Riccati传递矩阵法在高速精纺锭子临界转速分析中的应用

Riccati传递矩阵法能有效地克服传统的传递矩阵法存在的数值不稳定现象,适用于结构复杂、转速高、支承多的转子动力学问题。本文简要介绍了Riccati传递矩阵法并将其应用于高速精纺锭子临界转速的分析计算,所得计算结果与其他计算方法及实测结果作了比较,结果相当接近。     

精密车床主轴回转误差的测试与补偿

文中介绍了精密车床主轴回转误差的一种补偿系统及补偿刀架结构,可以提高被加工件的圆度。实验表明,主轴转速为485 r/min 下,工件圆度误差由原来的1～1.7μm 减少到0.4～0.8μm,即补偿掉了40%～67%.文中还介绍了一种主轴回转误差的综合误关差计算机辅助测试系统,可绘制出径向、摆角、轴向3种回转误差的误差曲线图和误差频谱图,并打印出误差值、相关系数等。     

机床主轴的模糊可靠性设计

针对机床主轴常规设计不考虑设计参数的随机性和模糊性 ,本文将模糊可靠性引入到机床主轴设计中 ,提出将传统刚度校核中的许用变形量用模糊量代替 ,推导了机床主轴模糊可靠度的计算公式 ,且计算实例的结果表明对机床主轴进行模糊可靠性设计更能体现实际情况 ,可靠度的计算更趋合理。     

主轴系统支承六参数识别

本文提出了支承六参数识别原理。根据激振试验所获得的动柔度,便可求得轴承参数(径向刚度、径向阻尼、角刚度、角阻尼)。     

考虑间隙时轧钢机万向接轴的受力分析

本文对存在间隙时万向接轴的载荷分布进行了分析，确定作用在叉头和扁头上的合力作用点，为提高万向接轴寿命提供了途径和理论依据，实践验证了分析结果的正确。     

十字轴万向联轴器轴承盖裂纹的研究

针对某热轧厂R3轧机的分体式十字轴万向联轴器的轴承盖出现裂纹的现象，用有限元程序Alsor对叉头和轴承盖的强度进行了分析。根据理论分析和实验研究的结果，对该万向联轴器的改造及轧机的操作、维护提出了相应的建议。     

AN OPTIMAL DESIGN OF RING SPINNING SPINDLES USING PROGRAM SAP84

In this paper, natural frequencies and vibration modes of spindl D1203 are calculated by us-ing structural analysis program SAP84. It is found that the second natural frequency of D1203spindle is too close to the range of working speed. In order to raise the second natural frequencyand to reduce the vibration noise, simple optimal design of several structural parameters are alsodiscussed by means of the orthogonal design method. It is shown that the better design is toshorten the length of the spindle blade appropriately and to increase the elasticity of its uppersupport.     

高速低噪声锭子

本文研制了一种双弹性支承的高速低噪声锭子。上轴承支承的弹性系数根据有限元分析来确定,弹性支承形式采用橡胶吸振圈,橡胶吸振圈的参数设计满足弹性系数的要求,该双弹性支承锭子适宜于高速且噪声低,已获高速低噪声锭子中国专利。     

Design and Performance Analysis of Small Denture Machining Equipment

The research and application on small denture machining equipment are great breakthrough for modern dental restoration technology.In this paper,a small denture machining equipment made of two spindles with four-axis was designed based on machining characteristics and functional analysis.Position accuracy and re-position accuracy were measured by accuracy instrument.In order to test its machining capacity,some typical microstructure parts,such as straight channel,hemispherical surface,and molars coronal,were selected for high speed milling.It was obtained that the denture machining equipment met the machining requirements with high quality and efficiency,according to the acquisition and analysis of form and position errors,surface roughness,and 3-D profile.     

电阻式纺锭轴承内径测量仪的研制

本文介绍了一种新研制的电阻式纺锭轴承测量仪,对其测量原理及测量精度进行了分析,证明可以代替传统的手用塞规。通过非电量电测法连续、精确地测定纺锭轴承的内径尺寸,对改善现行的纺锭轴承测量、检验以及研究其最佳工作间隙、工作状态、使用中的磨损状况,有重要意义。