Two-roller rolling mill has long been used for various sheet and strip processing, ranging from thin foil to thick plates. In two-roller rolling, or two-high mill, the material passes between two rollers rotating in opposite directions. The bottom roller typically rolls in the opposite direction of the top roller, and strips of material can have thicknesses reduced by as much as 20%.
The two-roller rolling mill is most commonly used for producing sheet metals and thin plates of different widths, as well as reducing material’s thickness in a single pass. It can also be used for work hardening processes, and for accurate roll bending, reducing the stress of material in hot-rolling, and other specific applications. Its working principle is simple, but efficient. Its construction is relatively simple and maintenance is limited, so the two-roller rolling mill is considered to be a cost effective machine.
The two main types of two-roller rolling mill are the two-high mill and the four-high mill. The two-high mill works similar to a standard rolling mill, but as the material passes between the two rollers, the top roller is about 50% longer than the bottom one, allowing for a finer reduction of material thickness. The four-high mill, on the other hand, can provides for a higher reduction of material, as the two top rollers and two bottom ones, are both shorter than the two-high mill’s, and pass the material four times in one operation.
There are several advantages to using two-roller rolling mills. One is that they require less installation space and can operate quickly, resulting in savings in time and money. Another is that they require much less power than other types of rolling mills. They also have good temperature and speed consistency, making them more efficient than other types of mills.
In conclusion, a two-roller rolling mill is an efficient and cost-effective way to roll metal sheets and thin plates, as well as reducing material’s thickness in a single pass. Two-roller rolling mills have many advantages, including requiring less installation space and power, and being less expensive than other types of rolling mills. For most operations, whether it be hot or cold rolling, or applied on an industrial or a small scale level, a two-roller rolling mill is an excellent choice.
