スチーフエル・マンネスマン式穿孔機による製管法の研究 I : 傾斜角の影響

概要

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By the actual use of the Stiefel-Mannesmann Piercer, the authors studied the effects of inclined angle upon the state of piercing phenomena from various points of view. The variations of angle were from 5° to 9°, with the other factors kept constant. The results obtained by us were enumerated as follows : In case the inclined angle was increased, (1) The K. W. increased linearly, but the K. W. H. decreased, resulting in the increase of rolling efficiency. (2) The deformation in the course of piercing process remained unchanged, but the angle of torsion during the piercing process increased. (3) The axial moving speed of tubes increased linearly. (4) The revolving speed of tubes decreased. (5) The reduction in the piercing process increased, but the reduction speed remained almost constant. (6) The cracks that appeared on the inner and outer surfaces of tubes increased when the round billets were not good in quality, but no difference would presumably appear when the billets were in excellent quality.
社団法人日本鉄鋼協会の論文
1952-06-25