Roll gap positioning method for straightening machine

Abstract

The invention discloses a roll gap positioning method for a straightening machine. The method comprises the following steps of: increasing a roll gap value sheet on an operating human-computer interface of the straightening machine, and setting an inlet roll gap value and a roll gap tilting value; setting an automatic / manual roll gap positioning selective switch and roll gap descending and roll gap ascending buttons on an operating platform; when a roll gap automatic positioning function is selected, inputting pass set roll gap values on the operating interface; and selecting straightening pass according to requirement, and selecting the pass set roll gaps through the roll gap descending and roll gap ascending buttons to complete the roll gap positioning of the straightening machine. By the method, the roll gap positioning of the straightening machine can be quickly and accurately performed, the method is suitable for a multi-pass straightening process for thick plates, the damage of raised buckling heads of steel plates to the straightening machine is effectively reduced, the straightness of the straightened steel plates is ensured, the shift generation and shift non-planned commutation are reduced, and the capacity and economic benefit are improved. The method is particularly suitable for eleven-roll straightening machines.

Description

technical field [0001] The invention belongs to the field of steel rolling, and relates to a straightening machine, in particular to a roll gap positioning method of the straightening machine. Background technique [0002] With the development of the national economy, the demand for high-strength, high-toughness and thick-gauge medium-thick plates is increasing year by year, and the flatness requirements of steel plates are also increasing. Therefore, the straightening level of steel plate straightening machines has received more attention. At present, the roll gap positioning of the straightening machine in the plate factory is mainly divided into two methods: [0003] 1) Domestic straightening machine, roll gap positioning manual operation; [0004] 2) Imported straightening machine, automatic operation of roll gap positioning, but only for single-pass straightening; [0005] The above production process is widely used in the production of medium and heavy plates. [00...

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Problems solved by technology

[0004] 2) Imported straightening machine, automatic operation of roll gap positioning, but only for single-pass straightening;

However, the above-mentioned two types of roll gap settings of the leveler have limitations, which affect the product quality, are not conducive to increasing production, and cannot meet the high-efficiency and high-level straightening requirements of the leveler. The main manifestations are:

[0007] 1) Manually operate the positioning of the roll gap of the leveler, the positioning accuracy is poor, and the influence of people is large;

[0008] 2) The automatic positioning of the roll gap of the straightening machine cannot adapt to the buckle head of the rolled steel plate;

[0009] 3) Manually operate the roll gap positioning of the straightening machine. During multi-pass straightening, the positioning speed is slow, which cannot meet the straightening of high-volume production lines. Due to the change of odd and even passes, the tilting value of the exit and entrance roll gap is changed;

[0010] 4) The automatic positioning of the roll gap of the leveler cannot meet the positioning of different roll gaps in multiple passes, especially to reduce the impact of the thick plate and avoid the uneven straightening pressure caused by the wave of the thick plate, which may easily cause damage to the leveler; At the same time, the inclination value of the exit and entrance roll gap cannot be changed due to the change of the odd and even passes.

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