A Control Method for Elongation Fluctuation of Temper Mill

A control method and elongation technology, applied in the direction of elongation control, etc., can solve the problems of stamping cracking, orange peel, the length of the out-of-tolerance section of the strip head and tail, and the fluctuation of elongation, etc., to improve the utilization rate of finished products, The effect of ensuring the elongation control accuracy and reducing the elongation control error

Active Publication Date: 2017-05-03
SHOUGANG CORPORATION
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AI Technical Summary

Problems solved by technology

[0005] In the existing technology, the continuous annealing and tempering machine has large fluctuations in the flat elongation of the strip under the conditions of passing the weld, acceleration and deceleration, and low speed. Cracking, Orange Peel Defects

Method used

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  • A Control Method for Elongation Fluctuation of Temper Mill
  • A Control Method for Elongation Fluctuation of Temper Mill
  • A Control Method for Elongation Fluctuation of Temper Mill

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Embodiment Construction

[0042] The invention provides a control method for the elongation fluctuation of the temper mill, which can improve the elongation control accuracy in the low speed and acceleration and deceleration stages, and at the same time ensure the elongation control accuracy in the high speed stage, and reduce the length of the out-of-tolerance section of the strip elongation at the head and tail .

[0043] The technical solution of the embodiment of the present application is to solve the above-mentioned technical problems, and the general idea is as follows:

[0044] A method for controlling elongation fluctuations of a temper mill, which obtains the strip steel speed at the entrance of the temper mill and the strip steel exit speed of the temper mill, and obtains the actual elongation of the strip; according to the actual elongation of the strip and the The set value of elongation is used to obtain the first deviation value of elongation; the first deviation value of elongation is p...

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Abstract

The invention belongs to the technical field of cold-rolled strip steels and discloses a control method for a ductility fluctuation of a temper mill. The control method comprises the following steps: obtaining a strip steel speed at an inlet of the temper mill and a strip steel speed at an outlet of the temper mill to obtain an actual ductility of the strip steel; obtaining a first ductility deviation value according to the actual ductility of the strip steel and a set ductility set of the strip steel; obtaining a rolling force correction value from the first ductility deviation value through a ductility proportional-integral controller; and obtaining a second ductility deviation value according to the rolling force correction value. The control method is capable of improving the ductility control accuracy at low-speed and acceleration / deceleration stages, and meanwhile, ensuring the ductility control accuracy at a high-speed stage and reducing a ductility deviation section length of each of the head and the tail of the strip steel.

Description

technical field [0001] The invention relates to a rolling method of cold-rolled strip steel, in particular to an elongation control method. Background technique [0002] After recrystallization annealing, the cold-rolled strip steel eliminates the work hardening structure, but the mechanical properties and processing properties deteriorate. At this time, the stress-strain curve of the strip steel has an obvious upper yield limit, and a yield plateau appears at the lower yield limit. The methods to eliminate the yield plateau include temper rolling, tensile deformation and straightening, etc. Mass production practice has proved that temper rolling is the most effective processing method and is widely used in large-scale production. [0003] Different from conventional cold rolling, tempering is essentially a small deformation (0.5% to 5%) rolling, which is an important production process in the cold rolling process. Elongation is the most basic process parameter in leveling....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/56
CPCB21B37/56
Inventor 文杰于孟王永强胡建军谭谨峰令狐克志昝现亮王慧李宫胤唐伟张晓峰刘顺明司国飞
Owner SHOUGANG CORPORATION
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