パイプ電極を用いた加工液吸引放電創成加工法に関する研究

概要

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A Numerical Contouring Control Electric Discharge Machining system (NCC-EDM) has been developed to generate three-dimensional surfaces efficiently by use of pipe electrodes. Now there are various methods to stabilize the EDM, but in general a periodical jump of an electrode has been used to remove chips and gases generated by the EDM. However the jump reduces the machining speed. This paper proposes a new NCC-EDM in which copper pipes having 6 mm O.D. and 3 mm I. D. are used for making pipe electrodes. The pipe electrodes can be easily made by bending the copper pipes into required shapes, and then many 1 mm diameter holes are drilled in each electrode in the another direction of its movement. Dielectric is sucked with chips and gases through the holes by a pump which is installed separately from the NC ED machine. From the results of the experiments, it is confirmed that this method makes it possible to maintain the stability and high efficiency of the stock-removal-EDM without any electrode jump.
社団法人精密工学会の論文
1989-09-05