共查询到19条相似文献,搜索用时 218 毫秒
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概述了国内外非导电陶瓷磨削加工技术的研究进展.对延性域磨削和半延展性磨削、在线电解修整磨削、电化学在线控制修整磨削等精密、超精密磨削加工技术及超声波辅助磨削、激光预热辅助磨削、机械电解电火花复合磨削、电火花磨削等特种加工复合磨削技术的原理、特点进行了分析评述.提出了非导电陶瓷的电火花诱导可控烧蚀磨削加工技术,并介绍了其... 相似文献
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利用快速成型技术和复合陶瓷型壳技术制备叶轮发泡模具电火花加工电极的精密铸造型壳,实现了电极的快速精密铸造。实践表明,使用该工艺铸造的电极具有尺寸精度高、表面光洁度好的特点,可满足模具电火花加工的使用要求。 相似文献
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数控精密电火花与线切割加工在现代模具加工中的应用 总被引:2,自引:2,他引:0
分析了数控精密电火花线切割加工技术及电火花成型加工技术在冲模及型腔模加工中的应用,探讨了电火花与线切割在模具加工应用中的几种特殊加工方法,如电火花线切割、电火花成型以及电火花微细孔机的特殊加工方法。 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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分析了数控电火花加工特点,介绍了LYNUC数控系统HiPT高速高精度核心控制模块的切削特点。通过实际切削加工案例的分析,证实了在辅助电火花放电加工的切削工序中,HiPT高速高精度模块可以获得高品质的切削电极和放电加工工件,且有效地提高数控电火花加工表面精度和加工效率,降低了生产成本。 相似文献
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《CIRP Annals》1988,37(2):623-631
As a thermal machining process, Electro-Discharge Machining (EDM) provides a means of machining ceramic materials, irrespective of their hardness and strength, provided that their electrical conductivity values are of the order of 0.01 S/cm (100 Ω*cm), as is sometimes the case with engineering ceramics.EDM achieves high removal rates as compared with traditional techniques for the machining of these materials. The lack of correlation between the cutting rate, the surface roughness and the physical material parameters confirms that the removal mechanisms for machining conductive ceramics differ from those involved in metal machining. In order to ensure process stability, the grain structure evinced by the ceramic must be as fine and homogeneous as possible. The complex workpiece geometries and high accuracy to shape and size attainable with electro-discharge machining particularly favour its use in toolmaking. 相似文献
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In order to improve the performance of machines, there is a growing need to develop a highly stable servo control system for electrical discharge machining (EDM). With the perpetual push towards the untended EDM operation, an adaptive control system is and will continue to be a primary option. In this paper, a new EDM adaptive control system which directly and automatically regulates tool-down-time has been developed. Based on the real-time-estimated parameters of the EDM process model, by using minimum-variance control strategy, the process controller, a self-tuning regulator, was designed to control the machining process so that the gap states follow the specified gap state. With a properly selected specified gap states, this adaptive system improves the machining rate by, approximately, 100% and in the meantime achieves a more robust and stable machining than the normal machining without adaptive control. This adaptive control system helps to gain the expected goal of an optimal machining performance. 相似文献