Tension stabilizing control method and device for leveling machine

Abstract

The invention discloses a tension stabilizing control method for a leveling machine. The method comprises the following steps of detecting current inlet tension of a leveling machine; detecting current outlet tension of the leveling machine; inputting an inlet adjusting tension and an outlet adjusting tension by a tension controller according to the change of the inlet tension and outlet tension; detecting and tracking a welding seam position; when the welding seam position enters the inlet of the leveling machine, adjusting the inlet tension and outlet tension of the leveling machine into an average value of current inlet tension and current outlet tension; when the welding seam position is out of the outlet of the leveling machine, adjusting the inlet tension of the leveling machine into the inlet adjusting tension produced by the tension controller, and adjusting the outlet tension of the leveling machine into the outlet adjusting tension produced by the tension controller. The invention further discloses a tension stabilizing control device for the leveling machine. According to the method and device provided by the invention, the average value of the inlet and outlet tension is used as a transition value for tension switching, and the extension rate of a steel band is further taken into account, so that the tension control is more accurate and steady.

Description

technical field [0001] The invention relates to the technical field of metallurgy automation, in particular to a method and device for stabilizing the tension of a temper mill. Background technique [0002] The temper machine is an important processing equipment in the process of strip steel processing. The quality of the strip steel processed by the temper machine is closely related to the tension control at the entrance and exit of the temper machine. In the art, several techniques have been proposed to control the tension at the entrance and exit of the temper mill. [0003] Chinese patent application CN200610117437.9 proposes a tension control system and method for a planetary gear structure tension roller skin pass mill. The scheme discloses a tension control system of a planetary gear structure tension roller type skin pass mill, including an entrance tension meter and an entrance tension feedback device, and an exit tension meter, which is placed at the exit of the s...

AI Technical Summary

Problems solved by technology

[0006] 1) The gap between the adjusted value (set value) and the actual value of the inlet tension is too large, so that the tension controller needs to be adjusted in a large range, and the tension value before and after the adjustment is too large.

The resulting result is: on the one hand, the adjustment ability of the tension controller is limited and cannot fully meet the above adjustment requirements.

On the other hand, the excessive tension value drop before and after adjustment also affects the stability of the tempering machine.

[0007] 2) During the rolling process of the temper mill, the strip will be elongated. Due to the existence of elongation, the strip will become longer, and the elongation of the strip will cause tension loss

None of the above schemes takes into account the tension change caused by the elongation rate, which makes the actual tension control not accurate enough, and also affects the working stability of the tempering machine

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