity are studied through experiments. The sensor sensitivity is 6.14 times higher than that of the sensor which dose not have a stainless steel ring. The paper lays a foundation for the development of magnetostrictive force sensor with giant magnetostrictive material.     

Self-powered wireless thermoelectric sensors

Sensors capable of measuring various performance parameters of an operational power generation unit could help improve system performance and overall efficiencies. For example, measurement of temperatures, temperature differences, or exhaust gas concentrations could provide both a quick quantitative and qualitative assessment of system health and allow for operation of power units with smaller safety margins and therefore higher efficiencies. For this study a technique is presented that can transmit data about an operational system wirelessly in real-time to an external location. For these experiments thermoelectric element leads were connected to a solenoid coil. When the thermoelectric was exposed to a temperature difference a current was generated in the thermoelectric and solenoid coil resulting in a magnetic field. A receiver was then used to measure the changes in magnetic field of the system. Two primary configurations were developed to test this wireless sensor configuration: dynamic and static. For dynamic measurements a pendulum and pneumatic air cylinder were used to simulate a moving component that may pass the external Hall sensor such as a fan or turbine blade. For dynamic measurements it was determined that for accurate results it is very important to maintain the distance constant between the Hall sensor and solenoid coil. For stationary measurements the temperature difference across the thermoelectric was related to output measurements from the Hall sensor. Overall, results show that data can be wirelessly transmitted to an external location using this method.     

混联机床的静刚度实验测量

机床的静刚度是保证其工作性能的重要指标,用理论模型对机床静刚度进行研究难免产生偏差,因此有必要对其进行实验研究.文中针对一台近期研发成功的混联机床,利用力传感器和千分表对其进行静刚度的实验研究.对实验数据进行最小二乘直线拟合,得到该机床在工作空间内9个位姿的各方向静刚度.为了研究该机床静刚度的变化情况,计算同一水平面或竖直面内的静刚度变化率.文中方法和结论为该类型机床的静刚度理论研究和仿真提供实验依据.