Studies on Copper Alloy Electrodes for Electric-spark Machining

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  • 放電加工電極用銅合金の研究
  • ホウデン カコウ デンキョクヨウ ドウ ゴウキン ノ ケンキュウ

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Abstract

This is the second of a series of papers concerned with the electrode erosion phenomena accompanying the electric-spark machining. This paper deals with the electrode erosion of copper alloys. Copper alloys which contain oxygen show good results both in erosion ratio and in erosion velocity of steel work piece. These electrodes can be favorably applied to the machining of WC hard alloy also. Oxygen in copper gives negative ion and modulate the spark atomosphere giving good results in electrode characteristics. The composition and electrode characteristics of the best electrode are as follows: Cu-O2 alloy (Cu2O 3.4%) erosion ratio for steel work: 0.10 erosion velocity of steel work (tap 1):1100 (mg/min)

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