Withdrawal roll pressure control method for coiler

Abstract

The invention provides a method for controlling pressure of a pinch roller of a reeling machine. The method comprises the following steps: 1, the pressure values of two lateral guide plates on strip steel are measured and are input to a controller; 2, the pressure difference between the two lateral guide plates is calculated; and according to the calculated pressure difference, the wandering direction of the strip steel is judged; 3, according to the pressure values of the two lateral guide plates, the adjusting amounts of two lateral pressure of the pinch roller of the strip steel are calculated; and 4, according to the calculated adjusting amounts of two lateral pressure of the pinch roller, the pressure of the pinch roller at one side of the wandering direction of the strip steel is increased; the pressure at the other side of the pinch roller is reduced; and the steps are repeated. Through continuous measurement and comparison of pressure exerted on the two lateral guide plates when the strip steel wanders, the wandering direction of the strip steel is judged; and the pressure at two sides of the pinch roller is automatically adjusted so as to control the roller slot of the pinch roller and ensure the rolling quality of the strip steel.

Description

technical field [0001] The invention relates to the field of metallurgical industry, in particular to a method for controlling the pressure of pinch rolls of a coiler. Background technique [0002] The coiler is an important equipment of the hot rolling production line, which is used to coil the rolled finished hot-rolled steel strip into steel coils. Such as figure 1 As shown, the coiler 1 mainly includes equipment such as a side guide plate, a pinch roller 11 , an auxiliary roll, and a reel, and the side guide plate includes a transmission side guide plate 12 and an operation side side guide plate 13 . The main function of the pinch roller 11 is to apply a certain clamping force to the strip steel 15 in the steel biting stage of the head, and implement the first bending deformation to it at the same time; to apply a stable tension force to the strip steel 15 in the coiling stage of the tail, so as to Guaranteed good roll quality. The pinch roller 11 adopts full hydrauli...

AI Technical Summary

Problems solved by technology

[0006] (1) The next roll of strip can only be controlled according to the actual coil shape quality of the previous coil, and the dynamic control of the strip coil cannot be realized

[0007] (2) The accuracy of manual correction is difficult to guarantee: Since the observation of the roll shape and the selection of the adjustment amount are all based on the experience of the operator, there are often cases of excessive or insufficient correction, which often affects the quality of the roll shape

[0008] (3) Due to the frequent changes in the width and thickness specifications of the strip steel in production, the operator must frequently modify the pressure on both sides of the pinch roller after the specification is changed, which greatly increases the workload of the operator

[0010] (1) After increasing the clamping force of the side guide plate, it will cause serious wear of the side guide plate, which must be replaced and surfacing repaired every day;

[0011] (2) After increasing the clamping force of the side guide plate, slippage will occur between the strip steel and the reel, and the strip steel will have serious sheathing problems at the exit of the rolling mill;

[0012] (3) Increasing the clamping force of the side guide plate and the tension of the coiler will be limited by the capacity of the equipment. Sometimes, even if the clamping force of the side guide plate and the tension of the coiler are set to the maximum, the fault of misalignment cannot be completely eliminated.

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