Among small steel production enterprises, the most important thing when purchasing rolling mills is the control of funds. The only restriction on purchasing funds has forced many small steel companies to choose to eliminate or second-hand rolled steel from the market. Equipment, in fact, from the point of view of our rolling mill manufacturers, this choice is actually a lack of rational analysis and a large survey of the rolling mill market.
In the new rolling mill equipment, the ex-factory price is actually not high. Of course, it is for second-hand machinery. After passing through the trading company, the price is naturally relatively high, but in fact the price range of new and second-hand machines Not many. Compared with new equipment, because the rolling mill is a continuous working machine, it is consumed all the time, and its performance must be reduced, including the control of the service life of the motor and the wear condition of the main machine roll. There are factors that need to be taken into consideration. Therefore, it is not a good deal to buy old and second-hand machinery.
Although the model of the small rolling mill is small, it is superior in the diversification of functions. It can also roll small wire rods at the same time as the billet. This rolling mill product can replace the roll of the finishing mill without the billeting process. , Reduce the labor and capital of the production enterprise, in addition, by using the precise rolling mill base, applying the prestressed rolling mill frame and adjusting the rolls of the upper, middle and lower three series, it can ensure that the produced wire rod has a good quality assurance. This kind of rolling mill is most suitable for small steel wire rod production enterprises.
When this kind of small steel rolling mill was first launched, it was not favored by the market, including our production company itself, could not guarantee that it could occupy the market share with this steel rolling machine. However, after market research, the market demand for small wire rods has a strong follow-up force. , Because large wire rod manufacturers generally do the rolling of engineering wire rods, the required rolling mills are large in number, efficient in output, and large-scale developers or social infrastructure. Such customers. This small rolling mill has a small investment and is very suitable for small investment companies to manufacture
There are many types of rolling mills. The main ones we know in detail are billet rolling mills, billet rolling mills, section steel rolling mills, hot-rolled strip rolling mills, cold strip rolling mills, steel tube rolling mills, special-purpose rolling mills, etc. These rolling mills are basically classified according to the cross-section of the products rolled by the rolling mills. Therefore, the size of the rolling mill depends on the cross-sectional size of the products it rolls.
Although all rolling mills are used for rolling steel, there are actually many types of rolling mills. Below, ShenGong Machinery will explain several common performance characteristics of different rolling mills in the market:
HC rolling mill: a high-performance rolling mill with controllable roll profile. It is equivalent to adding a pair of axially movable intermediate rolls between the work roll and the supporting roll of a four-high mill, and adjust the corresponding ends of the two intermediate rolls to the positions corresponding to the two edges of the strip to improve The pressure distribution and the uniformity of the elastic flattening of the work rolls ensure the dimensional accuracy of the strip steel and reduce defects such as ultra-thinness and cracking of its edges. The cold drawing machine of HC rolling mill is suitable for cold rolling wide strip steel.
Eight-hig rolling mill: It is a variant of the four-high rolling mill. The diameter of the work roll is 1/6 of that of the backup roll, and the relative offset is made to prevent the horizontal bending of the work roll. The rolling force is half smaller than that of a four-high rolling mill. The work roll has good stability and high horizontal rigidity, and can be used to roll some products that must be rolled by a 20-high rolling mill. Its structure and adjustment are much simpler than the 20-high rolling mill. This kind of rolling mill can be converted into several types of two, four, eight, and sixteen rolls, which is suitable for the needs of multiple varieties, so it is also called a multi-purpose rolling mill. It is available in reversible and continuous rolling, and is used for cold rolling of hard-to-deform steel, silicon steel and non-ferrous metal strips.
Six-high rolling mill: It consists of a pair of work rolls and two pairs of support rolls, with a relatively stable roll system. However, its rigidity is similar to that of a four-high rolling mill, and its operation is inconvenient, so it is not widely used. Six-high rolling mills and special-shaped straightening mills are generally used for rolling high-precision copper strips for submarine cables.
Multi-roll mill: There are three types of twelve rolls, twenty rolls and thirty-six rolls. The pair of rolls with the smallest diameter in the middle of the rolling mill are work rolls, and the rest are backup rolls. It has the advantages of high relative rigidity, large reduction, small rolling force, and extremely thin strips. The early multi-roll mills were driven by work rolls, and later by intermediate backup rolls. It can roll foils with a width of 200-1000 mm and a thickness of 0.02-0.0015 mm.
Post time: Mar-30-2021