A split rolling process

Abstract

The invention discloses a slitting and rolling process, which includes K6 flat roll rolling, K5 box-shaped fixed-width pass, K4 pre-slitting pass and K3 slitting pass, and is characterized in that the K3 slitting pass The roll used in the second place includes an upper rolling groove and a lower rolling groove. The upper rolling groove and the lower rolling groove are assembled up and down to form a complete cutting pass. The upper rolling groove and the lower rolling groove are provided with a number of grooves at the corresponding positions. A wedge top is formed between the upper rolling groove and the lower rolling groove to form a number of circular pass patterns arranged in parallel. The pass patterns are not closed in the horizontal direction and are connected to each other. It is a centerline hole, and the area of ​​the sideline hole is greater than or equal to the area of ​​the centerline hole. The slit rolling process of the present invention comprehensively considers the influence of rolling mill bounce, and the line difference can be effectively controlled when the area of ​​the side line hole is greater than or equal to the area of ​​the center line hole; the line difference can be controlled at 200mm by adjusting the area of ​​the side line hole of the slit pass. Within , the negative bias difference can be controlled within 1.0%.

Description

technical field [0001] The invention relates to the technical field of multi-line split rolling, in particular to a split rolling process. Background technique [0002] Slit rolling means that during the rolling process, the steel billet is rolled into two or more parallel parts with the same cross-sectional shape through pass design, and then the billet is longitudinally cut into two or more cross-sections by the cutting equipment. The same shape of the rolled piece, and continue rolling until the finished product is obtained. There are burrs on the part of the slitting strip, and the incision is irregular. It is easy to form folds after rolling, which affects the surface quality of the rolled material. When the shearing method is used to separate the rolled pieces in parallel, the rolled pieces are easy to twist, which affects the quality of the rolled piece. During the slitting rolling process, due to the influence of pass system parameters, rolling groove wear, rolling ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved and the technical task proposed by the present invention are to improve the existing technology, provide a split rolling process, and solve the problem that the size structure of the traditional split pass in the current technology will cause the line difference and The negative bias rate fluctuates greatly, and the centerline folding defect is serious.

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