Many different kinds of roller, and undertake practical application, is there will be a unique role, according to process flow is the pressure will be divided into rolling stick, bachelor and its stretch roller, etc., according to its functional purpose, that is, will be divided into heating roller, cooling roller, away from the roll or roller, etc., according to the structure, that is, will be divided into seamless steel pipe roller or forging and the centrifugal casting roll and so on.

Regardless of the use of any kind of technology, the structure, design, material selection and manufacturing of the roller is to pay attention to be in line with several basic requirements. First of all, the roller itself should be sufficiently rigid to ensure that its bending deformation does not exceed the allowable value under heavy load.

When the surface of roller is processed, it should be paid attention to that it must have enough hardness. Generally speaking, it is required to reach HRC above 50 degrees, and then it has strong corrosion resistance. The coating itself will have a strong ability to resist spalling, at this time, that is, to ensure that the roller working surface has better wear resistance and corrosion resistance.

Roller working surface should be to pay attention to the implementation of fine machining, this is to ensure dimensional accuracy and surface roughness. The roughness should be above Ra0.16. There should be no pores or grooves. The wall thickness of the working surface of the roller should also be kept even, otherwise, the temperature of the roller surface will be uneven, which will affect the quality of the product itself.

The material of roller should have good thermal conductivity. Generally speaking, chilled cast iron will be used. In special cases, cast steel or molybdenum chromium alloy steel will be used. And this roller in the design, must be convenient for us to process, the cost is relatively low.