角-オーバル, 角-ダイヤ, 丸-オーバル圧延方式における圧延材の幅広がりと伸びの計算法
1977 年 63 巻 12 号 p. 1819-1827
詳細
1977 年 63 巻 12 号 p. 1819-1827
An experimental investigation of spread and elongation in the pass sequences was made by means of simulative rolling tests using plasticine as a model material and laboratory hot rolling tests of commertial steel for a wide range of geometrical conditions. Through analytical and statistical treatment of the data, it was found that in any pass sequence the spread index k defined in this paper could be expressed as a function of a newly introduced geometrical criterion US.
A calculation scheme was developed for predicting coefficient of spread β and coefficient of elongation λ in these pass-rollings by taking advantage of the k-US relations.
The accuracy of the proposed method was checked on the all experimental points of plasticine model, and it was proved that calculated values of β and λ agreed with experimential values with in ±4% in error.
