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本文介绍了分别由三个喇叭(TCl60-0-3-0单喇叭2件)(TCl60-0-2-0双喇叭1件)组合成的天线多模喇叭(TCl60-0-1-0)在生产加工过程中铣削、焊接、装配所需综合工装(J2-000154)的设计要点及结构分析并叙述了在实践中的操作及应用摸索。 相似文献
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工艺诱导电荷所产生的缺陷正在成为造成下一代器件良率损失的问题,促使晶圆加工过程中需要更加严格的工艺控制。 相似文献
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介绍了吲哚及其衍生物的合成方法,进一步对以苯胺及其同系物为原料分别与炔烃、环氧乙烷、乙二醇反应合成吲哚及其衍生物的方法进行了总结,重点阐述了苯胺和乙二醇体系合成吲哚及其衍生物的优缺点,并对反应机理进行了分析汇总。基于文献分析发现,以乙二醇和苯胺合成吲哚的反应机理尚不明确,且存在反应温度较高、催化剂失活严重、收率和选择性有待提高等问题,故进一步提出对以乙二醇和苯胺为原料合成吲哚的反应进行研究,以期在阐明反应机理的基础上实现吲哚的高效合成,为乙二醇的高值转化提供有效途径。 相似文献
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Ultrasound-aided electric discharge machining(EDM) is an emerging technology for producing hollow nickel microspheres.This technology combines traditional EDM with the cavitation and vibration effects of ultrasound to produce hollow microspheres.In this paper,ultrasound-aided EDM was carried out in a kerosene medium(the working solution).The effects of various parameters on the sizes of microspheres were investigated using scanning electronic microscopy(SEM).Smileview software was used to measure the sizes of the microspheres.Originpro software was used for statistical analysis to determine the size distributions of the microspheres.To study the effects of the system parameters on the sizes of the microspheres,we first investigated the necessity of using an ultrasonic wave with EDM.After comparing the experimental results with and without the ultrasonic field,we found that ultrasound-induced cavitation and vibration effects reduced the diameters of the microspheres.We then studied the effects of several electrical parameters,including the arc current,pulse width,and gap voltage,on the sizes of the microspheres at an ultrasound frequency of 40 kHz.Smaller microspheres could be obtained by lowering the arc current,pulse width,and gap voltage. 相似文献
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目前,公开报道的切削工艺模拟研究中,大多数停留:在二维模拟上,而且是将工件约束,让刀具做直线进给运动,这样实际生产中工件或刀具的回转运动对切削加工过程的影响并没有体现出来。一般柱形件加工时工件做回转运动,刀具做进给运动,需采用更新的Lagrange网格来模拟三维的具有螺旋形运动轨迹的非正交切削。 相似文献