共查询到19条相似文献,搜索用时 109 毫秒
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电火花加工放电点位置在线检测的研究进展 总被引:2,自引:0,他引:2
电火花加工放电点位置的在线检测是一个较新的研究方向,国际上近几年来在这方面已经有了一些研究成果。目前所采用的方法主要有声波信号检测法和电信号检测法两类。电信号检测法又包括分割电极法,分割电流法,电位差法和霍尔元件法4种。本文介绍了各种检测方法,并讨论了各自的优缺点。 相似文献
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电火花放电间隙状态检测模块的设计 总被引:5,自引:0,他引:5
本文设计的电火花放电间隙状态检测模块地间隙电压、电流及前一个间隙状态的判断,能够即时区分种放电间隙状态,并通过对一段时间内出现某间隙状态的时间进行累计,来检测该间隙状态的发生率。上墓愉还对间隙平均电压、峰值平均电压进行了检测。 相似文献
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推导了圆电极下表面二维EDM放电位置与电位差的关系式,仿真研究了两点输入情况下利用电位差检测放电位置的方法。 相似文献
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HiroyukiHoshino HiromitsuMurakami HideoYokota SatoshiSuda HidekiTsuge KoichiTerasaka ToshiakiWakabayashi 《材料热处理学报》2004,25(5):475-479
In quenching, the cooling uniformity is most important to diminish distortion occurring on work pieces. As a trial to accomplish uniform cooling, therefore, there exist various mixing methods of a quenchant and the quenchant circulation with an external pump has so far been the well accepted mixing method. However, this study proposes an advanced oscillation mixing method that can improve more the cooling uniformity in quenching. The proposed method includes a stirrer in oscillating motion, so that the simultaneous oscillating and mixing movements of the stirrer are considered to provide efecfively the uniform cooling characteristics for the quenchant. In comparison with the case of the circulation pump mixing, the investigation using the oscillation mixing method has demonstrated the following two experimental facts:(1) the short vapor blanket stage caused by the quick breakage of the oil vapor blanket and (2) the reduced variation of the quenching distortion. 相似文献
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基于正交试验的电火花加工工艺效果试验分析 总被引:2,自引:0,他引:2
通过正交试验分析,探讨了电火花成形加工中影响加工效果的主要因素,分别阐述了脉冲峰值电流、脉冲宽度及脉冲间隔等对加工速度、加工表面粗糙度及工具电极损耗的影响关系,对解决电火花加工实践中工艺参数优化问题具有一定的理论指导意义. 相似文献
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Subhadarshi Nayak Jyoti Agrawal 《JOM Journal of the Minerals, Metals and Materials Society》2012,64(3):393-399
ScienceTomorrow is developing a high-speed, low-cost process for synthesizing high-porosity electrodes for electrochemical double-layer capacitors. Four types of coal (lignite, subbituminous, bituminous, and anthracite) were used as precursor materials for spark discharge activation with multiscale porous structure. The final porosity and pore distribution depended, among other factors, on precursor type. The high gas content in low-grade carbon resulted in mechanical disintegration, whereas high capacitance was attained in higher-grade coal. The properties, including capacitance, mechanical robustness, and internal conductivity, were excellent when the cost is taken into consideration. 相似文献
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