Operation method for controlling stainless steel welding lines to stably pass through five-rack continuous rolling mills

Abstract

The invention relates to the field of stainless steel rolling and provides an operation method for controlling stainless steel welding lines to stably pass through five-rack continuous rolling mills.The operation method is implemented as follows: when the stainless steel welding lines are 10 m away from a first rack, the rolling speed is reduced to the minimum speed 30 mpm; when the thickness ofa raw material is less than or equal to 4.5 mm, the rolling pressure is reduced three times, when the thickness of the raw material is greater than 4.5 mm, the rolling pressure is reduced twice, reduction of the rolling pressure is completed within 1 s every time, and the interval time of reduction of the rolling pressure every two adjacent times is 0.5-1 s. The operation method has the beneficialeffects that it is guaranteed that all the welding lines pass through the continuous rolling mills continuously and stably; the belt broken frequency in the rolling process is reduced, and the numberof unqualified products is reduced.

Description

technical field [0001] The invention relates to the field of stainless steel rolling. Background technique [0002] The RAP line of the stainless cold rolling plant uses a five-stand continuous rolling mill with a high level of automation, and there is almost no need for human factors to adjust and control during normal rolling. However, when the weld passes through the rolling mill, various automatic functions, such as AGC (automatic thickness control) and AFC (automatic plate shape control), are not put into use, and continuous and effective human intervention control is required to ensure the stability of the rolling process, which also has For a long time, it has become a bottleneck problem that restricts the real realization of the continuous level of the entire RAP line. [0003] The control level of weld rolling is related to the yield rate, which further affects the profit. Since it was put into production in June 2014, the strip has been broken 10 times a month on...

AI Technical Summary

Problems solved by technology

Before this operation method was implemented, the control of the welding seam passing mill was in an unstable state, and it has been difficult to effectively improve it.