密閉形水中放電成形法によるアルミニウム箔の深絞り成形に関する実験的研究(<特集>塑性工学)

概要

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This study investigates the deep drawing of aluminum foil by using the closed type hydro spark forming method. The effects of several forming conditions on thickness distribution and limiting drawing height (LDH) of product are extensively investigated. Forming conditions are chosen to be the distance between electrodes, condenser capacity, exploding wire position, closed volume and inclination of blank holder surface. The charging energy significantly affects formability, i.e., the conditions with not only larger but also smaller charging energies result in breakage of blanks. The appropriate charging energy condition yields the largest amount of blank drawn into die. The explosion rate, represented by the full width at half maximum (FWHM) of electric power wave, is found to have an optimum value for obtaining the largest LDH. The optimum FWHM is applied to a forming condition with small LDH, and the LDH can be successfully improved by controlling FWHM.
社団法人日本材料学会の論文
1995-05-15