高速电主轴关键零件的选型

为适应机床的发展，电主轴以结构紧凑、转速高、精度高、动态响应快为主流。从主轴电机和轴承两方面介绍了高速电主轴关键零件的选型，为高速电主轴的设计提供参考。     

基于PMAC-PC的精密加工系统的设计与实现

介绍了应用PMAC(Programmable Multi—Axis Controller)-PC作为核心控制器，设计集成了一套新型精密加工系统。研究了直线电机的伺服控制技术和电主轴的设计制造等问题。结合直线电机的微量往复进给运动和电主轴的高速性能，实现了对椭圆零件的高速精密加工。为推动高速高精度数控机床制造技术的发展打下基础。     

内装式电主轴冷却方式的探讨

车床用内装式电主轴是工件电主轴.这种电主轴能实现高速、高精度旋转,提高车削加工精度和表面粗糙度.文中通过分析电主轴的发热、传热过程,探讨了内装式电主轴的冷却方式.     

基于电主轴的高速轴承及其热分析

高速加工需要高转速的机床,电主轴作为机床高速化的发展方向,在高速加工中得到越来越广泛的应用.高速轴承技术是电主轴的关键技术,其技术水平决定了电主轴的转速及承载能力.同时,轴承的摩擦功率产生的热量,使得电主轴温度升高,产生一定热应力和热变形,影响加工精度.因此,有必要对轴承的摩擦功率进行深入研究.研究了电主轴中几种常见的轴承支撑技术,从理论和实际应用上分析了其摩擦功率大小,可以为电主轴的轴承设计提供依据.     

高速电主轴电动机故障诊断与绕组修理

介绍高速电主轴电机结构特点故障诊断及修理方法供电主轴电机设计,修理及使用人员参考。     

基于机床数控系统的电主轴控制技术

随着机床产业的不断发展,电主轴的应用越来越广泛,电主轴上配置星角切换装置后,不但具有低转速时高扭矩,还具备高转速时大功率的特性。高速运转的电主轴的主轴型式是将主轴电机的定子、转子直接装入主轴组件的内部,即把高速电机置于精密主轴内部,电主轴的电机转子就是主轴,主轴的壳体就是电机的机座,实现了变频调速电机和主轴一体,电机直接驱动主轴,形成电主轴。     

高速电主轴的热特性分析

分析了高速电主轴中电机的损耗发热和轴承的摩擦发热，并提出了减小其损耗和改进其冷却状况的措施，为电主轴的热稳定性的解决奠定了理论基础。     

陶瓷球轴承高精密电主轴临界转速分析

主要研究陶瓷球轴承高精密电主轴动态性能。首先简化并建立轴承—转子系统模型,然后根据电主轴高精度要求选择合适的预紧力,并计算出前后轴承的径向刚度;将所建模型导入软件,根据径向刚度值进行模态分析,结果可以看出所设计电主轴在实际运转中不会产生共振;最后分析出电机转子安装位置变化对临界转速的影响不大,并对比跨距和悬伸量两个模态参数对临界转速的影响,跨距影响最大,悬伸量次之,而安装位置影响最小。该研究为电主轴的设计提供良好的理论依据。     

基于PMAC下砂轮-电主轴系统的振动特性与分析

本文介绍了开放式运动控制器PMAC、陶瓷电主轴及其特性，并分析了PMAC-PC控制下直线电机的性能。通过实验，对砂轮-电主轴系统的振动特性进行了分析，找到了影响电主轴系统振动的主要因素。     

基于PMAC-PC的HIPSN陶瓷套圈高速内圆磨削

利用高速陶瓷电主轴单元、直线电动机等设计集成了一套基于PMAC-PC的高速精密数控磨床系统，并用来进行陶瓷套圈内圆表面的磨削实验研究。在磨削实验过程中对砂轮电主轴进行了振动测试和分析，分析了影响陶瓷套圈内圆表面磨削质量和磨削效率的主要因素，加工出了高精度HIPSN陶瓷零件。通过实验验证了本磨床系统的稳定性，利用该磨床系统能实现HIPSN陶瓷零件的高速精.     

紧凑型高速电主轴拉刀机构静动态特性分析与优化

介绍了紧凑型高速电主轴的结构设计,建立了主轴-拉刀机构双转子系统模型,研究了电主轴拉刀机构的静动态特性,得到了工作状态下电主轴的静态位移、振型、固有频率以及关键点的响应位移。对主轴-拉刀材料、轴承预紧力、轴承组跨距、主轴-拉刀接触刚度以及主轴-刀柄接触刚度等参数进行优化设计。结果表明优化后电主轴的静动刚度均满足要求、固有频率提高、电主轴安全工作频率区间增大。电主轴模态测试结果证明了以上结果的可靠性。该研究为紧凑型高速电主轴的设计提供了理论基础。     

数控车床主轴单元结构节能性优化设计

为降低数控车床使用过程中的能耗,针对主传动系统中的主轴部件提出一种面向节能的结构优化设计方法。首先构建主轴单元功率模型并分析其动静态性能指标;然后基于均匀试验和灵敏度分析,选取对主轴单元能耗和动静态性能影响较大的尺寸参数作为优化变量,再通过响应面法拟合指标函数;之后利用主成分分析法降低函数维度,建立主轴单元结构节能设计优化模型;最后采用实体实验验证仿真结果的可靠性,并使用模拟退火粒子群混合算法对该优化模型进行求解。优化前后主轴的仿真实验和谐响应分析对比结果表明：相对优化前,优化后主轴最大变形减小1.67%,二阶频率提高6.83%,空载能耗降低3.69%,该优化设计方法在降低主轴能耗的同时提高了主轴动静态性能。     

Herringbone‐grooved bearing with non‐uniform grooves for high‐speed spindle

A hydrodynamic bearing with non‐uniform herringbone grooves has been developed for use with high‐speed motor spindles. The grooves gradually become narrower, shallower and less straight (curved) towards the herringbone centre along axial direction, resulting in an increased pumping effect of the spiral grooves. The optimum dimensions of the grooves for increasing the critical bearing number were clarified theoretically, and bearings with non‐uniform herringbone grooves were found to increase the critical bearing number against the half‐frequency whirl up to about 50% in comparison to bearings with uniform herringbone grooves. Experiments to investigate the suitability of the proposed bearing for high‐speed spindles showed that the maximum rotational speed of a spindle with this bearing was about 20% higher, close to the theoretically predicted 23%, and thus proved that application of this bearing should enable spindles to achieve faster stable rotation as theoretically expected. Copyright © 2010 John Wiley & Sons, Ltd.     

Dynamic design for motorized spindles based on an integrated model

With increasing popularity in high-speed machining for its high efficiency, motorized spindles have been widely utilized in modern production facilities. Due to the combination of tools and built-in motors, the dynamic characteristics of motorized spindles are more complex compared with conventional spindles, and it is becoming necessary for engineers to thoroughly realize the influences of the system parameters to the system dynamics with considering the multi-physics coupling property. This paper presents an integrated model to study the electro-thermo-mechanical dynamic behaviors of motorized spindles. The integrated model consists of four coupled submodels as follows: bearing, built-in motor, thermal, and shaft model. Based on the proposed model, a design flow chart is developed and six design parameters are identified. The integrated model is validated experimentally and a design sensitivity analysis of the six parameters is then conducted based on a 170MD15Y20 type spindle. The results show that the integrated model is capable of accurately predicting the dynamic characteristics of motorized spindles, and the sensitivities of the six design parameters to the nature frequencies of the spindle system are obtained with and without the influence of the multi-physics coupling property. The coupling relationship among the electrical, thermal, and mechanical behaviors of the spindle system becomes clear from the results.     

液体动静压轴承及主轴CAD

介绍液体动静压轴承及主轴的计算机辅助设计（ＣＡＤ）。通过使用证明，该设计具有良好的实用性和较高的设计水平。     

某雷达高频舱的结构总体设计

针对某雷达高频舱的结构特点,通过对其结构设计思路和方法的介绍,阐述了一类高频舱在进行结构总体设计时应重点考虑的几项关键技术,并对这几项关键技术进行了详细分析和计算.作为一种设计思路和方法,可在类似高频舱结构总体设计中参考与借鉴.     

双轴精镗孔机床的设计制造

介绍了针对铝合金活塞销孔的加工特点而设计的一种双主轴高速精密镗床，通过模块化的设计和国际大采购，以较低的成本制成了高精度、高 效率的设备，取得了很好的效益。     

机载高精度相控阵雷达天线阵面结构设计

以某机载高频天线阵面结构设计为例,介绍了高频机载天线阵面的结构特点及其高精度结构设计的相关关键技术。对天线阵面的设计要求、天线系统组成和设备集成方式进行了介绍。重点对可插拔的一体化线源模块以及天线框架的高精度结构设计、热设计和天线阵面设备的密封设计进行了详细叙述。最后通过力学仿真分析,验证得出该天线阵面结构设计合理,刚强度满足设计要求。     

独立成分分析及其在纺纱锭子噪音测试中的应用

纺纱锭子性能的优劣对生产效率和纱线质量具有决定性的影响。以纺纱锭子运转中的噪音信号为考察对象,对纺纱锭子运转过程进行分析。利用快速独立成分分析FastICA算法对工作状态中的锭子声压信号进行噪音源数据分离分析,得到工作状态下源信号的主频率。将工作状态下源信号的主频率与锭子不运转下的噪音主频率进行对比,38.88%分离主频率与锭子不运转下的噪音主频率一致,44.44%分离主频率与锭子不运转下的噪音主频率相近,最小误差为0.05%。实验与分析结果表明,FastICA算法用于噪音源信号主频率分离的有效性和正确性。     

Dynamics modeling and modal experimental study of high speed motorized spindle

This paper presents a dynamical model of high speed motorized spindles in free state and work state. In the free state, the housing is modeled as a rotor with equivalent masses including bearing pedestals, motor stator and rear end cover. As a consequence, a double rotor dynamics can be modeled for high speed motorized spindles by a bearing element which connects the housing and bearing pedestals. In the work state, the housing is fixed and the system becomes a bearing-rotor dynamical model. An excitation-measurement test in the free state is designed to analyze the cross spectral density and auto spectral density of input and output signals. Then the frequency response function of system and coherence function of input and output signals which are used to analyze the inherent characteristics of the double- rotor model can be obtained. The other vibration test in the work state is designed to research the dynamical supporting characteristics of bearings and the effects from bearings on the inherent characteristics of the system. The good agreement between the experimental data and theoretical results indicates that the dynamical model in two states is capable of accurately predicting the dynamic behavior of high speed motorized spindles.