共查询到19条相似文献,搜索用时 171 毫秒
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本文以工艺试验为基础,结合电火花放电机理、固体材料的传热理论,研究了微能脉冲放电波形与加工表面形貌的关系及脉冲能量在工件与电极上的分配。 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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陶希海 《组合机床与自动化加工技术》2009,(4)
粉末冶金模具的加工制造方法直接影响着粉末冶金制品的质量、开发周期及制造成本.线切割加工具有不需要特定形状的电极,加工几乎所有硬度、任何形状的工件,轮廓加工所需的加工余量小,利于少无切削,电极丝往复使用,损耗较小,加工精度高等特点,这种加工工艺非常适合于小批量多品种粉末冶金模具的加工.本文根据数控线切割加工粉末冶金模具的加工工艺方法,利用Pro/Engineer系统的Pro/NC模块,研究了粉末冶金模具型腔的数控线切割加工仿真,并自动生成了数控加工程序,从而将产品的计算机辅助设计(CAD)与计算机辅助制造(CAM)实现了无缝结合,大大提高了粉末冶金制品的制造精度,实现了加工自动化,缩短了开发周期,降低了制造成本. 相似文献
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阐述了电加工电极专用石墨的物理特性及其对放电加工工艺效果的影响,详细介绍了电加工电极专用石墨的选用原则,有助于根据加工需要科学地选用电加工电极专用石墨材料,提高电火花成形加工效果。 相似文献
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介绍了在普通线切割机床上加工转轮电极的操作步骤,提高了转轮电极的制造效率和制造精度,拓宽了普通线切割机床的加工工艺范围,为普通线切割机床实施螺旋加工提供了一种行之有效的方法。 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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Apiwat Muttamara Yasushi Fukuzawa Naotake Mohri Takayuki Tani 《Journal of Materials Processing Technology》2003,140(1-3):243-247
Electrical discharge machining (EDM) is used as a precision machining method for the electrically conductive hard materials with a soft electrode material. But recently we succeeded to machine on insulating material by EDM. The technology is named as an assisting electrode method. The EDMed surface is covered with the electrical conductive layer during discharge. The layer holds the electrical conductivity during discharge. For micro-EDM, the wear of tool electrode becomes lager ratio than the normal machining. So the micro-machining is extremely difficult to get the precision sample.
In this paper to obtain a fine and precise ceramics sample, some trials were carried out considering the EDM conditions, tool electrodes material and assisting electrode materials. Insulating Si3N4 ceramics were used for workpiece. The machining properties were estimated by the removal rate and tool wear ratio. To confirm the change of micro-machining process, the discharge waveforms were observed. The micro-machining of the Ø0.05 mm hole could be machined with the commercial sinking electrical discharge machine. 相似文献
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Ki Young Song Do Kwan Chung Min Soo Park Chong Nam Chu 《Journal of Materials Processing Technology》2013,213(9):1495-1500
Turning by electrical discharge machining (EDM turning) is an effective method to machine hard-to-cut materials. Generally, a wire-EDM is utilized in EDM turning because it is not concerned with electrode wear. However, wire-EDM turning has a slow machining speed due to its small machining area, and the wire may break due to overheating electrodes. For these reasons, its machining speed must be limited. In this study, a strip-EDM was created in an effort to overcome the problems in the EDM-turning process. This machining method used a conductive strip as an electrode. The strip was fed continuously, like a wire-EDM; therefore electrode wear was not a concern. One advantage of the strip-EDM was that it increased the material removal rate because of its large machining area and non-breaking electrode. In the experiments, machining characteristics were investigated according to machining conditions, and practical machining was carried out via fabrication of complex shapes on a shaft workpiece. 相似文献
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A study of EDM and ECM/ECM-lapping complex machining technology 总被引:1,自引:0,他引:1
Tsuneo Kurita Mitsuro Hattori 《International Journal of Machine Tools and Manufacture》2006,46(14):1804-1810
EDM (electrodischarge machining) and ECM (electrochemical machining)/ECM-lapping complex machining is investigated in this paper. First, EDM shaping and ECM finishing technology are investigated. These processes are carried out in sequence on the same machine tool with the same electrode (copper) and the same machining liquid (water). Two types of EDM and ECM complex machining are investigated. One is with a formed electrode, and the other is with simple-shape electrode scanning. The complex machining with electrode scanning is applied to produce small and various-shaped components without making a formed electrode. The EDM surface of 1 μm Ra is improved to 0.2 μm Ra by applying ECM. Second, in order to get a smoother surface, a new EDM and ECM-lapping complex machining technology is developed. The surface roughness of a machined hole is improved to 0.07 μm Ra by applying 2 min of ECM lapping. The surface finishing of a hole shape is demonstrated with the complex machining technology. 相似文献
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M.P. Samuel P.K. Philip 《International Journal of Machine Tools and Manufacture》1997,37(11):1625-1633
Electrodes in electrical discharge machining (EDM) can be compared with cutting tools in conventional machining. Tool performance is one of the important factors that determine the quality of the machined component. Due to the ease of manufacturing and control over the properties of electrodes, the powder metallurgy (P/M) technique has an advantage over other methods of electrode fabrication. P/M electrodes affect the micro- and macrovariables in EDM and the properties of P/M electrodes can be controlled over a wide range by adjusting the compacting and sintering conditions. The performance of P/M electrodes on various aspects of EDM operation is discussed in this paper. 相似文献
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基于旋转电极的方孔电火花加工新方法 总被引:1,自引:0,他引:1
提出一种方孔电火花加工新方法,利用具有勒洛三角形截面形状的工具电极在等宽方形约束孔中转动,使电极沿横截面扫过一个正方形区域,从而通过电极底面放电加工出方孔。分析了勒洛三角形电极在与其等宽的方孔中的运动方式和轨迹,设计了基于旋转电极的方孔电火花加工装置,通过实验验证了该方法的可行性。在不同的开路电压下,分别利用旋转的勒洛三角形电极和不旋转的方形电极进行方孔加工,发现旋转的勒洛三角形电极加工效率更高、电极损耗更低。 相似文献
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以孔形型腔和手机模具型腔为例,探讨两种情形下电极的设计以及根据电极的实际加工尺寸和机床的加工参数表选择电火花加工参数的过程,以便在实践中更好地掌握电火花加工技术。 相似文献