PURPOSE: To add an installation of a small scale to a rolling installation and to produce an angle steel having high quality by forming a double peaked trapezoidal shape in the longitudinal direction of a billet which is rolled to a flat rectangular shape in a rolling state, cutting the continuous part then forming the same to the angle steel in a two strand region.
CONSTITUTION: Stand groups 2, 3, 4, a cooling bed 5, a line-out table 6, etc. are disposed in the conveyance route for the billet come out of a heating furnace 1. The calibers of the rolls in the respective stands are of a flat rectangular shape from the 1stW the 6th stands, are of an inverted trapezoidal shape in the 7th stand and is formed with a hollow groove 7 like a cutting groove in the longitudinal central part of the billet in the 8thW the 10th stands. A slitter 11 is provided on the outlet side of the 11th stand. A caliber 10 of a double peaked trapezoidal shape wherein peaked trapezoidal shapes are formed adjacently of a small projecting line in the central part of the caliber of the lower roll 9 in the stand just before the slitter 11 and a projecting line 13 opposite to the line 12 in te central part of the caliber of an upper roll 8 is formed. The billet is rolled to an angle steel in the two strand region after said stands.
MATSUMOTO MASAKAZU
FUJIMOTO SHIYUNICHI
| JPS52116762A | 1977-09-30 | |||
| JPS5433252A | 1979-03-10 |
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