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The role of backup rollings

Backup rolls are generally used in tension levelers, levelers, rolling mills and other equipment. Since the work roll is relatively slender, it cannot bear the radial load generated when straightening the shape of the sheet and rolling the sheet. At this time, it is necessary to arrange a backup roll under the work roll or the intermediate roll to bear the radial load, which acts as a pair of work rolls. , The role of the middle roller is similar to lifting. If the circumference of the backup roll is large and the concentricity is not good, it will directly affect the work roll, resulting in vibration lines and scratches on the plate shape after tension and straightening. Generally, the circular runout of the backup roller should be controlled within 0.01mm. If the runout is too large, it is a non-standard product and should not be used.

mill rolls

Due to the use environment of the backup roll, it must bear a large radial force, so it is the most critical mechanical part of the equipment except the work roll. Many equipment manufacturers do not understand the structure of the backup roller, and use ball bearings and bushing parts to assemble the backup roller by themselves. This kind of backup roller is extremely insufferable, and the poor accuracy affects the use.

The real backup roll should be composed of mandrel, bearing sleeve, needle roller, seals, fasteners, heat-resistant extreme pressure grease, and the heat treatment hardness, material selection, clearance fit, assembly and debugging of each part have specifications and requirements . In the tension leveling line below 450 m/min, the service life of the backup roller should be between half a year and two years (depending on the initial plate type and use environment). If the backup roller is broken in two or three months, please Inform the supplier in time, it is basically a quality problem or improper use.

LMM GROUP backup rollings

Higher hardness uniformity of barrel surface and maintain the hardness to the discarded diameter;
Very good wear resistance for the whole working layer;
Excellent anti-spalling property;
Excellent resistance to fracture due to high
strength of core material;
Uniform wear curve and good strip profile;
Longer rolling campaign;

 Back up Rolls
Material Barrel Length (mm) Diameter (mm) Total Length(mm) Maximum Weight
Cr3 ≤2800 ≤1800 ≤7000 80t
Cr5 ≤2800 ≤1800 ≤7000 80t

rolling mill rolls manufacturer

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As professional one-stop solution provider, LIAONING MINERAL & METALLURGY GROUP CO., LTD(LMM GROUP) Established in 2007, and focus on engineering research & design, production & delivery, technology transfer, installation & commissioning, construction & building, operation & management for iron, steel & metallurgical industries globally. 

Our product  have been supplied to world’s top steel manufacturer Arcelormittal, TATA Steel, EZZ steel etc. We do OEM for Concast and Danieli for a long time.

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As professional one-stop solution provider, LIAONING MINERAL & METALLURGY GROUP CO., LTD(LMM GROUP) Established in 2007, and focus on engineering research & design, production & delivery, technology transfer, installation & commissioning, construction & building, operation & management for iron, steel & metallurgical industries globally. 

Our product  have been supplied to world’s top steel manufacturer Arcelormittal, TATA Steel, EZZ steel etc. We do OEM for Concast and Danieli for a long time.

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