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  • 1
    Electronic Resource
    Electronic Resource
    Experiment Study of Combining Micro EDM with USM (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 375-376 (Mar. 2008), p. 248-252 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Experiments of combining micro EDM with USM are carried out to enhance themachining ability and flexibility of the micro EDM, improve the machining state, and increase theproductivity and aspect ratio of the micro holes. Basing on RC pulse power supply and workpiecevibration, the micro holes are drilled. The results of comparing experiments indicate that in theprocesses of both micro EDM without USM and micro EDM with USM, the machining velocityand the wear of the electrode increase with the increase of open voltage and loop capacitance. Theexperiment results of amplitude influencing on the machining process indicate that with the increaseof ultrasonic amplitude, the machining velocity heightens and the aspect ratio of the micro holesaugments; at the same time, however, the wear of the electrode and the extensive magnitude of theholes increase. Micro holes with some cross-section and accurate profile are drilled steadily
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.375-376.248.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Fabrication of Cylindrical Tungsten Microelectrode by Electrical Machining (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 375-376 (Mar. 2008), p. 298-302 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Developed with micro technology, the microelectrode is the key manufacture technique.The micro electrical machining, mainly including micro electrical discharge machining (EDM) andelectrochemical machining (ECM), is one of the important technologies of microelectrodefabrication. Firstly, the microelectrode was fabricated with a counter block of EDM while thecylindrical tungsten electrode fed along radius and its axis. Then the fabrication technology of ECMwas also introduced. The pulses power supply and the non-passivation electrolyte were used. Thecylindrical tungsten electrode also can be served as the probe of the scanning probe microscopy,which fabricated by ECM. Through comparisons, the surface roughness, machining efficiency, andmachining capability of the microelectrode fabricated by ECM are better than those of themicroelectrode fabricated by EDM, but the shape and the microhardness are worse than those of themicroelectrode fabricated by EDM. Both of them can fabricate the cylindrical tungstenmicroelectrodes with several micrometers diameter
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.375-376.298.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Study to Enhance the Precision of Micro-EDM (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 339 (May 2007), p. 26-31 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Considering the key technologies to enhance the accuracy of micro-EDM, a micro-EDMsystem and some techniques are researched. In this system, a micro-energy pulse power supplywhose open voltage and capacitance can be adjusted is developed. The detection and controlsubsystem of the machining process is designed and applied. A simple method of machining highprecision microelectrodes is adopted. The forming mechanism of the gap in EDM process isanalyzed theoretically. The processing experiments are carried out on the system, and the resultsbasically coincide with the theoretical analysis. The experimental results of machiningmicroelectrodes and micro holes show that the Ø4.5±0.5μm microelectrodes can be ground, and theØ6±2.0μm micro holes can be drilled
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.339.26.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Experimental Study of Micro Holes Machining by USM (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 532-533 (Dec. 2006), p. 21-24 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: It is necessary to drill micro holes in some hard brittle materials. Comparing with electrodischarge machining, electrochemical machining and laser machining, the ultrasonic machining(USM) has unique advantages in hard brittle materials machining. The aim of this paper is topresent experimental work that has been done in micro holes machining by micro USM. The mainmachining mechanisms of USM are discussed. It is pointed out that the contributions of eachmechanism to material removal rate are different in different cases. By using micro USM withworkpiece vibration and tool feeding in constant rate, the experiments of micro holes machining arecarried out and the process laws of tool wear are studied. Some phenomena are found and thecausation of causing these phenomena is analyzed. A Ø13μm micro hole is obtained
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.21.pdf
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