Vibration inhibiting method of cold continuous rolling unit

Abstract

The invention discloses a vibration inhibiting method of a cold continuous rolling unit. The method comprises the following steps: 1) arranging a cold rolling unit vibration monitoring device on a fifth or fourth rack of the cold continuous rolling unit which is a five-rack continuous rolling machine, namely, mounting a vibration sensor on a rack housing; transmitting a rolling machine vibration signal to a data acquiring device through the vibration sensor; acquiring and processing the vibration signal through the data acquiring device, and then supplying to the rolling machine vibration monitoring device; determining whether the rolling machine vibrates by the rolling machine vibration monitoring device according to the energy magnitudeof the vibration signal; 2) arranging liquid jetting devices which can independently adjust the flow rate in front of an emulsified liquid jetting beam at an inlet of the fifth or fourth rack of the rolling machine, and jetting the liquid on the upper surface and the lower surface of a strip belt; and 3) determining to start or stop the liquid jetting devices according to the energy value of the of the rolling machine vibration signal monitored by the rolling machine vibration monitoring system or a forward sliding value calculated by a forward sliding value calculating model.

Description

technical field [0001] The invention belongs to a cold tandem rolling mill, in particular to a method for suppressing vibration of a cold tandem rolling mill. Background technique [0002] With the rapid development of modern rolling equipment, the demand for production products is developing towards high speed, ultra-thin and high-strength. But as we all know, in the production site of modern cold rolling mills, it is inevitable to face equipment vibration defects during rolling. This phenomenon is similar to the phenomenon of mechanical resonance. In production, it usually appears that the rolling mill stand exceeding a certain rolling speed will produce a tremor with a substantially fixed frequency. At this time, the vibration of the rolling mill will usually form a vertical vibration on the strip. Thickness fluctuations in the direction, in severe cases, cause alternating light and dark surface lines of the rolled strip or indentations on the rolls, as well as serious p...

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Problems solved by technology

[0012] The first type of method can effectively control the generation of vibration in principle, and has wide applicability, but the mechanical device proposed by this type of method is limited by the existing technical level, and does not take into account the rolling vibration (especially three times frequency self-excited vibration) and the characteristics of actual rolling mill machinery and equipment, the various mechanical devices proposed are not operable in actual production or in the installation space, or the mechanical structure is complicated and difficult to manufacture, or the response speed is insufficient. It is difficult to match the high-speed production of existing rolling mills, so there is no precedent for practical application

The method of changing the rolling friction has certain practicability, but the method of changing the injection amount of the emulsion at the outlet of the rack in the aforementioned patent does not take into account the huge cooling effect of the emulsion, which may cause vibrations in addition to the actual production. production problems, such as the insufficient amount of emulsion leading to poor cooling of rolling production resulting in hot scratches, or the risk of mill slippage caused by over-lubrication and fluctuations in plate shape control; in addition, since modern large-scale cold rolling units are usually equipped with volume The emulsion can reach hundreds of cubic meters, so the above-mentioned method of changing the concentration of the emulsion usually requires a long-term concentration changing operation ranging from one to several hours per operation, and the overall process is slow, so it is not actually practical

[0013] It can be seen that most of the above-mentioned patents have some problems that are difficult to use or face poor use effects in solving the problem of production vibration of cold rolling mills

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