The purpose of steel rolling production line is to obtain the required shape, such as steel plates, strip steel, wire rods and various sections, another aspect, in order to improve the internal quality of steel like common automotive plates, bridge steel, boiler steel, pipeline steel, etc. Steel rolling is a continuous and uninterrupted operation. The steel strip runs fast on the roller table with automated equipment bringing high efficiency. Depending on the different temperatures in the rolling method, the steel rolling can be classified into hot rolling and cold rolling. According to the different relationships between the relative movement of the rolling stock and the roll during rolling, it can be divided into vertical rolling, horizontal rolling, and diagonal rolling. In the hot rolling production line, the billet is heated to become soft and is sent into the rolling mill by the roller table, finally rolled to the size required by the users. Compared with hot rolling, the processing line in a cold rolling mill is more scattered. The steel coils sent by the hot rolling mill must undergo three consecutive technical treatments and the oxide film must be removed with hydrochloric acid. Through the cold rolling mill, the uncoiler opens the steel coil and then the steel strip is carried to a five-stand continuous rolling mill to be rolled into a thin strip coil.
Wire Production Line
The wire production line of TINVO has an annual production capacity of 50K to 300K tons and can produce welding rod steel, Φ5.5-Φ20mm round bar, bearing steel, etc. The whole line adopts full continuous twistless rolling, and the finishing mill adopts high-precision cantilever rolling mill with high rolling speed, high output, high product precision and high mechanical performance. The main equipment includes rough rolling, Pre-finishing rolling mill, finishing mill which is a cantilever type twistless high-speed heavy duty rolling mill, pinch roller, wire laying machine, flying shears, water cooling system, transmission and automation.
The process characteristics of high-speed wire rod rolling mills can be summarized as continuous, high-speed, twistless and controlled cooling. Heavy-duty, high-precision, and excellent performance are the product characteristics of high-speed wire rod mills.
High-speed wire production has the following characteristics:
1) High speed of small diameter roller. High-speed wire rod finishing rolling mills generally use tungsten carbide as the rolling tool, with a diameter of 8 or 6 inches. The speed of the finished product can be up to 9000 r/min.
2) There are many racks and different functions. Each rolling mill only rolls once, so modern wire rolling production line has generally 21-28 rolling mills divided into rough rolling, intermediate rolling, pre-finishing rolling & finishing rolling mill. The rough rolling, intermediate rolling using larger extension and multi-groove rolling and finishing rolling using smaller extension and multi-line rolling to achieve both balances the production capacity of each unit and ensure the dimensional accuracy of the product.
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