TI蜗杆传动齿面接触误差的计算与分析

采用CAD三维造型技术与数值计算相结合的方法计算分析了各种加工误差及装配误差对TI蜗杆传动齿面接触的影响。其结果对有效提高TI蜗杆副的制造精度有指导意义。     

考虑动态刚度、传递误差及齿侧间隙的齿轮系统谐振分析

在所建立的考虑啮合动态刚度、传递误差、齿侧间隙等多种非线性因素的直齿圆柱齿轮系统非线性动力学分析模型中,将时变啮合刚度按5次谐波展开,齿侧间隙按3次多项式拟合,运用多尺度法对该模型进行了分析,推导了系统主共振和谐波共振响应下的频率响应方程,绘制了相应的频率响应曲线,分析了系统中的静态栽荷和动态栽荷以及阻尼对谐振响应幅值和频率的不同影响作用。     

用静态传递误差法进行高速宽斜齿轮振动分析

本文在微机上建立并求解了渐开线宽斜齿轮单自由度非线性力学模型和动力学方程，编制了计算轮齿动载荷和动载系数的计算机程序。并将静态传递误差引入齿轮振动微分方程的求解中，为今后进一步进行宽斜齿轮的动态优化设计打下了基础     

加工误差和变形作用下的误差传递模型研究

针对零件加工误差和变形误差对装配误差的耦合影响问题,研究了一种采用小位移旋量(Small Displacement Tor-sors,SDT)、齐次坐标变换理论建立的包含零件加工误差和变形误差的装配误差传递模型.首先,分析了两零件配合时由于零件加工误差和变形误差造成的装配误差.其次,对零件配合面点云数据和ANSYS分析的变形节点数据进行拟合.最后,采用SDT和齐次坐标变换理论建立装配误差传递模型.结果表明,通过该模型计算出的装配误差与真实装配情况一致,为误差控制、装配体末端误差预测以及关键误差源的识别提供了理论基础.     

某地铁车Tc1振动特性及振动传递分析

为研究某地铁车Tc1振动特性及振动传递,对该地铁车进行了线路振动模态试验。首先提取60 km/h下稳态30 s振动加速度,利用Test.Lab软件识别了车体及构架工作模态参数,然后在时域方面以6 s的时间段确定平均最大值和有效值,对该地铁车的动力学性能进行了评价。频域方面利用振动加速度频谱图的峰值点确定车辆振动主频。最后计算了各频段下由轴箱到构架、构架到车体的频域传递率。结果表明,该车辆的轴箱悬挂系统对高频振动具较好减振效果,空簧悬挂系统对低频振动有很好的减振效果。     

Effects of dynamics in gear tooth contact

Investigation of surface contact effects in gears at speed is complificated by dynamic effects. To find true loadings on the contacts in a gear drive it is necessary to measure transmission error and then model the gearbox dynamics. This allows prediction of tooth loads and contact times and gives the bearing vibration forces which excite the gearcase and its supports to radiate noise     

Influence of tooth modifications on tooth contact in face-hobbed spiral bevel gears

In this study the influence of tooth modifications induced by machine tool setting and head-cutter profile variations on tooth contact characteristics in face-hobbed spiral bevel gears is investigated. The concept of face-hobbed spiral bevel gear generation by an imaginary generating crown gear is applied. The modifications of tooth surfaces are introduced into the teeth of both members. The lengthwise crowning of teeth is achieved by applying a slightly bigger radius of lengthwise tooth flank curvature of the crown gear generating the concave side of pinion/gear tooth-surfaces, and by the variation of machine tool settings in the generation of pinion/gear teeth. The ease-off in the tooth height direction of meshing tooth surfaces is achieved by applying a head-cutter whose profile consists of two circular arcs, instead of a straight-line. The method of tooth contact analysis applied determines the path of contact, the potential contact lines, the separations along these lines, and the transmission errors. A computer program implements the method. By using this program the influence of the variation of machine tool settings and of head-cutter geometry on tooth contact is investigated and discussed.     

准双曲面齿轮啮齿仿真与齿面接触分析

为了检验准双曲面齿轮的加工设计参数,研究采用三维几何仿真方法模拟理想齿轮的啮合过程.在切削过程建模的基础上,给出啮齿过程的接触点仿真算法,并生成齿面接触轨迹和几何接触区.结合实例,将仿真结果与理论结果、格里森软件的计算结果进行对比,证明仿真方法的有效性.系统以Solidworks软件平台进行二次开发,建立了加工设计与齿轮整体分析之间的联系,为齿轮参数优化提供参考.     

Modeling of helical gear contact with tooth deflection

The majority of gear tribological studies are made on spur gears. However, helical gears are generally used in industry, and their contact behavior deserves more attention to establish a realistic base for detailed friction, wear and life studies. This study focuses on the modeling of helical gear contact with tooth deflection. A calculation model for helical gear contact analysis is introduced. Helical gear surface profiles are constructed from gear tool geometry by simulating the hobbing process. The model uses three-dimensional finite elements for the calculation of tooth deflection including tooth bending, shearing and tooth foundation flexibility. The model combines contact analysis with structural analysis to avoid large meshes. Tooth foundation flexibility was found to have an essential role in contact load sharing between the meshing teeth, whereas contact flexibility plays only a minor role. The capability of different local contact calculation methods was also studied.     

回转复合振动圆频率测试及误差分析

介绍了用回转复合振动综合参数测试仪进行周向振动激振驱动器圆频率测试的工作原理,构建了简单易行的测试系统,测得了激振驱动器的实际周向振动圆频率,找出了周向振动圆频率与变频器输出频率之间的关系,分析了产生误差的主要原因,提出了解改进的措施。     

啮合线齿廓偏差测量方法

介绍了一种应用于齿轮测量中心上复杂齿廓测量的新方法——啮合线齿廓测量法。该方法减小了测头在X轴方向上运动距离,有效地保证了精度范围,同时减小测头重力中心的运动及测量时间,实现了高精度测量。该方法能够有效防止齿廓基圆测量法在进行内齿轮测量时的干涉现象,同时实现小直径内齿轮(外圆直径小于10mm)的一次装卡完成齿形、齿向和齿距误差测量。     

大型齿轮齿形误差信号的采集与分析软件

简单介绍了大型齿轮在机测量仪的专用测量软件中关于齿形误差信号的采集和分析软件的结构和功能,并举例说明了软件计算精度可靠,证明了在机测量原理正确,误差分析结果对工艺调整具有重要指导意义。     

齿圈径向跳动测量误差分析及处理

分析齿圈径向跳动测量原理及其影响测量误差的各种因素,运用随机误差理论分析和处理这些误差.     

齿轮传递误差计算的分析

齿轮传动系统是精密传动机械的重要组成部分,齿轮传动误差对其精密性有着重要影响.在阗述引起齿轮传动误差的原因和齿轮传动误差的综合方法的基础上,研究了齿轮系统传动误差计算中的几种主要计算方法(绝对值法、概率法和蒙特卡洛法)在计算齿轮传动误差中的优劣,最后结合冲槽机的二级传动齿轮对上述三种方法进行了对比计算,通过计算结果可以...     

谐波齿轮传动系统传动误差的精细分析

分析输出刚轮切向综合误差和基节误差等多项重要误差源对传动误差的贡献及其频率,采用按随机过程理论得 到的误差平均因子和单位换算系统,建立统一的较全面反映各种误差因素的单台具有杯形或环形柔轮的谐波齿轮传动 装置的传动误差计算公式,按6σ原则,导出一批谐波齿轮传动装置的传动精度统计公式。它们可分别应用于具有杯形 或环形柔轮的谐波齿轮传动的精度评估,或应用于非线性动力学研究中传动误差环节的建模。     

变齿厚斜齿轮传动齿面接触数学模型的建立

变齿厚斜齿轮传动综合了斜齿轮和变位齿轮传动的优点,为保证平行轴变齿厚斜齿轮接触良好,传动可靠,应对设计的齿轮对进行齿面接触分析.根据设计的待加工齿轮参数,确定小、大齿轮的齿面方程,建立其接触的数学模型,进而对标准安装以及存在安装误差的齿面接触情况进行研究,为接触有限元分析及制造加工奠定理论基础.     

Ultra-low-flying-height design from the viewpoint of contact vibration

The design of a head-disk interface for ultra-low flying height has been studied from the viewpoint of contact vibration. It is known that a super-smooth disk is necessary for a slider to fly at an ultra-low flying height; however, such a disk increases the friction force, which potentially increases the vibration of the slider. To solve this problem, the head-disk interface must be optimized to reduce this increased vibration. It has been shown that a large pitch angle and center-pad-mounted read/write elements have advantages in terms of slider/disk contact. It has also been found that a micro-texture on the air bearing surface can prevent contact vibration. Moreover, a frequency-shift-damping slider was found to damp the vibration effectively. To further investigate these findings, numerical simulation and modeling of slider dynamics during contact have been performed. Their results revealed two zones of contact vibration: a stable zone and an unstable zone.     

基于齿面接触强度和齿根弯曲强度的齿轮可靠性设计方法

探讨了圆柱齿轮的可靠性设计方法，可以定量地给出齿轮的可靠度和根据可靠度对齿轮进行可靠性设计，是对齿轮可靠性问题研究的一次重要探索。通过对实例的设计计算，表明其结果与实际运行情况吻合。说明该计算方法是一种行之有效的方法。     

Plane-cylindrical transmission with a linear-localized contact

The design and calculation of plane-cylindrical transmissions by means of implicit functions permits the manufacture of such transmissions with linear-localized contact. The corresponding design documentation has been developed.     

中心齿轮齿形的圆弧替代及误差分析

以MATLAB6．1为平台,提出用圆弧齿形替代中心齿轮理论齿形的优化设计方法,并对由此产生的径向误差进行分析。