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微细电火花加工中放电参数高速采集系统的研究 总被引:3,自引:0,他引:3
设计了一个用于微细电火花加工控制中放电参数检测的高速数据采集系统,对其硬件电路进行了分析和讨论,并给出了软件说明。 相似文献
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电火花加工的放电蚀除过程是在极短时间内和极微小空间内发生的,导致用观测和理论分析的方法进行研究都极其困难,因此其放电蚀除机理至今仍未能被明确的解释.论文应用分子动力学方法对微细电火花加工的放电蚀除过程和熔融区的形成及形状等进行了模拟研究,该研究基于放电通道变化的热源模型,并与放电通道恒定情况下的模拟结果进行了对比,证明... 相似文献
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绝缘体的电火花加工技术 总被引:1,自引:1,他引:1
介绍了对绝缘体实施电火花加工的基本原理,以及绝缘体型腔的EDM和绝缘板的WEDM的加工装置。并对绝缘体电火花加工的工艺特性及影响因素进行了分析,最后对绝缘体电火花加工的结果和应用前景作了简单说明。 相似文献
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This paper describes an investigation on factors determining the limits of the minimum machinable diameter of micro rods obtained by micro EDM. Possible factors which influence the limits are discharge crater size, depth of heat affected zone, residual stress, and material micro-structure. In this paper, the influences of residual stress and material micro-structure were especially examined. For the negative effects of residual stress, both residual stress already present prior to machining and residual stress generated by machining itself were investigated using tungsten and cemented tungsten carbide as micro-rod workpiece materials. To determine the effects of material micro-structure, the influence of tungsten carbide grain size on the limits of minimum machinable diameter of cemented tungsten carbide rods was investigated. Comparing the limits between poly-crystal tungsten and mono-crystal tungsten, it was found that micro-machining characteristics were affected significantly by the anisotropy of the mono-crystal tungsten. 相似文献
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SeongMin Son HanSeok Lim A.S. Kumar M. Rahman 《Journal of Materials Processing Technology》2007,190(1-3):73-76
Micro EDM is one of the most powerful technologies which are capable of fabricating micro-structure. However, there are many operating parameters that affect the micro EDM process. Since the EDM is basically a thermal process, the supplying electrical condition can be an important factor. The conditions generally consist of several parameters such as electrical current, voltage, pulse duration, spark gap, and others. Those are decisive in removal rate, wear rate, and machining accuracy, which are characteristics of EDM. In this study, the influences of EDM pulse condition on the micro EDM properties were investigated. Voltage, current, and on/off time of the pulse were selected as experimental parameters based on a simple equation for the material removal rate. The pulse condition is particularly focused on the pulse duration and the ratio of off-time to on-time, and the machining properties are reported on tool wear, material removal rate, and machining accuracy. The experimental results show that the voltage and current of the pulse exert strongly to the machining properties and the shorter EDM pulse is more efficient to make a precision part with a higher material removal rate. 相似文献
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研制了高性能柔性化多轴联动电火花加工数控系统,论述了数控系统的软、硬件结构。蘸件采用PC前端和高速I/O平台的结构,使用先进的在线可编程逻辑器件进行电路设计,因此数控系统具有开放式结构和全软件化、柔性化及模块化的特点。通过加工实例说明了多轴联动数控系统对于空问曲面零件加工的灵活性、便易性和应用方便性。 相似文献
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介绍了2014年我国电加工行业重点生产企业的经营情况,分析了我国电加工机床近年来的总体经营走向。从创新驱动、质量为先、绿色发展、结构优化、人才为本5个方面,对中国电加工2025做了一些思考。 相似文献
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叙述了电火花成型加工中存在的一些问题,介绍了瑞士夏米尔技术公司开发的DS系统工作原理及工艺特点 ,可为从事电火花成型加工专业人员进行深入研究提供参考 相似文献
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一种 45 钢表面电火花沉积 WC 层的新方法 总被引:2,自引:1,他引:2
目的提出一种利用高速电火花小孔加工机床实现工件表面强化的新方法。方法基于电火花沉积理论,通过改变机床电极的极性,在45钢表面电火花沉积WC层,从沉积层的厚度、粗糙度和微观缺陷三个方面分析电流和脉宽对沉积层质量的影响。结果当脉宽为80μs,电流为7 A时,获得的沉积层厚为35μm,硬度达1000HV,无明显缺陷。结论 D703F高速电火花小孔加工机床更换极性后,能够进行表面沉积,适当调整工艺参数可以实现空气中放电沉积,并获得理想的沉积层。 相似文献