Cold-rolled tin plate continuous annealing line temper mill roll shape configuration method and configuration structure

Abstract

The invention discloses a cold-rolled tin plate continuous annealing line temper mill roll shape configuration method and configuration structure, and belongs to the technical field of metallurgy, and the method comprises the following steps: analyzing roll surface temperature distribution and hot roll shape in the service period of a working roll; designing a new working roll shape for compensating the hot roll shape; designing a new roll shape of the supporting roll, wherein the contact pressure between the supporting roll and the working roll is uniformly distributed; discretizing newly designed roll shape data, and inputting the discretized data into a grinding machine for grinding. The device is applied to a certain cold-rolled tin plate continuous annealing line temper mill, through the synchronous design of the TCR roller shape of the working roller and the SBR roller shape of the supporting roller, uniform abrasion between the supporting roller and the working roller is achieved, the rolling force pressure difference between the operation side and the transmission side is remarkably reduced, the high-speed operation stability of a unit is improved, and the average production speed is remarkably increased; the service kilometers of the supporting roller are increased by more than one time, and the production capacity of a tin plate continuous annealing line is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a roll configuration method and a configuration structure of a cold-rolled tin plate continuous annealing line tempering machine. Background technique [0002] The tempering machine of the continuous annealing line of cold-rolled tin plate is an important equipment to ensure the quality of the finished tin plate. Controlling the roughness and brightness of the finished strip plays a very important role. [0003] In actual production, the skin pass mill often has the problem of large rolling force difference (referred to as pressure difference) between the operating side and the driving side (OS-DS), which is difficult to control, mainly manifested in: (1) New backup rolls There is no large pressure difference when the machine is on the machine, but it appears after a certain period of production; (2) The pressure difference is irregular. [0004] Further analysis shows that th...

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Problems solved by technology

[0003] In actual production, the skin pass mill often has the problem of large rolling force difference (referred to as pressure difference) between the operating side and the driving side (OS-DS), which is difficult to control, mainly manifested in: (1) New backup rolls There is no large pressure difference when the machine is on the machine, but it appears after a certain period of production; (2) The pressure difference is irregular

[0004] Further analysis shows that the reason for the large pressure difference that is difficult to control is: (1) The temperature of the bearing ends on both sides of the work roll body is higher than that of the middle section during production, and the thermal expansion forms a negative convex hot roll shape. It is a flat roll shape, and the work roll is also similar to a flat roll shape (+20um), which cannot compensate for the influence of the negative crown hot roll shape; No cooling, no lubrication, very severe uneven wear at both ends of the roll body between the backup roll and the work roll

[0005] The problem of large pressure difference seriously affects the normal production. On the one hand, the pressure difference is occasionally too large to cause tripping, which affects the production of the whole line;

The problem of the large pressure difference of this skin pass mill comes from its dry skin pass process, which brings about complex production problems of uneven wear between rolls and thermal crown interference. The existing technology only adopts reduced speed production and increases the frequency of changing support rolls The way to avoid large quality fluctuations and sudden failures of production stoppages, which reduces the effective production time and increases product costs

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