共查询到20条相似文献,搜索用时 78 毫秒
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高精度内圆磨床采用了运行精度高、摩擦因数低、产生热变形小的液体静压导轨;作为磨床可移动部件与固定部件间的重要结合部分,液体静压导轨的刚度特性对磨床结构动态特性有着不可忽视的影响;介绍了液体静压支承的基本原理,计算了高精度内圆磨床进给系统采用液体静压闭式导轨对置油垫的刚度,并借助Matlab软件分析对置油垫刚度随供油压力、主油膜厚度、油腔宽度以及总间隙变化的规律,为液体静压导轨的刚度调整提供了理论依据。 相似文献
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一、概述定量供油静压支承(轴承、导轨)是依靠恒定的流量来调节支承油腔的压力,以适应载荷的变化。这种恒流调压系统与定压供油节流调压系统比较,具有工作可靠、发热量小及支承油膜刚度稳定等优点。因此,受到人们的普遍重视。目前,静压支承所采用的定量供油系统多为多头泵或多头齿轮分油器,由于其结构复杂,加工精度要求高,以及价格昂贵等,限制了它的广泛应用。 相似文献
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针对现有的重型立式车床中存在的升降传动问题,探讨超重型立式车床的横梁升降机构所采用的静压丝杆螺母的设计及制造工艺,以减少传动系统的摩擦和磨损,提高机床运动精度和传动效率,详细介绍了丝杆螺母的设计与计算,在加工工艺中还从多个方面保证了产品的制造精度,经过定量叶片泵和变量叶片泵的验证实验,还对制造结果进行了讨论与分析,对存在的问题提出了有效的解决办法。 相似文献
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以12 m激光滚珠丝杠行程测量仪中所用的花岗石床身(长14.5 m)为例,介绍了超长精密花岗石导轨在精研加工过程中的关键工序——直线度检测、探索温度变化对直线度的影响、加工方法,以期能够对其他有类似导轨的加工有借鉴意义. 相似文献
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The journal high stiffness bearings (HSBs) presented in this paper have been supplemented with special regulation systems that enable us to select optimal bearing characteristics by a slight circumferential turn of the journal bearing bush with respect to its fixed casing. The regulation system allows us to obtain the desired bearing characteristic compensating for the inaccuracy of its element production. Two different regulation systems are presented in this paper. The experimental investigations for static conditions of a single HSB with two above-mentioned regulation systems have been performed. Then, two spindles equipped with journal HSBs have been investigated. Each spindle was supported using two HSBs with the same regulation system. The results of these investigations for different rotational frequencies are reported. The effectiveness of the HSB regulation systems for practical optimization of the spindle characteristic have been shown. These bearings can be applied in precision grinding machines. 相似文献
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静态MC方法在公差分析中的三种用法 总被引:1,自引:0,他引:1
蒙特卡罗(Monte Carlo,MC)方法是一种用于仿真计算的随机模拟方法,静态蒙特卡罗方法简单易用,比较适合于用计算机模拟来解决公差分析这样的随机问题。论述计算机辅助公差分析中应用静态蒙特卡罗模拟的三种用法,即以样本矩的估计来计算闭环公差,以样本频率的估计来计算装配成功率,以样本次序统计量的估计来计算满足装配成功率要求的闭环公差,并给出具体的计算示例,说明用静态蒙特卡罗方法解决公差分析问题的可行性。 相似文献
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主要介绍了高精度大流量板式过滤装置的结构、原理及在钢板带轧制工艺过程中的应用.为钢板带轧制的质量提供了有效的保证. 相似文献
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Tomonori Kato Kenji Kawashima Tatsuya Funaki Kotaro Tadano Toshiharu Kagawa 《Precision Engineering》2010,34(1):43-48
Pressure regulators are important elements in pneumatic systems. Relief-type precision pressure regulators are commonly used to control the supply pressure to actively controlled pneumatic vibration isolators.Herein, a high precision, quick response pneumatic pressure regulator is proposed. This consists of an isothermal chamber, a servo valve, a pressure sensor, a quick response laminar flow sensor (QFS), and a pressure differential sensor (PD sensor) as developed by the authors. Slight changes of pressure in the chamber can be detected by the PD sensor and are fed back to the servo valve to maintain the pressure at a desired value. The performance of this regulator was confirmed experimentally in comparison with one available commercially. The regulator was then applied to the supply pressure regulation of an actively controlled pneumatic vibration isolation table. The superior performance of the regulator is clearly shown in the experimental results, especially in terms of avoiding effects from upstream or downstream disturbances. 相似文献
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滚动直线导轨副静刚度模型的研究 总被引:2,自引:0,他引:2
根据滚动直线导轨副的承载特性和结构特点,利用理论力学、弹性力学及其赫兹接触理论等有关方面的知识,对整个滚动直线导轨副的力学性能进行了分析,最终推导出滚动直线导轨副的静刚度力学模型.所得出的刚度模型对提高导轨副刚度、寿命以及结构改进等具有指导意义. 相似文献