Method for prolonging service life of checkered roller

Abstract

The invention provides a method for prolonging the service life of a checkered roller. In the method, the adverse effects of a production process and varieties of products on the service life of the checkered roller are reduced by technical means of improving the final rolling temperature of a checkered plate, balancing rolling pressure and load distribution among machine frames, adjusting the difference of roll gaps and the actual control range of edge height and the like to improve temperature drop on the edge of band steel and relieve the damage of non-uniform abrasion to the checkered roller, so that rolling pressure and loads are balanced and reasonable, and the abrasion speed of the checkered roller is retarded; and the products reach the standard, the requirements of clients are met, the damage degree to the checkered roller is reduced, and the phenomena of spoiling or surface dropping of the checkered roller are avoided, so that the average unit consumption of the checkered roller is reduced to 12.99 yuan / ton. Simultaneously, the costs of the storage, maintenance and replacement of spare parts can be reduced, the production cost can be reduced, the operation rate of a rolling mill and related equipment can be improved, and the production can be performed smoothly.

Description

technical field [0001] The invention belongs to the technical field of steel rolling technology, and in particular relates to a method for improving the service life of patterned rolls by adjusting and optimizing the production process of patterned plates. Background technique [0002] Checkered plate is a variety of hot-rolled strip steel production. Due to the particularity of the rolled strip steel surface, special rolls, so-called patterned rolls, must be used for rolling production. However, in the long-term checkered plate production process, it is found that the roll consumption of the checkered roll is significantly higher than that of ordinary rolls used to produce other strips. The reason is mainly due to the characteristics of the production process of the checkered plate and the characteristics of the roll surface of the checkered roll itself. First, due to the lower target temperature of finish rolling and finishing rolling of checkered plate, generally the tar...

AI Technical Summary

Problems solved by technology

First, due to the lower target temperature of finish rolling and finishing rolling of checkered plate, generally the target temperature of finishing rolling is between 860 and 880°C, and the thicker the finished strip steel is, the lower the finishing rolling temperature will be, so that the edge temperature of the strip steel will be lower. If the drop is increased, uneven wear can easily cause damage to the patterned roller

The second is that during the implementation of the automatic thickness control program (AGC) that has been widely used at present, the load distribution among the stands is unreasonable, and the load of the fifth finishing mill F5 (ie, the rolling mill before the finished product) is too small, and its adjustment coefficient It is only 0.2; while the adjustment coefficient of the last stand finishing mill F6 (the finished stand, the roll is a patterned roll) is as high as 0.7, and the reduction and load are too large, which accelerates the wear of the F6 patterned roll

Third, almost all checkered plate product standards only give a height value greater than or equal to the rib height, but there is no specific regulation on the upper limit of the rib height, which makes the rib height of the rolled checker plate too large, which intensifies the pressure on the rib height. The damage of the patterned roll leads to the damage of the pass pattern and the loss of the roll meat, which affects the use of the phenomenon, which not only increases the steel consumption per ton of the patterned roll, but also makes the average unit consumption of the patterned roll reach 19.88 yuan / ton, shortening the service life of the patterned roll; It also increases the cost of spare parts storage and maintenance and replacement, which increases the production cost; in severe cases, it causes a large area of ​​the surface of the patterned roll to fall off, which not only increases the workload of the roll maintenance, but also increases the labor intensity of the operator, and directly affects the rolling mill. Equipment availability and smooth production

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