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摩擦在工作台快、慢速传动中的应用机床工作台通常具有快、慢速两种操作方式,以满足快速趋近慢速到达精确位置的操作要求。笔者设计了附图所示的用摩擦环节实现不同传动速度的变换。快速传动时,操作者摇动手轮,通过一对齿轮2、3传动,使丝杆9旋转,带动台面移动。慢... 相似文献
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直线滚动导轨精度特点分析与研究 总被引:1,自引:0,他引:1
直线滚动导轨精度特点分析与研究上海市冶矿机械技术研究所庞诚关键词直线,导轨,误差均化效应“模具标准件专用多轴座标镗床”是1989年上海市十四项技术改造重点项目之一中的一个分项目。该镗床的几个主要精度指标达到精密座标镗床的要求。该镗床在结构设计方面的一... 相似文献
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An interposer test vehicle with TSVs(through-silicon vias) and two redistribute layers(RDLs) on the top side for 2.5D integration was fabricated and high-frequency interconnections were designed in the form of coplanar waveguide(CPW) and micro strip line(MSL) structures. The signal transmission structures were modeled and simulated in a 3D EM tool to estimate the S-parameters. The measurements were carried out using the vector network analyzer(VNA). The simulated results of the transmission lines on the surface of the interposer without TSVs showed good agreement with the simulated results, while the transmission structures with TSVs showed significant offset between simulation and test results. The parameters of the transmission structures were changed,and the results were also presented and discussed in this paper. 相似文献
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近年来,随着社会的发展,大中城市中的高层建筑所占的比例越来越大,然而高层建筑的给排水的施工技术一直在总体的建筑中起着非常重要的作用.不容忽视.本文结合作者的施工经验,主要介绍了建筑工程中给排水施工过程中的质量控制措施,可供同行参考学习。 相似文献
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