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重型落地铣镗床主轴轴承组件,通常采用精密主轴轴承,以确保主轴回转精度高、刚性好、寿命长、噪声低、精度保持性好等基本要求.因此,在安装主轴轴承时,只有根据实际情况进行合理的选配,才能保证主轴的安装要求.文中主要介绍了重型落地铣镗床主轴轴承的选配方法和原则. 相似文献
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本文论述了落地铣镗床在机械加工领域得到了广泛应用,并结合AFl30型自动落地铣镗床的主运动设计过程,详细的给出了此类机床主轴进给丝杠的计算、校核步骤,对以后此类机床主运动设计具有重大的指导意义。 相似文献
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铣镗床高速主轴作为机床的核心部件,直接影响机床的工作效率和工作性能。分别运用SolidWorks建模软件和ANSYS软件对TK6916数控铣镗床高速主轴结构进行运动学及静力学分析,以获取其刚度,并进行优化设计。 相似文献
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为了提高数控落地铣镗床主轴箱静、动、热态综合性能,主轴箱必须具有良好的结构特性。利用Pro/E和ANSYS建立了主轴箱的有限元模型,分别进行模态分析和热一力耦合分析,以主轴箱结构关键尺寸为设计变量,以主轴箱的一阶固有频率、质量、最大耦合应力、最大耦合变形为目标函数进行了对目标正交优化设计。利用灰色关联分析法获得了优化设计的最佳解,可为主轴箱的结构设计提供参考。 相似文献
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为更精密地对机床主轴热误差进行预测,对主轴温度场和热变形进行机理分析,提出用热特性基本单元试验对初步理论模型进行修正从而得到最终模型的建模方法。根据主轴的尺寸和轴承参数对主轴温度场和热变形进行机理分析并确定初步理论模型,在不同起始温度下进行两组热特性基本单元试验,试验中采用温度传感器对主轴前后轴承及前端面的温度进行测量,采用位移传感器对主轴轴向热变形进行测量,得到主轴在升温和降温过程中温度场和热变形的特性数据,基于该数据对初步理论模型进行修正。在一台数控车床主轴上进行模型的试验验证,结果表明:该建模方法能同时对主轴升温和降温过程进行温度场和热变形的建模与预测,且具有高精度的优点,可用于各种数控机床主轴热变形的预测。 相似文献
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In a recent paper, the Ritz method with simple algebraic polynomials as trial functions was used to obtain an eigenvalue equation for the free vibration of a class of homogeneous solids with cavities. The method presented is here extended to the study of a class of non-homogeneous solids, in which each solid is composed of a number of isotropic layers with different material properties. The Cartesian coordinate system is used to describe the geometry of the solid which is modelled by means of a segment bounded by the yz, zx and xy orthogonal coordinate planes and by two curved surfaces which are defined by fairly general polynomial expressions in the coordinates x, y and z. The surface representing the interface between two material layers in the solid is also described by a polynomial expression in the coordinates x, y and z. In order to demonstrate the accuracy of the approach, natural frequencies are given for both a two- and three-layered spherical shell and for a homogeneous hollow cylinder, as computed using the present approach, and are compared with those obtained using an exact solution. Results are then given for a number of two- and three-layered cylinders and, to demonstrate the versatility of the approach, natural frequencies are given for a five-layered cantilevered beam with a central circular hole as well as for a number of composite solids of more general shape. 相似文献
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通过分析膨胀套在实际使用产生滑移受阻现象、卡死现象原因的实质,并在分析产生问题原因的基础上提出了改进措施即:增加导向机构。 相似文献
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设计了磨粉机快辊轴承座的加工工艺和具体的工装夹具.利用卧式加工中心加工磨粉机快辊轴承座,辅以能够高效快速夹紧的夹具,既可以保证加工精度,又能够提高加工效率. 相似文献
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一种涡旋压缩机径向随变机构的设计 总被引:1,自引:0,他引:1
详细介绍了运用随变原理设计的一种新型径向密封机构的结构特点,工作原理及主要参数的确定方法,该机构可补偿由于涡旋体加工精度不高而造成的功率损失,适用于涡旋压缩机的批量生产。 相似文献
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V. P. Dragunov E. G. Kostsov 《Optoelectronics, Instrumentation and Data Processing》2009,45(3):234-242
Specific features of operation of one- and two-capacitor microelectromechanical converters (MEMC) of energy of mechanical microscopic vibrations into electric energy with a modulated electrode-gap magnitude and with allowance for the mutual influence of electrical and elastic forces are analyzed, and the characteristics of these two devices are compared. The main factors restricting the increase in MEMC power are demonstrated to be the effects of “collapsing” and the condition of conservation of positive rigidity of the system. Expressions for estimating the limiting MEMC parameters are derived. The possibility of electrical energy generation in the presence of “real“ sources of wide-spectrum microscopic vibrations is considered. 相似文献
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针对目前市场对工业设计人才的需求,本文论述了我校在工业设计教育方面的改革措施,着重介绍了我校工业设计教育在软件和硬件方面所进行的一系列的改革。 相似文献
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