Reduction schedule setting method of cold continuous rolling unit taking vibration abatement as target

Abstract

The invention relates to a reduction schedule setting method of a cold continuous rolling unit taking vibration abatement as a target and belongs to the field of rolling. The method comprises the following steps of collecting unit associated parameters and strip-rolling process parameters; defining vibration judging indexes of racks; giving a reduction schedule taking vibration abatement as the target to optimize an initial set value of a target function comprehensively; setting the reduction schedule; calculating bit angles of the racks, the inlet speeds and oil film thicknesses of strip steel of the racks, friction coefficients between working rollers of the racks and the strip steel and the neutral angles of the racks; calculating the vibration judging indexes of the racks; and by taking the minimum mean square errors of the rolling mill vibration judgment index optimum value and rolling mill vibration judging index values solved in an actual rolling process and the minimum value ofthe maximum rolling mill vibration judgment index values of the racks as the optimized target function and by taking a lower threshold value of the vibration judgment index solved as a rolling process is in a sub-lubricated state when the neutral angle is as half as the bit angle as a constraint condition, optimizing the reduction schedule of the rolling process of the cold continuous rolling unit finally.

Description

technical field [0001] The invention belongs to the field of cold tandem rolling, and in particular relates to a method for setting a reduction schedule suitable for a tandem cold rolling mill with the aim of suppressing vibration. Background technique [0002] For tandem cold rolling mills, during the high-speed rolling process, mill vibration defects occur frequently, which will not only weaken the resonance mechanical properties of the rolling mill, shorten the replacement cycle of parts, but also reduce the rolling accuracy, which affects the The quality of finished strip products has been guaranteed, and it has become the focus and difficulty of on-site technical research. [0003] In the past, once a vibration defect occurred on site, the speed reduction method had to be adopted, which was also the fundamental reason why the rolling speed of the unit could not be increased. [0004] However, for the tandem cold rolling mill, due to the characteristics of the equipment...

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Problems solved by technology

[0009] Obviously, both of the above two inventions aim at the control of the shape and convexity of the strip, and realize the setting of the reduction regulation, but do not involve the goal of suppressing vibration, and realize the optimal reduction regulation of the cold tandem mill. Therefore, the technical solution cannot achieve the purpose of controlling the vibration defects of the rolling mill and improving the surface quality of the finished strip

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