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Performance requirements for rolling rolls

Performance requirements for rolling rolls

As is well known, corrugated rollers are the core components of corrugated cardboard production lines, and the correct use and maintenance of corrugated rollers are particularly important. 1. Try to use high-quality corrugated base paper as much as possible. Practice has shown that in digital printing in China, low-cost and low-quality corrugated base paper can exacerbate the wear and tear of corrugated rollers, reducing their service life. 2. Install a limit device to accurately adjust the pressure and gap between the corrugated roller and the pressure roller. In the single-sided machine of the corrugated cardboard production line, when the corrugated peak of the adhesive coated corrugated cardboard is bonded to the surface paper, there needs to be a certain pressure between the corrugated roller and the pressure roller to ensure the bonding effect.

Roll classification

Roll classification

There are various classification methods for rollers, mainly including: (1) strip steel rollers, profile steel rollers, wire rod rollers, etc. according to product types; (2) According to the position of the rolling rolls in the rolling mill series, they are divided into blooming rolls, rough rolling rolls, finishing rolls, etc; (3) According to the roll function, there are scale breaking rolls, piercing rolls, leveling rolls, etc; (4) According to the material of the rollers, they are divided into steel rollers, cast iron rollers, hard alloy rollers, ceramic rollers, etc; (5) According to manufacturing methods, there are casting rolls, forging rolls, surfacing rolls, sleeve rolling rolls, etc; (6) According to the state of the rolled steel, there are hot rolling rolls and cold rolling rolls.

What are the performance requirements for rolling rolls

What are the performance requirements for rolling rolls

The main requirements for rough rolling rolls are usually strength and resistance to thermal cracking; The working roll weight of a small 20 high rolling mill is only about 100 grams, while the support roll weight of a wide and thick plate rolling mill has exceeded 200 tons. When selecting rollers, the main material for safe load-bearing capacity (various grades of cast iron, cast steel, or forged steel, etc.) should be selected based on the basic strength requirements of the rolling mill for the rollers.

Correct selection of rollers to meet production requirements

Correct selection of rollers to meet production requirements

Residual stress and thermal stress may occur during the preparation process before production and use of the roller. During application, it is further subjected to various cyclic stresses, including twists and turns, changes, shear forces, contact stresses, and thermal stresses. The distribution of these stresses along the roll body is uneven and constantly changing, not only due to planning factors, but also to the continuous changes in wear, temperature, and roll shape during the use of the roll.

Why do metallurgical cast steel rollers undergo high-temperature diffusion treatment?

Why do metallurgical cast steel rollers undergo high-temperature diffusion treatment?

During the solidification of cast steel rollers, the presence of dendritic crystals can cause intergranular segregation of alloy components. This segregation is caused by the inability to achieve sequential solidification of the upper and lower layers, inner and outer layers of the roller body during the solidification process.

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