Method and device for controlling strip shape and precision of hot rolling steel strips and plates

Abstract

The invention belongs to hot rolling equipment and a hot rolling method, and particularly relates to a method and a device for controlling the strip shape and the precision of hot rolling steel strips and plates. The invention regulates the deformation capacity of the metal by changing the temperature distribution in the width direction of rolled pieces so as to reach ideal strip shape control, i.e. an aerial fog cooling medium is accurately sprayed on the rolled pieces to change the temperature distribution in the width direction of the rolled pieces; the cooling parameters for spraying along the width of the rolled pieces are regulated according to the set and feedback information to realize the open-loop or closed-loop strip shape control; aerial fog cooling devices are arranged in front of and at the back of a reversing mill; and the aerial fog cooling devices in front of rolling mills and among the standers of the rolling mills in series-type hot steel strip rolled pieces and simultaneously spray the aerial fog on the upper and lower surfaces of the rolled pieces. The invention has simple structure and strong applicability, can be used for the strip shape control of the newly-built hot rolling mill or be used for carrying out improvement of the strip shape control on the rolling mill, is also suitable to roll the hot rolling steel strips and plates of the nonferrous metals and has wide popularization value.

Description

technical field [0001] The invention belongs to hot-rolling equipment and a hot-rolling method, and relates to a method and equipment for controlling hot-rolled steel strips and steel plates, in particular to a method and equipment for controlling the shape and precision of hot-rolled steel strips and steel plates. Background technique [0002] In the rolling process of hot-rolled strip mills and medium-heavy plate mills, the cross-sectional shape of hot-rolled strips and steel plates will be produced due to factors such as uneven temperature distribution of rolled pieces, roll deflection, and wear. Some degree of uneven deformation, see Figure 1~3 , resulting in convexity, plate shape defects in flatness. Due to the time gap before and after the rolled piece enters the roll, the temperature drop along the length direction of the rolled piece is the main reason for the thickness deviation of the strip / steel plate. [0003] The current typical technology is briefly describe...

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Its common feature is that it heats and heats the rolled p

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