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微细电加工要达到工业应用的目的,需兼顾加工效率和加工精度两方面的要求.以微细孔、微细三维结构的加工为目标,进行了微细孔电火花加工、三维微细结构电火花伺服扫描加工及微细电化学加工技术的研究开发.设计出微细电极的损耗补偿进给和导向机构,开发出三维微细结构的电火花伺服扫描加工工艺,研究了采用阵列微细电极的微细电化学加工方法.微细孔电火花加工可连续加工直径小至100 μm的孔.伺服扫描电火花加工可便捷地在小于1 mm2区域内加工出三维微细结构.提出的微细电化学加工技术路线拟将微细电解加工应用于阵列微细孔和三维微细结构的加工. 相似文献
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微细电火花加工实验及工艺规律研究 总被引:1,自引:0,他引:1
微细电火花加工在当前微细加工中显示出巨大的发展潜力。通过用自行研制的微细电火花加工系统进行的一系列微细电欠花加工实验,对影响微细电火花加工加工效率和加工精度的各种因素(如充放电电容、开路电压和工作介质等)进行了研究, 相似文献
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微细阵列方形轴孔的电火花和电化学组合加工工艺研究 总被引:3,自引:1,他引:2
对微细阵列轴孔的电火花、电化学组合加工工艺进行了分析和研究.用微细电火花线切割机加工出3×3至10×10系列方形阵列电极,宽度在25~90 μm, 加工中采用降低加工电压、加工电流、进给速度和减小工作液冲击等方法,获得了质量较好的阵列电极,并分别利用微细电化学加工和微细电火花加工两种工艺方法进行阵列孔加工.在加工过程中通过适度间歇抬刀、超声振动、循环流动工作液等方法,较好地解决了微弧放电、排屑、加工区温度过高等加工难题,获得了质量较好的大小在30~100 μm相应的阵列孔,从而实现了微细阵列轴孔的电火花、电化学组合加工,为大规模微细阵列轴孔的加工开辟了高效、可行的新工艺方法. 相似文献
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《组合机床与自动化加工技术》2017,(11)
为满足石英玻璃等非导电硬脆材料微结构的加工需求,对微细电解电火花铣削加工工艺进行了深入的试验研究,在玻璃工件上进行了一系列微细电解电火花铣削加工工艺试验。首先,基于电解电火花加工的原理搭建了微细电解电火花铣削试验平台;其次,通过对比试验,研究了加工电压、脉冲频率、占空比和进给速度等工艺参数对铣削槽宽的影响,并通过优化工艺参数加工出微槽阵列;最后,成功加工出多个玻璃微结构包括二维微流道和三维微结构,试验结果表明微细电解电火花铣削工艺在加工非导电硬脆材料微结构方面具有很大潜力。 相似文献
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电火花摇动加工微细阵列轴和孔的试验研究 总被引:1,自引:0,他引:1
针对微细阵列轴和孔的电火花加工,提出了利用数控电火花加工机床摇动功能的摇动加工微细阵列轴和孔的方法.此法是基于电火花反拷贝加工的原理,先用丝电极在薄平板(中间电极)上按要加工的阵列轴和孔间距或数倍间距加工阵列小孔(直径0.1 mm以上),然后用加工的薄平板(中间电极)作电极,电火花摇动加工微细阵列轴(电极),最后用此微细阵列电极加工阵列孔.进行了电火花摇动加工微细阵列电极试验,得到了单电极直径为50 μm、长径比为16的3×3阵列电极,并用此电极在70 μm厚的不锈钢板上加工出单孔直径为70 μm的3×3微细阵列孔.试验结果表明,电火花摇动加工方法可实现微细阵列轴和孔的加工. 相似文献
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In micro electrical discharge machining (μEDM), since the discharge energy is very low and is usually performed by a resistor-capacitor (RC) generator the discharge process is highly complex and unpredictable. In addition, due to low discharge energy the discharge is unstable and the machining efficiency is reduced as a result of poor flushing condition in a very small gap. This greatly affects the productivity and limits micro EDM applications. This paper presents development methods to improve the machining efficiency of a widely accepted non-traditional machining process, micro wire electrical discharge machining (WEDM), using non-ultrasonic vibration. It is found that when vibration is applied to the micro-WEDM process, discharge is much more effective with fewer short circuits. From experiment results, it is observed that greater improvement can be achieved when the vibration is applied to the workpiece rather than to the wire. With vibration applied to the workpiece, machining efficiency can be increased by 2.5 times greater than without vibration and 1.5 times compared to the case vibration is applied to the wire. In addition, there exists an optimum relation between vibration parameters, energy and feedrate such that EDM at a constant feedrate can further improve the machining efficiency. 相似文献
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Micro rotational parts are used in several industrial sectors. Well-known applications are micro shafts of gears, ejector
pins in forming tools, pin electrodes for micro electrical discharge drilling or micro stamping dies. Depending on the geometrical
complexity of micro rotational parts different process variants of micro electrical discharge machining characterized by a
rotating work piece can be used: wire electrical discharge grinding (WEDG) with fine wire electrodes, electrical discharge
turning (EDT) with micro structured tool electrode, cylindrical electrical discharge grinding (CEDG) with micro profiled disk
electrode. Characteristic to these process variants is the superimposed relative motion between the rotating electrodes and
the feed. This relative motion can be varied in a wide circumferential velocity range to improve the material removal process.
The paper gives an overview of kinematic and technological restrictions and requirements of the WEDG process influencing the
process behavior with respect to the technological requirements of micromachining. 相似文献
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This paper describes improvement of machining characteristics of electrical discharge machining of deep slots using a tool electrode which has micro holes for jetting dielectric liquid over the working surface. The tool electrode was made by the diffusion bonding of two copper plates, over an interface on which micro grooves for jetting the dielectric fluid were formed using electrolyte jet machining. In conventional machining, it is difficult to drill micro holes at the end of a slim electrode and circulate the dielectric fluid from the other end. Hence a solid tool electrode is used and periodically lifted up during machining to flush debris particles out of the discharge gap. Use of the newly developed tool electrode was found to shorten the processing time and improve machining accuracy significantly compared with the conventional solid tool electrode. Since the holes are micro, the outlet shapes are not replicated onto the bottom surface of the slot machined. 相似文献
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电火花铣削加工工艺与算法研究 总被引:1,自引:1,他引:0
介绍了电火花铣削加工工艺及其有关计算方法。在大量实验的基础上,研究了微细电火花分层铣削加工,采用电极底面放电方式、电极轨迹规划、电极的损耗及补偿策略和合理选择分层厚度及电极微进给量等关键技术,提高了加工精度和效率。 相似文献
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应用田口-灰关联法对Inconel 718微放电铣削多重质量特性如电极消耗率、材料去除率和扩口量进行最佳化,分析放电电流、脉冲时间、休止时间和极间间隙对加工Inconel 718之电极消耗率、材料去除率和扩口量的影响。实验结果表明,以最佳微放电铣削参数进行加工,其电极消耗率由5.6×10-9mm3/min降低到5.2×10-9mm3/min,材料去除率由0.47×10-8mm3/min增加到1.68×10-8mm3/min,扩口量由1.27μm降低到1.19μm。研究结果显示,应用田口-灰关联法,可以改善微放电铣削多重质量特性。 相似文献