Setting method of work roll bending of one side hydraulic cylinder in tandem cold rolling mill
A technology for work roll bending and cold tandem mills, which is applied to metal rolling stands, metal processing equipment, and metal rolling mill stands, and can solve problems such as complex model relationships, abnormal regression, and low control accuracy
Active Publication Date: 2018-11-16
ANSTEEL BEIJING RES INST
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Problems solved by technology
Due to the complex model relationship, the regression process is slow and regression abnormalities often occur, so its control accuracy is not high
Method used
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[0030] Below in conjunction with embodiment the present invention is described in detail.
[0031] like figure 1 As shown, the technology provided by the present invention is completed on the cold-rolled silicon steel 1500mm five-stand tandem cold rolling mill, producing 0.5mm specification cold-rolled products, strip width B=1250mm, product specification ST12, and the realization process is as follows:
[0032] 1. The single side hydraulic cylinder of the rolling mill work roll bending hydraulic system such as figure 2 As shown, set the reference value of the bending roll to F REF , the actual value of the bending roll is F ACT , the switching value of the working mode switching point is F SWI and hold a value of F HLD and F SWI >F HLD , set value of bending roll F SET .
[0033] Among them, the switching value F SWI =10%, keep the value F HLD =8%, the work roll bending control method is as follows image 3 As shown, the PID control algorithm is adopted.
[0034]...
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The invention discloses setting methods for roller bending of working rollers of a single-side hydraulic cylinder of a cold tandem rolling mill. By setting a roller bending reference value, a roller bending actual value, the switching value of a working mode switching point, and a maintaining value, the control precision of roller bending of the cold-rolling working rollers is improved; and both the setting method for switching from positive roller bending to negative roller bending and the setting method for switching from negative roller bending to positive roller bending are provided. By adoption of the setting methods, smooth transition of switching between positive roller bending and negative roller bending of the working rollers of the single-side hydraulic cylinder can be achieved, impact to a hydraulic cylinder body is reduced, and the stability and precision in the rolling process are improved; and meanwhile, the methods can adopt original control equipment and are easy to maintain, technology import capital investment can be reduced, and the increasingly-strict requirements of cold rolling for thickness quality and market competitiveness reinforcement are met.
Description
technical field [0001] The invention belongs to the technical field of iron and steel production control, and in particular relates to a positive and negative bending roll switch setting method for a work roll with a single-side hydraulic cylinder structure in a continuous cold rolling mill. Background technique [0002] The incoming materials for the tandem cold rolling mill are mainly hot-rolled thin plates, and the final products are used in industries such as home appliances, automobiles and construction. For general users, cold-rolled strip is the rolled product they directly face, so there are high requirements for their plate shape and cross-sectional shape. The work roll bending system has the advantages of simple structure, fast response, obvious shape control effect, and easy combination with other control methods. All are equipped with hydraulic roll bending devices, and the proper bending roll setting value is the key to obtain good shape control quality. At pr...
Claims
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IPC IPC(8): B21B31/32
CPCB21B31/32
Inventor 张岩卢长英高健秦大伟曹忠华张栋
Owner ANSTEEL BEIJING RES INST