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Abstract: Conventional electrical discharge machining(EDM) is
generally carried out in dielectric liquid such as kerosene-based oil.
Although liquid medium is regarded as indispensable for the stability
and efficiency of the process，but it may cause certain environmental
pollution. Based on analyzing the machining mechanism of EDM in
compressed gas，a new wire-cut EDM(WEDM) in gas is presented. For WEDM in
gas，its traveling tool electrode may conduce to removing debris from the
working gap even in atmosphere and by utilizing this process as
finish-cut，obtained straightness along the work's thickness direction is
significantly better than that machined in water. Experimental results
of low speed WEDM have proved above-mentioned features and those of high
speed WEDM preliminarily show that WEDM in gas has broad prospects to
its application.
Key words: WEDM in gas Multiple-cut (finish-cut) Straightness
CLC No: TG661
国家自然科学基金(50105003)、黑龙江省博士后研究人员科研启动基金和黑龙江省教育厅科学技术研究(10511113)资助项目.
Received 20020822, received in revised form 20030120
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