A method for calibration and control of strip-free roll gap in tandem cold rolling mill

Abstract

The invention relates to a control method for roll gap calibration without strip steel in a tandem cold rolling mill. The roll gap calibration conditions are prepared: the hydraulic system of the rolling mill, the transmission system, the cooling lubrication system and the new roll data are ready, and there is no strip steel in the frame; the initialization is automatic Calibrate the parameters and release the roll gap to the end: select the position and inclination control method: sew the roll to 5.5-6.5 mm above the release position, and keep the original inclination value; select the rolling force and inclination control method: sew the roll to the minimum rolling Check the position corresponding to the rolling force, and check whether the deviation between the roll gap position and the contact position is within the tolerance range of ±2mm; in the single rolling force control mode, make both sides of the roll act on the contact rolling force. The advantage is that the roll gap calibration function without strip steel on the stand can greatly improve the control precision of the rolling mill, and can produce high-quality automobile sheets and home appliance sheets whose thickness and shape meet the user's requirements.

Description

technical field [0001] The invention belongs to the field of rolling process control, in particular to a calibration control method for strip-free roll gaps of industrial cold continuous rolling mills. Background technique [0002] In the basic automatic control system of modern cold tandem mill, the hydraulic roll gap control is referred to as HGC, which is one of the most complicated systems with the highest technical content and the most precise measuring equipment. Before the rolling mill performs normal strip rolling, the rolling line of the whole rolling mill will be changed due to the replacement of work rolls or backup rolls. Therefore, it is necessary to calibrate the hydraulic roll gap zero point of the rolling mill hydraulic roll gap control system. Through calibration, the zero point standard of relative rolling force, relative position and relative inclination of hydraulic roll gap can be obtained. Only when the zero point standard of the above three variables...

AI Technical Summary

Problems solved by technology

The patent does not test the hydraulic roll bending, roll shifting, main drive system of the rolling mill, and emulsion spraying system including the work rolls and intermediate rolls, which will seriously affect the calibration accuracy

Patent Publication No.: CN101091967 discloses a roll gap calibration method for cold rolling HC mills with on-line roll change of strip steel. This patent does not check the standard zero point of rolling force, roll gap and inclination

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