閉そく型を導入した転造法による歯車の塑性加工 : 端面摩擦を伴わない遠心流による型内への材料充満

概要

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A new method of producing precision cylindrical gears in quantities is developed. In this method, the middle part of a blank cylinder bulges by the cold rolling onto the adjoining part of the cylinder, and the material flows radially into a closed die to form a gear. This forming technique has several advantages over the conventional die forging. Firstly, the material moves radially without frictional constraint on the transverse planes of a gear to fill a closed die. Secondly, the localized deformation of the material reduces a forming load. Moreover, the accuracy of the products formed by this method is better than that by conventional gear-rolling. The experimental demonstration of this method is carried out on aluminum specimens with different modules, and conditions suitable for practical application are investigated.
一般社団法人日本機械学会の論文
1989-01-25