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本文综合叙述了目前国内外数控机床控温冷却系统的研究与应用情况,对各种技术及产品做了综合性评价,并指出了机床温控技术的研究发展方向. 相似文献
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This paper presents the results of a research into capacitor discharge percussion welding (CDPW) of pure aluminum wires and pure copper sheets, using percussion welding power and special welding device. A lot of CDPW factors, which will affect aluminum and copper dissimilar bonding, are described and these parameters have also been optimized. The fracture pull, inter'ace compounds, microstructure and hardness are all studied. The results show that aluminum wire welding to copper sheet can form a sound weld and in some conditions the fracture pull is similar to that of the pure aluminum wires. The capacitance, discharge voltage, wire taper angle and machine oil as welding assistant medium affect fracture pull. The intermetallic compounds Al2 Cu appears on the copper side of joint. Narrower heat-affected zone is observed. 相似文献
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通信控制处理装置(GGP)在DIPS系统中主要用作前置处理装置。通过线路和各种终端及异机种计算机通信时,用它来进行必要的传输控制。 本文要阐述它的硬件及维护测试程序的设计目标及选择方式,并概要说明它各部份的功能及组成。GGP的设计目标是要能有效地架接从50b/s到240kb/s的各种速率的线路,从硬件来说,它最多可以架接200b/s的线路512条。在其本体部份,具有面向通信控制的专用指令及通用指令,可以进行文电处理。在线路接续部份,用MOS/LSI来执行串并转换等功能,以此来谋求设备的经济性。它能按照高级传输控制规程和计算机及终端进行通信,它也具有和数字数据交换网的接口功能。 相似文献
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