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基于中径和预紧摩擦力匹配的导轨副装配研究 被引量:1
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作者 俞福春 欧屹 +1 位作者 王凯 冯虎田 《组合机床与自动化加工技术》 北大核心 2021年第6期109-115,共7页
为实现滚珠直线导轨副的高效装配,提出快速测量滚道中径参数计算预紧摩擦力的方法。首先分析导轨副的滑块和导轨滚道的中径偏差、滚珠直径偏差与接触角、滚道间距的关系,建立导轨副滚道中径偏差与滚道间距的关系模型;其次根据变形接触... 为实现滚珠直线导轨副的高效装配,提出快速测量滚道中径参数计算预紧摩擦力的方法。首先分析导轨副的滑块和导轨滚道的中径偏差、滚珠直径偏差与接触角、滚道间距的关系,建立导轨副滚道中径偏差与滚道间距的关系模型;其次根据变形接触理论研究滚道中径偏差对导轨副预紧摩擦力的影响;然后设计导轨副中径检测系统测量滚道中径,利用预紧摩擦力测量系统测量导轨副中径偏差和滚珠直径偏差影响下的预紧摩擦力。测量结果与理论的最大偏差为6.89%,精度满足要求。最后对同规格不同批次的导轨和滑块在中径误差测量的基础上完成滚珠匹配,产品的预紧摩擦力都在设计范围内,验证高效装配方案的可行性。 展开更多
关键词 滚珠直线导轨副 高效装配 滚道中径测量 预紧摩擦力
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Chemical Shifts of ^(23)Na in NaCl Crystal Specimens Implanted with Xenon Ions
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作者 LIANG Jia-chang XU Zhou +12 位作者 LE Xiao-yun ZHAO Wei-jiang yu fu-chun LIU Zhi CHEN Rong-ti SUN Xian-ping ZHENG Xi-zhi DU Yo-ru ZHAO Ming-xin SHEN Lian-fang GU Hong-en LI Yi SU Yi 《Chinese Physics Letters》 SCIE CAS CSCD 1999年第8期563-564,共2页
Na clusters containing 10 to less than 1000 metal sodium atoms and blisters containing xenon inclusions were formed in NaCl crystal specimens prepared by xenon ion implantation to single crystal NaCl with Auences more... Na clusters containing 10 to less than 1000 metal sodium atoms and blisters containing xenon inclusions were formed in NaCl crystal specimens prepared by xenon ion implantation to single crystal NaCl with Auences more than or equal to 2×10^(16)/cm^(2)at the energy of 36keV.Experiments indicated that on the condition of xenon ion Auences more than or equal to 1×10^(17)/cm^(2)the xenon inside the inclusions formed in NaCl crystal specimens is in solid state and the solid state molecules NaXe are formed through the Combination of Xe with Na in Na clusters.The chemical shift of ^(23)Na in solid state molecules NaXe relative to 23Na in single crystal NaCl was measured and is equal to-17ppm. 展开更多
关键词 CRYSTAL IMPLANTATION state
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