Control method and device for cleaning between rolls of finish rolling strip steel

Abstract

The invention discloses a control method for cleaning between rolls of finish rolling strip steel, which comprises the following steps: substituting data such as roll flattening radius, strip steel outlet thickness and down rate and the like into a roll seperating force coefficient of colligation model to work out the value of rolling force coefficient of colligation; updating and working out theroll flattening radius according to the value of rolling force coefficient of colligation; substituting the roll flattening radius worked out through updating into the roll separating force coefficient of colligation model to work out the value of the roll torque coefficient of colligation; working out rolling force according to the value of the roll coefficient of colligation and working out roll torque according to the roll torque coefficient of colligation; and adjusting the cleaning between rolls according to the rolling force and the roll torque, wherein a formula for working out the roll force and the roll torque is as follows: M=W*Hm*R'Km*lambda M, and the formulas for working out the roll force and the roll torque are respectively shown in the specification. The invention also discloses a device corresponding to the method. The invention has the beneficial effects: the accuracy of working out the roll force and the roll torque is improved, thereby improving the accuracy of thethickness of strip steel, and reducing the occurrence of the accident that the head part of the strip steel is drawn to be narrow and the accident of steel scrap.

Description

technical field [0001] The invention relates to the technical field of forming processing of hot-rolled strip steel, in particular to a method and device for controlling the roll gap of finished-rolled strip steel. Background technique [0002] At present, in the production process of hot strip steel, the working process of the hot continuous rolling stand is mainly completed by computer control. Such as figure 1 As shown, it is the process that the thickness of the strip passes through the stands F1 to F7. In order to produce the strip that meets the size requirements, it is necessary to accurately control the roll gap of each stand, and the accurate calculation of the rolling force and rolling moment is crucial to the Adjusting the roll gap of the rack plays a very important role. In the prior art, the general form of the rolling force calculation formula in the rolling deformation process is: [0003] F=S·Q p ·K m (1) [0004] Among them, S—the contact area betw...

AI Technical Summary

Problems solved by technology

[0011] In formula (2), the main moment arm coefficient However, there is no uniform formula for calculating the arm coefficient suitable for various rolling conditions in the prior art, and because there are many factors affecting the arm coefficient, it is difficult to accurately calculate the arm coefficient

[0012] When the inventor implemented the above technical solution, he found the following problems in the prior art: in some cases, due to the inaccurate calculation of the rolling force and moment of some racks, the hit rate of the thickness of the strip head is low, and even causes scrap steel accident, and the following problems exist in the calculation of rolling force and rolling moment in the prior art: 1) Although there are many formulas for the influence coefficient of stress state, each has its scope of application, and it is difficult for the user to choose the formula that is suitable for the on-site rolling situation. Most of the stress state influence coefficient formulas are complex, which is not convenient for computer online control; 2) There are few optional formulas for the force arm coefficient, which is more empirical and not convenient for actual operation

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