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Date of Publication:2022-10-09

Journal:大连理工大学学报

Affiliation of Author(s):机械工程学院

Issue:6

Page Number:838-845

ISSN No.:1000-8608

Abstract:Due to its contact-less process ,micro-electrical discharge machining (EDM ) enables very small machining forces between the electrode and workpiece , and it has been one of the most important technologies in micro-manufacturing field of difficult-to-cut alloy materials .Discharge peak current ( I ) , pulse duration ( Ton ) , pulse interval ( Tof ) and capacitance ( C ) are selected as experimental parameters , and an orthogonal experiment of micro-channels on difficult-to-cut alloy materials is carried out . Moreover , the machining characteristics of the electrical parameters on machining time and electrode wear are analyzed according to the results of experiments .Finally ,a multi-objective optimization method is employed to achieve the highest processing efficiency and the lowest electrode wear ,and micro-channels on the three kinds of difficult-to-cut materials ,stainless steel ,invar steel ,titanium alloy ,are machined with the optimal parameters .The experimental results show that the electrical parameters have a great impact on processing efficiency and quality ,and the processing efficiency can be improved greatly without losing machining quality by the proposed multi-objective optimization method .

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