604 スパークフォーミングによるマグネシウム合金箔の微小曲げ加工(OS 塑性加工(1))

概要

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Spark forming is proposed as a new bending method of metal foils for micro-parts adjustment. In spark forming, a foil is bent by rapid heating with electrical discharge spark occurring on the surface of a foil. Spark was caused by using a capacitor with a capacitance of 50-150μF and charged at the voltage of 2O50V. The graphite electrode with a diameter of 0.5mm was connected to the negative pole of the capacitor, and the specimen was connected to the positive one. Magnesium alloy (AZ31) foils with a thickness of 0.3mm were employed as specimens. The bending angle becomes greater as charging voltage, capacitance of the capacitor and sparking number increase. When the sparking pitch increases, the bending angle per sparking point number becomes greater, however, the total bending angle decreases. The bending angle is in inverse proportion to the thickness squared of the specimen.
一般社団法人日本機械学会の論文
2004-11-05