共查询到20条相似文献,搜索用时 62 毫秒
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提出了一种新复合微细电火花加工方法,通过工件的微幅激振改善加工条件,提高放电加工脉冲利用率和微细孔加工的深径比。介绍了实验装置的构成,并给出了初步试验结果。 相似文献
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概述了难加工材料零件打孔的几种主要工艺方法,提出此类材料小孔、深小孔加工的一种新电解电火花复合加工试验方法.在改造的试验装置上,采用复合型电解液在不锈钢、钛合金试件上进行了小孔、深小孔加工试验.分析了生产率、表面粗糙度和加工精度等工艺效果的成因.结果表明,通过合理进行电解液配制和选择电规准等相关工艺参数,试件的材料去除率达14 mm/min,表面粗糙度值Ra <7.9 μm.虽然加工精度低于电火花加工精度,仍验证了该方法用于钛合金试件打孔的有效性. 相似文献
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介绍某高精度航空发动机燃烧室复层气膜孔的电火花加工技术.通过采用RD1-A型多电极数控电火花加工机床,优选EDM参数,有效地提高了气膜孔的加工质量和效率. 相似文献
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Sequential Laser and EDM Micro-drilling for Next Generation Fuel Injection Nozzle Manufacture 总被引:1,自引:0,他引:1
High quality holes of diameters less than 145 μm are required for the manufacture of next generation diesel fuel injection nozzles for improved combustion efficiency and reduction of emission to the environment. The current practice of using electro-discharge machining (EDM) drilling of fuel injection nozzles is limited in terms of the hole size it can produce effectively and the length of time needed to drill. In addition, the tooling cost is high. This paper reports on an investigation into a sequential laser and EDM micro-drilling technique for the manufacture of next generation fuel injection nozzles. A laser-drilled pilot hole is rimmed out by EDM drilling. It was found that this hybrid process has eliminated the problems of recast and heat affected zones typically associated with the laser drilling process. The new process has enabled a 70% reduction in total drilling time compared to standard EDM drilling as less material is removed by the EDM. The quality of the holes is as good as direct EDM drilling, thus eliminating the need for re-certification of the drilling process. Various combinations of laser/EDM drilling conditions have been examined. Optimum diameters for the pilot hole and the EDM electrode have been identified for a particular diameter of fuel injection nozzle, giving the minimum total drilling time and the best quality holes. A special system was designed to enable the alignment of nozzles to be controlled to within ± 20 μm. The technique has enabled valuable cost savings and increase in production capacity for next generation fuel injection nozzle manufacture. 相似文献
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直线电动机驱动的电火花加工机床的性能 总被引:1,自引:0,他引:1
介绍了日本沙迪克公司开发的采用直线电动机的电火花成形加工机的高灵敏度响应和高速抬刀性能 ,并与旋转电动机方式进行了对比试验。结果表明 ,直线电动机方式定位控制精度高、抬刀速度快、排屑效果好 ,能更有效防止短路发生 ,因而能提高加工速度和加工效率。 相似文献
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介绍了电解加工的基本原理及其加工工艺优点 ,阐述了ECM(电化学溶解及电火花熔蚀)/EDM(电火花放电腐蚀成型)复合加工过程 ,以及国外深小孔ECM/EDM复合加工的发展现状 相似文献
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为了提高硅晶体电火花成形加工效率、降低电极损耗,采用丙三醇水溶液作为工作介质。分析了介质中的碳、氢、氧元素对加工效果的影响,以及电导率、粘度、介质成分对加工特性的影响,研究表明:击穿放电间隙受电导率与粘度的影响,丙三醇水溶液可提高放电间隙,增强加工稳定性;丙三醇分子会在放电高温下分解出碳分子,其自身的微观爆炸力可促使碳分子和极间蚀除产物向两极移动,增强了电极的涂覆效应,降低了电极损耗。工艺实验结果表明:丙三醇水溶液的加工特性优于去离子水,采用质量分数为30%的丙三醇溶液加工时的最佳占空比为1∶7,加工效率为11.88 mm~3/min,电极损耗比为3.7%。 相似文献
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文章提出一种用简单形状电极加工成型形状零件的方法.基于Pro/E软件进行理论分析,并在舌勺形状零件上进行试验,采用简单的圆柱形状电极,舌勺形状加工误差影响为:针头在针身上的位置误差影响>电极和针头的相对位置影响>电极形状误差影响.分析结果表明:提出的先制舌后弯钩工艺是合理的,为微细异形零件加工提供了借鉴. 相似文献