Semi-continuous rolling mill (semi-tandem rolling mill) is a profile rolling mill that is a combination of a horizontal rolling mill and a continuous rolling mill. The most typical arrangements of semi-continuous rolling mills for profiles are: the roughing mill is in a continuous arrangement and the finishing mill is in a parallel arrangement (Figure a); the roughing mill is in a parallel arrangement (or other forms of arrangement) and the finishing mill is The unit is arranged in a continuous manner (Figure b). The former arrangement mainly considers that the cross-section shape of the rolling stock in the rough rolling stage is simple and facilitates continuous rolling, while the cross-sectional shape of the rolling stock in the finishing rolling stage is complex and the pass pattern wears out quickly. In order to facilitate the adjustment of the rolling mill, the finishing rolling mill units are arranged in horizontal rows. Mode. The latter arrangement is based on the fact that the rolled pieces in the rough rolling stage are shorter and there is no need to implement continuous rolling. The rolling passes can be flexibly adjusted and the range of product varieties can be expanded. The semi-continuous rolling mill not only takes advantage of the advantages of the continuous rolling mill, but also has the advantages of the horizontal rolling mill (or in-line rolling mill, checkerboard rolling mill). However, the production capacity of the rough rolling mill unit and the finishing rolling mill unit is often not balanced enough, which affects the rolling mill. Give full play to production capacity. Semi-continuous profile rolling mills are mostly used in the production of small profiles and wire rods.
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