Hot tandem mill zero-position adjusting method with rolling force protection effect

Abstract

The invention relates to the field of control of hot-rolled steel strip production, in particular to a hot tandem mill zero-position adjusting method with rolling force protection effect, which includes the following steps of firstly, starting the zero-position adjusting function, resetting the zero position by roll shifting, performing position control and then performing first-stage adjustment and second-stage adjustment by a pressing system; secondly, determining the subsequent step according to detection results of oil injection deviation, detecting the rolling force deviation of a rolling mill during running, confirming completion by operators, confirming the relation between roll gap and oil injection by a control system, detecting current oil injection position according to the zero-position rolling force, resetting the pressing system to complete zero-position adjustment; and thirdly, resetting the pressing system, sending a system alarm and interrupting the zero-position adjustment program when the operators confirm to abandon. The hot tandem mill zero-position adjusting method with the rolling force protection effect can effectively improve equipment safety in automatic zero-position adjusting process and has high popularization value.

Description

technical field [0001] The invention relates to the field of production control of hot-rolled strip steel, in particular to a method for adjusting the zero position of a hot continuous rolling mill. Background technique [0002] The process of determining the position of the zero roll gap after each change of rolls (including work rolls and backup rolls) in the strip mill is called the zero position adjustment of the reduction. When the rolling force must reach the specified value during the zero position adjustment, the zero roll gap position in the zero position adjustment can only be found. The zero roll gap position is the basis of the reduction setting, and the accuracy of the reduction setting directly determines the thickness accuracy of the hot-rolled strip. All strip mills shall carry out zero adjustment and zero adjustment and leveling after changing rolls (including work rolls and back-up rolls). [0003] The existing basic steps of zero adjustment: [0004] St...

AI Technical Summary

Problems solved by technology

[0010] 1. In the process of zero adjustment, the rolling force is relatively large when it involves position control, and the roll is in a static state. Once the size of the related equipment is wrong, it will cause damage to the roll and related equipment.

[0011] 2. The automation in the zero adjustment process, once the rolling force is abnormal, personnel cannot manually intervene, resulting in the expansion of the accident

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