On the selection of roll mill for roll manufacturers

It is necessary to fully understand the types and configurations of various rolling mills before selecting appropriate rolls to achieve added yield and improve product quality. Today, let the roll manufacturer Wuxi Taihu roll editor bring you the explanation of roll mill selection.

1. Bar and small section mill

Generally speaking, the roll manufacturer indicates that the bar and small profile rolling mill can use both ingots with a scale range of 80 ~ 150mm and continuous casting billets with the same scale range to produce small products and bars. The initial feed temperature of bar and small profile rolling mill is 1200 ℃, and the rolling mill can produce both semi continuous and full continuous. Continuous rolling mill is the current development trend, including roughing, medium and finish rolling stands. Roughing mill stands are placed in horizontal / vertical order, which mainly depends on the product composition. Intermediate stands and finishing stands can be either vertical or horizontal. For bars, the rolling mill is composed of more vertical frames, while for other small profiles, the horizontal frame is often selected.

In the small profile rolling mill, the selected roll diameter is 300 ~ 600mm and the roll body length is 700mm according to the different feeding materials and final product dimensions. As for the public service of products, users generally require one-third of the international public service standard, and a product should have a good appearance finish. For small profile, the rolling speed of the rolling mill has increased from 12m / s to 20m / s, while for bar mill, the rolling speed has increased to 36m / s.

2. Wire mill

The wire mill has a roughing stand and an intermediate stand similar to the small profile mill. Compared with two-line small profile rolling mills, these rolling mills are generally planned to be able to carry out slitting rolling of up to 4 lines. However, the current development trend is to choose single line high-speed rolling. Modern wire rod mills generally have 8 ~ 10 non torsion stands, which are placed at an angle of 90 ° to each other in the finishing mill.

Now, the roll diameter used in wire rod mill is limited to 200mm. The rolling speed can be as high as 140m / s.

3. Medium profile rolling mill and large profile rolling mill

After the roughing stand, the medium-sized profile rolling mill has two groups of successive stands. The continuous rolling mill can be placed horizontally or vertically according to the pass planning. For sections and channels with parallel edges, an all-round frame is also equipped. When rolling other profiles, the universal frame can be replaced with a horizontal frame. The roll of the horizontal frame has a deep pass, while the universal frame does not.

A horizontal roll with a larger diameter confirms the shape of the section steel, while a hostile roll with a smaller diameter is used to roll the edge. When the blank passes through the finishing roll of traditional stand and universal stand, it can obtain good surface finish and scale.

OK, the above is a brief introduction of the roll manufacturer on the selection of roll mills. If you want to know more about roll products and roll manufacturers, please pay attention to the roll manufacturer Wuxi Taihu roll Xiaobian.